what is the mpg at cruise speed on a 29 OL with 2x454 vs 2x496 vs singel engine?

About .5mpg with twins at cruise. If your concerned about gas in a performance boat it's prolly not what your looking for.

Sounds very low. I actually checked my 322 equiped with 502's using the trip meter on my GPS 5 people on board, full coolers and a load of gear I got just over 1.5 mpg.... But Irish is right if you got to ask or worry about mpg with a performance boat you need to rethink your boat choice.

Well I'm considering cruise at 40mph....Hell when I was running 80 I bet I wasn't get .1mpg

I have a 24 with a blower motor pushing 700 hp, never even considered trying to figure out gas mileage. Just fill it up on the way out and fill it up on the way in !! I do have to say my 28 cobalt with a 496 gets great gas mileage and I will try to calculate that one of these days.

Thanks. I know it´s not like driving a Prius but I will by a 29 OL and want to gett the best engine setup for high mpg at cruise because I´m from Sweden and the gas costs like 3 times as much here.

I´m thinking a large singel engine with a charger. The boat is 1200 lb lighter with a single.

Or what do you think, am I wrong?

Sorry bout the spelling...

Boattest.com on my Baja 272 had best cruise around 30mph and 2.7mpg. Twins are gonna be around 1.5mpg at best cruise.
The difference between 454's and 496's would be insignificant. They're both big blocks.

Boats in general aren't known for fuel economy unless it's a sailboat. LOL


mb.

I get about 2.5 mpg in my 29OL with a single 454 mag mpi. And to answer the question... "what's it cost to fill that boat". The answer is: "does it matter?"

You forgot it depends how empty it is.

I think the only difference you'll honestly see from a twin to a single would be the ride of the boat...A 29OL rides better with a single from what I'm told than a twin and probably is a bit more fuel efficient, but honestly to cruise 40 with a single would most likely use more fuel cause it's 1/2 the HP