If you are shopping for a yacht, fuel is one of the first running costs you will want to understand, and one of the hardest to pin down from a listing. Brochures quote top speeds and tank sizes. Sea trial reports quote gallons per hour at a handful of RPM settings. Neither tells you what the yacht will actually cost to run the way you plan to use it.
The honest answer to “how much fuel does a yacht use?” is that it depends far more on speed and hull type than on length. In a published sea trial, a Hatteras 70 Motor Yacht burned about 20 gallons per hour at 10.2 knots and about 78 gallons per hour at 18.6 knots. Same yacht, same day, nearly four times the fuel. If you are still getting familiar with the difference between hull types, our guide to planing hull vs displacement hull designs is a useful companion to this one.
This guide covers yacht fuel consumption in practical terms: typical burn by size, how hull type changes the picture, how capacity relates to range, how to calculate trip fuel and cost, what fueling looks like in South Florida, and what to check before you commit to a new or pre-owned yacht. Where figures are quoted, they come from published sea trials and manufacturer data, not guesswork.
Yacht Fuel Consumption: Key Facts at a Glance
| Topic | What to Know |
|---|---|
| Diesel rule of thumb | Roughly 1 gallon per hour for every 18 horsepower the engines are actually producing |
| 40 to 60 ft yachts | About 12 to 65 gallons per hour in published sea trials, depending on speed |
| 70 to 85 ft yachts | About 9 to 120 gallons per hour in published sea trials, depending on speed and hull |
| Most efficient speed | Usually displacement speed, often around 8 to 10 knots for the yachts in this guide |
| Fuel weight | Diesel weighs about 7.2 pounds per gallon |
| Generator use | A 25 kW generator at half load uses roughly 1.2 gallons per hour, or about 28 gallons per day |
| Fuel reserve | Rule of thirds: one third out, one third back, one third in reserve |
| Diesel price, late September 2026 | About $6.38 per gallon U.S. average on-highway; about $5.95 in the Lower Atlantic region |
| Florida marina diesel | Recent dock quotes on Florida’s Atlantic coast ran from a little over $5 to about $8 per gallon |
All fuel prices change weekly. Figures in this guide were checked in late September 2026 and should be confirmed before you budget or fuel.
What Determines How Much Fuel a Yacht Uses?
A diesel engine’s fuel burn depends mainly on how much power it is producing at that moment, not on its rated horsepower. A well-maintained marine diesel burns about 0.4 pounds of fuel per horsepower per hour, and diesel weighs about 7.2 pounds per gallon, which works out to roughly one gallon per hour for every 18 horsepower delivered. A pair of 1,000-horsepower engines loafing along at displacement speed may be producing a small fraction of that power, and burning a small fraction of the fuel.
In practice, five factors decide where a given yacht lands on any day:
- Speed: The single biggest variable. Fuel burn rises steeply as a yacht pushes past its efficient speed.
- Hull type: Displacement, semi-displacement and planing hulls each have a very different relationship between speed and fuel.
- Load: Fuel, water, guests, stores and a large tender all add weight the engines have to push.
- Sea state: Head seas, wind and adverse current raise the power needed to hold a given speed.
- Hotel load: Generators running air conditioning, stabilizers and galley equipment draw from the same tanks.
Yacht Fuel Consumption Per Hour by Size
The table below shows published sea trial figures for a range of yachts. Where two figures are shown, the first is a slower cruise and the second a faster one.
| Yacht | Length | Speed (knots) | Fuel Burn (gallons per hour) |
|---|---|---|---|
| Nordic Tugs 40 | 40 ft | 14 | 13 |
| Pardo 43 | 43 ft | 30 | 36 |
| Cruisers Yachts 50 Fly | 50 ft | 9.5 / 18.8 | 12 / 46 |
| Cruisers Yachts 57 Fly | 57 ft | 25 | 63 |
| Absolute 70 Fly | 70 ft | 15 / 21.9 | 57 / 73 |
| Hatteras 70 Motor Yacht | 70 ft model (74 ft 6 in LOA) | 10.2 / 18.6 | 20 / 78 |
| Pardo Endurance 72 | 72 ft | 20 / 24 | 63 / 77 |
| Pershing GTX80 | 80 ft | 10 / 28 | 18 / 116 |
| Princess Y80 | 80 ft | 26 | 120 |
| Grand Banks 85 Skylounge | 85 ft | 9 / 21 | 9 / 57 |
These are single test-day figures with a specific engine package, load and sea state. Treat them as reference points, not guarantees for another hull of the same model.
