The controversy is based on the fact that diesels use less fuel — a lot less. For example, a 300 bhp diesel might burn 17 gallons per hour when wide open, while a similarly powered gas engine would use about 30 gph. Another saving is that a diesel can typically go 5,000 hours before needing a major overhaul, compared with a gas engine, which might last only 1,500 hours. This is because diesels are made to closer tolerances and built heavier. With proper maintenance, good installation and long, steady running times (rather than a lot of short runs), a diesel can give you a lot for your money. However, while diesels use less fuel, the fuel they use is often more expensive than gas. Diesel averages about 20 cents more per gallon in most states. Diesels also cost more. For example, on a Formula 43 cruiser you’d pay about $55,000 more to get twin 300 bhp diesels over the standard twin 375 hp gas engines. Gasoline engines are also lighter, and less weight means less power needed to get on plane.