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Quote from: cognos on March 28, 2011, 08:53:14 AM
That site does not provide accurate information. One needs to check with the state/provincial regulations to determine what concentrations of "oxygenates" - and there are more than just ethanol that are allowed - may be actually mandated to be in the fuel you are purchasing. And in many places, such as Ontario, Canada, where labelling is no longer required, but up to 10% of the fuel may contain ethanol. Don't rely on the pump sticker, the station owner, or the truck driver - or some website with questionable sources.
No one should be seeing more than a small drop in mileage using a fuel with 10% ethanol. If you do, something else is up. In a modern engine, you get roughly 2/3 the mileage of a gallon of raw ethanol vs. gasoline. So out of the total gallon you just bought, in that 10% that is ethanol, you would get 2/3 of your regular mileage - so if you were getting 10 mpg on "pure" gasoline, you'd get 9.66mpg on the oxygenated fuel. But the tradeoff may not be even that low - since the ethanol raises the octane number of the entire gallon of gasoline, you engine's ECU may change some operating parameters and you may get the same or better mileage... so it's not just a simple % comparison. And just because the fuel has a higher octane number doesn't means it's "better", or will give your engine more power - unless it's a higher compression, turbo- or super-charged engine that requires premium.
All bets are off at higher percentages of ethanol, unless your engine has been optimized to use it, or if the fuel is "stale" - old gasoline containing an alcohol woll pull moisture from the air. Heat/cool cycles in the tank hasten the process. Wet gas is bad gas...
As far as additives - anti-corrosion, dispersant, detergent, etc. - in consumer fuels - don't get oversold. Almost all gasoline contains exactly the same additives. Oh, sure, they may change the formulations a % here or a chemical there - but they're essentailly equal to each other - and compatible with each other.
Quote from: vdubnut62 on February 10, 2010, 04:16:16 PM
Oh man! That's really gotta suck. I offer my sincere condolences, do we need to send in the St. Bernard with the little keg of Brandy?
If you weren't 600 miles away, I would come give you a ride home.
Ron
At the moment I'm snug and warm........and about ten miles away from where I want to be. Might need the brandy and saint bernard later when I try to get home 
since this morning, and still coming down like something unleashed........