Small Yacht Fuel Consumption (Under 45 Feet)
At this size, hull type decides almost everything. The Nordic Tugs 40, a semi-displacement cruiser in the trawler tradition, burned 13 gallons per hour at 14 knots. The Pardo 43, a performance dayboat, burned 36 gallons per hour at a 30-knot cruise. Many boats in this range run gasoline outboards rather than diesels, and gasoline engines burn more fuel per horsepower, so compare like with like.
50 to 60 Foot Yacht Fuel Consumption
The Cruisers Yachts 50 Fly is a good illustration of a planing flybridge: 12 gallons per hour at a 9.5-knot economy cruise and 46 gallons per hour at 18.8 knots, with the engines at 78 percent load. The larger Cruisers 57 Fly burned 63 gallons per hour at 25 knots. Propulsion matters here too, and our comparison of pod drive vs direct drive explains how that choice affects efficiency.
70 to 80 Foot Yacht Fuel Consumption
This is where the gap between slow and fast cruise becomes a real line in the budget. The Pershing GTX80 burned about 18 gallons per hour at 10 knots and about 116 gallons per hour at a 28-knot cruise. The Hatteras 70 went from about 20 to about 78 gallons per hour between 10.2 and 18.6 knots. Many motor yachts in this class are built to plane, so owners are choosing between speed and economy on almost every passage.
Superyacht and Mega Yacht Fuel Consumption
Builders of large custom yachts usually publish range at a stated speed rather than gallons per hour. The Feadship Musashi, for example, is reported to carry about 88,000 U.S. gallons for a range of 6,000 nautical miles at 12 knots. Simple division suggests up to about 15 gallons per nautical mile at that speed, though that is a rough upper bound, since published ranges assume specific conditions and planners keep a reserve.
On a Mega Yacht, propulsion is only part of the story. Generators run around the clock for air conditioning, stabilizers, galley equipment and water makers. A single 200 kW marine generator can be rated at roughly 15.5 gallons per hour at maximum load, and larger yachts often carry two or more. Before relying on any published figure, ask the captain or management company for logged consumption underway and at anchor.
How Hull Type Affects Fuel Consumption
The most useful efficiency figure is nautical miles per gallon, because it shows what each gallon actually buys. Here is what happens when the same yachts slow down.
| Yacht | Slow Cruise | Miles per Gallon (Slow) | Fast Cruise | Miles per Gallon (Fast) |
|---|---|---|---|---|
| Grand Banks 85 Skylounge | 9 knots, 9 gph | 1.00 | 21 knots, 57 gph | 0.37 |
| Cruisers Yachts 50 Fly | 9.5 knots, 12 gph | 0.79 | 18.8 knots, 46 gph | 0.41 |
| Pershing GTX80 | 10 knots, 18 gph | 0.56 | 28 knots, 116 gph | 0.24 |
| Hatteras 70 Motor Yacht | 10.2 knots, 20 gph | 0.51 | 18.6 knots, 78 gph | 0.24 |
Miles per gallon are nautical miles per U.S. gallon, calculated from the published test figures above.
Displacement Hulls
A displacement hull moves through the water rather than over it, and its efficient speed is limited by waterline length. Push past that point and fuel burn climbs steeply for very little extra speed. In one published example, a full-displacement trawler in the 40 to 50 foot range burned 3 gallons per hour at 7.5 knots and 11 gallons per hour at 9 knots. That extra 1.5 knots cost roughly three times the fuel per mile.
Semi-Displacement Hulls
A semi-displacement hull sits in the water at low speed and generates partial lift as it goes faster, without fully climbing on top of the water. It can cruise well above displacement speed while using less fuel than a planing hull at comparable speeds, which is why the design is so common on mid-size motor yachts. The Absolute 70 Fly, for example, burned 57 gallons per hour at 15 knots and 73 gallons per hour at 21.9 knots.
Planing Hulls
Planing yachts rise and run on top of the water once they have enough power, which is how they reach 25 to 30 knots and beyond. The trade-off is fuel. Interestingly, economy on plane can stay fairly flat across a band of speeds: test data for the Pershing GTX70 showed about 3.6 to 3.7 gallons per nautical mile anywhere from 15 to 30 knots. The large savings usually come from dropping to displacement speed, not from easing back a few knots while still on plane.
