Oh, my bad. I thought you were talking about something else. I was going to suggest backing off the cabbage, boiled eggs and beer. I guess you're talking about a different kind of "rotten gas".
Seriously though. I do have 1, exactly 1, station where I can get real gas; no methanol. I feel confident enough in attaining the same results 4 times straight that I can tell this with a reasonable amount of accuracy.
With the good ole 10% (or more - many dealerships find 15% to 18% when testing for warranty claims under engine issues on cars) methanol gas in my '06 Acura TL, I get 28 MPG on a round trip to specific accounts in Indy. Every single time, by on board computer
and by hand calculation, I get 28 MPG.
Using the straight gasoline (same required 93 octane), making the exact same run to the same places and keeping cruise at the same speeds as best as I can tell, I get 34 MPG each time!! Well, one time I got 33, but I was almost trying to set a land speed record getting home because of my daughter's health. Still, I'll take 33 MPG when the GPS shows a top speed hit on that trip was 136 mph!
Anyway, I'm no Einstein, and have never claimed to be, but that seems to rather clearly demonstrate a whopping 18% increase in fuel economy when running "real" gasoline! To me, that's HUGE! Also, addressing Big Al's other gas issue, I've forgotten Stabil in some of my lawn mowers and string trimmers (hell, I literally have dozens of small engines - you know I'll miss some), yet I've never once had any bad gas related issues in any small engine since I only run the 93 octane "real" gas in my small engines.
Waybomb will understand big time why I'm not putting anything else in my 502ci and 572ci big block toys. There's an awful lot of money on the line if one of those grenades due to a gas problem. Heck, it's almost impossible to find any "real" carb tuners anymore. Being a carb magician is pretty well a lost art anymore. The smallest speck of dirt or one jet size off makes the difference between a tire smoking beast and a plug fouling machine that makes you scream profanities.
FWIW, I do use PowerService
and Stabil in my 550 gallon diesel tank. I don't bother with any additives in my 290 gallon diesel tank or the 90 gallon diesel tank in the bed of my pickup. I only keep gasoline in 5 gallon sealed "jerry" (sp?) cans; and I only have 4 of those cans. They are costly, (new production, not military surplus) but they just flat don't leak (even stored upside down - my son did that for me) and they never dribble with the spouts on them.