- Mar 25, 2008
- 5,526
- Boat Info
- 2006 Sea Ray 58 DB
- Engines
- MAN CRM V8-900s, Twin Disc Drives; Onan 21.5 Generator
I had a 454 Corvette back in the 70's and that big block would pass anything but a gas station!When we moved from the 350 to the 496 I was really concerned about fuel burn going way up. The 496 actually does better than the 350 did for normal cruising and tow sports because of the better torque. But, once you get above 3,200 RPMs the 496 is a hog. At WOT the 496 burn is about 21 gallons/hour. The 350 was more in the 13 GPH range, IIRC.