Yacht Fuel Capacity vs Fuel Consumption
First-time buyers often read a big fuel tank as a sign of long range. Capacity and consumption are related, but range comes from how the two interact at the speed you actually run.
What Fuel Capacity Means
Capacity is the volume the tanks can hold, usually listed in U.S. gallons on American spec sheets. It sets the ceiling on range, and it also adds weight. At about 7.2 pounds per gallon, a 1,585-gallon load of diesel weighs roughly 11,400 pounds, which affects trim, speed and burn until it is used.
What Fuel Consumption Means
Consumption is the rate of use, normally gallons per hour at a given RPM and speed. On larger yachts it should include generator hours as well as propulsion. A figure quoted without speed, load and sea state attached is of limited use.
Why a Larger Fuel Tank Does Not Always Mean Better Range
| Yacht | Fuel Capacity (U.S. gal) | Published Range |
|---|---|---|
| Cruisers Yachts 57 Fly | 611 | 250 nm at 25 knots; about 700 nm at 9 knots |
| Pershing GTX70 | 1,110 | Just over 300 nm at 20 to 30 knots; about double at 10 knots |
| Pershing GTX80 | 1,347 | 300 nm at 28 knots, 10% reserve |
| Pardo Endurance 72 | 1,585 | 453 nm at 20 knots, 10% reserve; 900+ nm at 10 knots |
| Palm Beach 70 | 1,585 | 793 nm at cruise speed |
| Hatteras 70 Motor Yacht | 2,200 | About 471 nm at 18.6 knots; about 1,007 nm at 10.2 knots, 10% reserve |
| Feadship Musashi | About 88,000 | 6,000 nm at 12 knots |
The Pardo Endurance 72 and Palm Beach 70 carry the same 1,585 gallons, yet their headline ranges differ considerably; the Palm Beach’s hull is designed to slice through the water rather than climb on top of it. The Hatteras 70 carries nearly 40 percent more fuel than the Pardo, but its range at around 19 to 20 knots is similar. Speed and hull efficiency decide how far the fuel goes.
How to Calculate Yacht Fuel Consumption
Four simple formulas cover most planning. The accuracy depends entirely on the burn rate you start with, so use the yacht’s engine display, fuel flow meters or logged fill-ups rather than a brochure figure.
| What You Need | Formula |
|---|---|
| Hours underway | Distance (nm) ÷ speed (knots) |
| Trip fuel | Hours underway × fuel burn (gph) |
| Fuel cost | Trip fuel (gallons) × price per gallon |
| Fuel economy | Speed (knots) ÷ fuel burn (gph) = nautical miles per gallon |
For itineraries quoted in liters, one U.S. gallon equals about 3.785 liters.
Example: Fort Lauderdale to Bimini
Bimini sits roughly 50 nautical miles from Fort Lauderdale across the Gulf Stream, making it a favorite among yachting destinations from South Florida. Using the Cruisers Yachts 50 Fly test figures and an illustrative diesel price of $6.50 per gallon:
| Plan | Speed and Burn | Time Each Way | Fuel Each Way | Round-Trip Fuel | Round-Trip Cost at $6.50/gal |
|---|---|---|---|---|---|
| Fast cruise | 18.8 knots, 46 gph | About 2.7 hours | About 122 gal | About 245 gal | About $1,590 |
| Economy cruise | 9.5 knots, 12 gph | About 5.3 hours | About 63 gal | About 126 gal | About $820 |
The fast crossing saves about five hours of total running time and costs roughly twice as much fuel. The Gulf Stream, wind against current and sea state can change both figures on the day. Add generator time on top: a 25 kW generator running around the clock at half load would use roughly 28 gallons per day at anchor.
Why You Should Plan a Proper Fuel Reserve
Many published range figures hold back only 10 percent. That is fine for comparing yachts, but it is thin for offshore planning. The rule of thirds, a long-standing boating safety guideline, allots one third of the fuel for the outbound leg, one third for the return and one third for emergencies. Applied to the fast-cruise example above, a 245-gallon round trip would call for roughly 370 gallons aboard at departure.
How Far Can a Yacht Travel on One Tank?
Range equals usable fuel divided by hourly burn, multiplied by speed. A yacht carrying 1,000 usable gallons and burning 50 gallons per hour at 20 knots has about 20 hours of running time, or roughly 400 nautical miles before any reserve. Real-world range is almost always shorter than the brochure figure. These are the factors that close the gap:
- Cruising speed: The Hatteras 70’s published range roughly doubled, from about 471 to about 1,007 nautical miles, when speed dropped from 18.6 to 10.2 knots.
