Quote:
Originally Posted by loobie
Your mpg will be less negating any positive savings. The compression is the factor requiring the octane. The higher the octane the slower the gas burns and the more power you get.
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Well said!
Case in point: my 2006 nissan altima 4 cylinder got 27 mpg on a 64 mile round trip from Columbia to Jefferson City on 87 octane. I use 91 octane and get 31 or more on good days! That's good enough for me
. I have only used premium, even in cars that don't require it. Cheaper than replacing or cleaning engine components. Better mileage offsets the price difference. Now, I have never owned an American car, so I can't speak to them. Japan and German only.