UH Emil: You want a V8 and 25 mpg while towing a boat. Maws Vortex might get that if I pushed the car. Race car gets about 12 laps to 100 gals. 88 4x4 gets 12 if I stay in 2 wheel drive. Just a thought if gas mileage is tops try a GM V-6. Had a Olds 98 that got 33 mpg. Good luck if you find the right secret let me know. Going to tow Harley with my 59. popcorn