- Sea conditions: Off South Florida, the Gulf Stream can help or hinder depending on heading, and head seas raise burn quickly. Checking reliable yachting weather resources is part of fuel planning.
- Engine load: Heavy fuel, water and guest loads, plus towing a large tender, push engines harder at the same speed.
- Generator and hotel load: Air conditioning, stabilizers and galley systems draw fuel continuously, especially in South Florida summers.
- Hull and running gear condition: Marine growth, a damaged propeller, clogged filters or poorly tuned injectors all cost range.
How Much Does Yacht Fuel Cost in 2026?
Diesel prices in 2026 have been volatile and sharply higher than in 2025. The U.S. average on-highway diesel price was $6.382 per gallon for the week of September 28, 2026, down from $6.529 the week before and up from about $3.75 a year earlier. The Lower Atlantic region, which includes Florida, averaged $5.953 that week.
Marina diesel is priced separately from road diesel. Recent dock price reports for Florida’s Atlantic coast listed quotes from a little over $5 to about $8 per gallon, with some shown before sales tax. Confirm the price, tax treatment and any volume minimum with the dock or supplier before fueling.
What It Costs to Fill a Yacht
The table applies three illustrative prices to published fuel capacities. These are estimates for comparison only; few owners fill from empty, and actual cost depends on the dock, volume, taxes and the week you buy.
| Yacht (Published Capacity) | At $5.50/gal | At $6.50/gal | At $7.50/gal |
|---|---|---|---|
| Cruisers Yachts 57 Fly (611 gal) | About $3,360 | About $3,970 | About $4,580 |
| Pershing GTX80 (1,347 gal) | About $7,410 | About $8,760 | About $10,100 |
| Hatteras 70 Motor Yacht (2,200 gal) | About $12,100 | About $14,300 | About $16,500 |
| Superyacht with about 88,000 gal | About $484,000 | About $572,000 | About $660,000 |
Budgeting Fuel for a Season
For annual planning, multiply expected engine hours by average burn and an assumed fuel price, then add generator hours. As an illustration only, 150 engine hours at 46 gallons per hour and $6.50 per gallon comes to about $44,850 for propulsion alone. Fuel is one line in a larger budget that includes dockage, insurance, crew, maintenance and financing; our guides on how to finance a yacht and whether a yacht is a good investment cover the wider picture. If you charter rather than own, fuel is often billed on top of the base fee on crewed charters, so check how it is handled when comparing the cost to charter a yacht.
Comparing Yachts? Know What They Will Really Cost to Run.
Two yachts of the same length can differ by thousands of dollars a season in fuel alone. Andy Kniffin, CPYB can help you look past brochure figures, compare real operating data and shortlist yachts that suit the way you actually cruise, before you spend time on viewings.
Fueling a Yacht in South Florida
Fueling a 30-foot boat and fueling an 80-foot motor yacht are different operations. Larger yachts need a fuel dock with enough depth, length and pump rate, or a delivery arranged to their berth.
| Option | Best Suited To | Points to Confirm |
|---|---|---|
| Marina fuel dock | Most yachts that can fit alongside | Depth, maximum length, pump rate, posted price, whether tax is included |
| Mobile or truck delivery | Yachts at private or marina berths, larger fill-ups | Volume minimums, scheduling, delivery fees, marina rules on third-party fueling |
| Arranged bulk supply | Superyachts and large refills | Pricing terms, fuel specification, documentation, scheduling |
Some Florida marinas and delivery services set volume minimums, with 100-gallon minimums appearing at some locations. Where you keep the yacht shapes these choices, and our overview of yacht dockage in South Florida covers berth options.
Fuel Quality and Filtration
Contaminated or water-laden fuel can shut down engines at the worst possible moment. Buy from established suppliers, keep receipts, check water separators and primary filters after fueling, and carry spare filter elements. Our diesel engine maintenance advice offers related guidance.
Spills and Reporting
Federal law treats fuel spills seriously. Any oil or fuel spill that leaves a sheen on the water must be reported to the U.S. Coast Guard National Response Center at 1-800-424-8802, and many states require their own notification. Using soap or other dispersants on a sheen is prohibited without Coast Guard permission. Crew should know the procedure before the nozzle goes in.
