Toffen,

I definitely saw a difference in my FlexFuel HHR. I never did a penny-per-mile- comparison, but the milage fell off a cliff when I filled up with E85. Probably something like a 25-30% loss, if memory serves.

Thanks. Brad.

Yes and no.
Gasoline has more BTU's than Ethanol by volume, so you would technically, need less NON E10 fuel to make the same power. The 98 RON has higher flash point than the 95 RON and may not burn as completely. I doubt you will see any noticeable difference in a boat. In a car driven under identical driving conditions, it might be a 2-3% mpg difference with E10 running the same octane. Now if you run E85, the mpg difference is about 20-25%.

If I remember, you have a 450R, so the it requires 89 octane/93 RON. Not sure exactly what RON fuels you have available. Anything above the 93 RON is fine for the engine and it can run on E10. My concern running E10 is the fuel tank and the rest of the fuel system. E10 attracts water and can get phase separation when stored. Ethanol is also classified a solvent and is hard on rubber fuel lines.

You will get better mpg with non ethanol fuel vs ethanol fuel IF the ecu is running in closed loop. Open loop it should get the same mpg.

That`s the right question. 3-4% vs gas price increase .

Ethanol contains about one-third less energy than gasoline. So, vehicles will typically go 3% to 4% fewer miles per gallon on E10 and 4% to 5% fewer on E15 vs 100% gasoline.

I personally love ethanol, 20-30% lowers Intake air temps significantly and has much better detonation resistance.
Always thought I had more engine problems in LOTO with 100% gasoline, that I thought was so great .

I've heard of the dissolved resins in the fuel end up coke'ing up on the intake valves really bad.

The whole ethanol in fuel is a complete failed experiment.

With your setup and blowers, E85 is a real benefit to you and the performance engine scene.

I've only seen it in 2 fuel stations locally, and they're 60 min drive away. Not really an option for me.

I'm happy I can get non-ethanol marked fuel in 91 Oct.

Interesting about your non-ethanol issues.

Can you explain this statement?