Quote:
Originally Posted by DoubleF
Some of the additives they put in changes your fuel economy (basically ethanol blend differences, stuff that cleans so probably fuel injector cleaner and gas conditioner stuff etc.). I don't know if this is still the same as of today or as extreme as I noticed it used to be up to 5-10 years ago though.
Most people claim it's placebo effect, but when I kinda loosely kept track, it's certainly ended up being one hell of a placebo effect if true. But most people also think that there's completely no difference between regular and premium in a vehicle. There's huge differences (15%+) in the L/100km for regular/premium in many modern vehicles for highway driving. I spend less $ per KM with premium (~7L/100KM) in my Odyssey than regular (~9L/100km).
Esso/Mobil/Superstore should all be the same stuff. At least they're connected in terms of rewards programs.
Husky used to be the worst stuff I could put into my vehicle. Second worst was Co-op regular. Co-op doesn't seem as bad as it used to be though. I remember putting regular into an engine designed for premium (poor student) and it'd knock and shake quite noticeably. The RPMs would flutter while stopped at a light or stop sign.
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Ethanol content in gas absolutely reduces fuel economy:
https://afdc.energy.gov/fuels/ethano...nt%20decreases).
In years past, certain retailers had higher levels of ethanol in their gas - usually the discount brands, so that lead to fuel economy differences.
However, government "clean fuel" regulations are now mandating ethanol content in fuels, so those differences are leveling out:
https://www.canada.ca/en/environment...ons/about.html
Certain blends of Premium from Retailers used to be ethanol free (Shell V-Power), so I could see how that lead to better fuel economy - even if the higher octane wasn't used. Unfortunately regulations have made this stuff a rare bird.