Fueling Before an Offshore Passage
For crossings to the Bahamas or longer runs along the coast, confirm fuel availability and specification at your destination before departure rather than assuming it. If the yacht will be shipped or trucked rather than run, our guides to transporting yachts and yacht transport along the U.S. East Coast are worth reading.
Diesel, Renewable Diesel and Hybrid Options
Diesel remains the standard fuel for yachts in the size range most buyers consider, valued for its energy density, range and engine life. Renewable diesel (HVO) is the most practical near-term alternative: Volvo Penta has approved HVO for its diesel engines as a drop-in fuel, and some other engine makers have certified selected models. Availability varies by region and it typically costs more than conventional diesel, so confirm approval for your specific engines first.
Hybrid diesel-electric systems appear on some new builds, and hydrogen fuel cells on a handful of very large projects. For most buyers today, the practical question is how efficiently a conventional diesel yacht is designed, equipped and operated.
How to Reduce Yacht Fuel Consumption
The biggest savings come from how the yacht is run, followed by how well it is maintained.
| Measure | Why It Helps | Typical Effort |
|---|---|---|
| Cruise at displacement speed on longer legs | Largest single reduction in fuel per mile | None beyond time |
| Keep hull and running gear clean | Fouling increases drag | Scheduled diving and bottom maintenance |
| Match generator size to actual load | Avoids running generators inefficiently | Planning; possible equipment changes |
| Carry only the fuel and water needed | Less weight to push | Voyage planning |
| Maintain engines, filters and propellers | Keeps engines near designed efficiency | Routine service |
| Plan routes around weather and current | Avoids fighting head seas and adverse current | Planning |
Cruise at an Efficient Speed
The Grand Banks 85 covered about 1.00 nautical mile per gallon at 9 knots versus 0.37 at 21 knots. On a relaxed passage with no schedule pressure, the throttle is the most powerful fuel-saving tool on board.
Keep the Hull Clean
Research on commercial shipping shows how costly fouling can be: a slime layer as thin as 0.5 mm covering up to half a hull can raise emissions, and therefore fuel use, by 20 to 25 percent, depending on the vessel and speed. Yachts are not cargo ships, so treat that as a sign of scale rather than a precise yacht figure. In warm South Florida water, growth builds quickly on hulls, propellers, shafts and pod drives.
Reduce Unnecessary Weight
Carrying full tanks for a short coastal run adds weight you pay to move, and the same applies to full water tanks, unused toys and stores. Balance this against a proper reserve; weight savings never justify cutting the safety margin.
Maintain Engines, Filters and Propellers
Worn injectors, dirty filters, damaged propellers and incorrect engine settings all raise fuel burn. Following the manufacturer’s service schedule and inspecting propellers after any strike keeps consumption close to the yacht’s baseline. Our overview of yacht engines offers more background.
Manage Generator Load
A 25 kW marine generator rated at about 2.23 gallons per hour at full load may use about 1.17 at half load. Generator manufacturers also caution that both underloaded and overloaded generators cause problems and waste fuel, so run the right generator for the actual load rather than the largest one aboard.
What Buyers and Sellers Should Know About Fuel Consumption
For Buyers
Start with how you will actually use the yacht, not how you imagine using it on the best possible day. An owner planning relaxed Bahamas cruising at 9 to 10 knots may be better served by a different hull than one who wants to reach Bimini in under three hours. Our guide on what yacht buyers should consider walks through that decision more broadly.
When you get to the sea trial, these are the questions worth asking:
- Can we record RPM, speed and fuel burn at several settings during the trial?
- Are there fuel logs or fill-up records from recent seasons, including generator hours?
- How many hours are on the engines and generators, and what does the service history show?
- When was the bottom last cleaned and the running gear inspected?
- What was aboard during the trial in terms of fuel, water and passengers?
A professional yacht survey, often paired with a separate engine survey, is the place to verify these points. Sea trial and survey contingencies are written into yacht purchase agreements, so understand those deadlines before signing. Working with a buyer’s yacht broker keeps the process organized, and our used yacht buyer tips cover the steps in order.
For Sellers
Buyers increasingly ask for operating data, and a seller who can provide it answers questions before they become objections. Keep maintenance records and fuel logs organized, and have the bottom cleaned and running gear checked before a sea trial so the yacht performs as it should on the day. Our guides on how to prepare your yacht for sale and tips for selling a yacht cover the rest of the preparation.
