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fielderLS3 · 04-26-2010, 05:03 PM

Burning ethanol has the effect of increasing octane, not decreasing it. If anything, the Sunoco 94 with 20% ethanol is probably 91 octane gas, and the ethanol raises the overall octane to 94.

Also, are you sure there is a 20% ethanol content? I don't think non E85 cars are rated to run on anything about 10%. (at least in the US, I'm not sure if things are different in Canada). If it were my car, I'd use gas with no ethanol anytime I can find it. A 20% blend may effect your warranty.

04-26-2010, 05:03 PM	#2
fielderLS3 Drives: 2016 Mazda6, 2011 Mustang 5.0 Join Date: Mar 2010 Location: Portage, Wisconsin Posts: 4,049	Burning ethanol has the effect of increasing octane, not decreasing it. If anything, the Sunoco 94 with 20% ethanol is probably 91 octane gas, and the ethanol raises the overall octane to 94. Also, are you sure there is a 20% ethanol content? I don't think non E85 cars are rated to run on anything about 10%. (at least in the US, I'm not sure if things are different in Canada). If it were my car, I'd use gas with no ethanol anytime I can find it. A 20% blend may effect your warranty. __________________ 2022 1SS 1LE (Arrived 4/29/22) "The car is the closest thing we will ever create to something that is alive." . 2022 1SS 1LE (Coming Soon)