Buying or Selling in South Florida? Put Real Operating Data on Your Side.
Whether you are comparing yachts or preparing one for sale, fuel consumption is one of the few running costs that can be measured before closing. Andy Kniffin, CPYB works with buyers and sellers from Fort Lauderdale and can help you set up a sea trial that answers the questions that matter. A conversation costs nothing.
Conclusion
Yacht fuel consumption is less a fixed number than a set of choices. Hull type sets the boundaries, and speed, load, maintenance and generator use decide where a given yacht lands within them on any day. With diesel prices elevated in 2026, the difference between a 10-knot and a 25-knot passage is no longer a rounding error in an owner’s budget.
The practical approach is to measure rather than assume. Record your yacht’s burn at several RPMs, log fill-ups and generator hours, and plan passages with a genuine reserve. For buyers, that same discipline belongs in the sea trial and survey, where fuel data can be verified before the numbers become your own.
AK Yachts is based in Fort Lauderdale, at the center of the South Florida yachting market. If you are weighing yachts with very different running costs, or preparing to sell and want your operating data to work for you, we are glad to talk it through.
Frequently Asked Questions About Yacht Fuel Consumption
How much fuel does a yacht use per hour?
A displacement hull moves through the water, pushing it aside, and is limited by hull speed (roughly 1.34 times the square root of the waterline length in feet). A planing hull generates hydrodynamic lift at higher speeds, allowing the boat to rise and skim on the water surface, reaching much higher speeds at the cost of greater fuel consumption. Displacement hulls are more fuel-efficient; planing hulls are faster.
How much fuel does a 50-foot yacht use?
A semi-displacement hull bridges the gap between the two extremes. It sits in the water at low speeds like a displacement hull, but generates partial lift as speed increases without fully climbing out of the water the way a planing hull does. The result is a hull that can travel faster than a displacement vessel with better fuel economy than a planing hull, making it a popular design for mid-size motor yachts.
How much fuel does a superyacht use per hour?
Displacement hulls are the most fuel efficient at their cruising speeds. Displacement yachts are typically 1.5 to 3 times more fuel efficient than comparable planing boats. Semi-displacement hulls fall in between. That said, fuel efficiency comparisons should always be made at similar speeds: a planing hull running slowly in displacement mode can be reasonably efficient, just not at the speeds where it is being used as intended.
How many gallons of fuel does a yacht hold?
Yes. Trawlers are among the most common displacement hull vessels in the recreational boating market. They are designed for efficient long-range cruising at low to moderate speeds, typically 8 to 12 knots, and are among the most fuel-efficient motor yacht designs available. If you are interested in long-range cruising or liveaboard use, browsing trawlers for sale is a logical starting point.
How far can a yacht travel on a full tank?
Nearly all of them, yes. Sport fishing yachts need to reach fishing grounds quickly and be responsive when fighting fish or repositioning on a school. Planing hulls deliver the speed and responsiveness that tournament and offshore fishing demands. Sport fishing yachts for sale are almost universally built on deep-V planing hull designs.
Is marina diesel more expensive than road diesel?
For extended offshore passages where range, fuel efficiency, and comfort in rough water matter most, a displacement hull is generally the strongest choice. For buyers who want faster transits without going to full planing, a semi-displacement hull offers a practical compromise. The right answer depends on how far you plan to cruise and how much speed matters relative to operating cost and ride comfort.
What is the most fuel-efficient speed for a yacht?
Technically yes, but not efficiently. A displacement hull can be pushed beyond its theoretical hull speed with enough power, but the power required increases sharply while the speed gain is minimal. Fuel consumption becomes very high and the boat is not operating in its design envelope. For occasional short bursts this can happen without damage, but it is not how displacement boats are intended to operate.
Which hull type is most fuel efficient?
Technically yes, but not efficiently. A displacement hull can be pushed beyond its theoretical hull speed with enough power, but the power required increases sharply while the speed gain is minimal. Fuel consumption becomes very high and the boat is not operating in its design envelope. For occasional short bursts this can happen without damage, but it is not how displacement boats are intended to operate.
Can a yacht run on renewable diesel?
Technically yes, but not efficiently. A displacement hull can be pushed beyond its theoretical hull speed with enough power, but the power required increases sharply while the speed gain is minimal. Fuel consumption becomes very high and the boat is not operating in its design envelope. For occasional short bursts this can happen without damage, but it is not how displacement boats are intended to operate.
