Quote:
Originally Posted by euromodder
Ethanol content and quality will affect MPG
The expensive premium grades that some companies like to advertise - like Shell's V-power - have been tested here in Belgium, and while they actually do offer a slight MPG advantage, this simply doesn't offset the equally premium price for it.
(Premium petrol works better to reduce MPG, than premium diesel BTW)
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Shell sucks(happened at several stations in town 3 of 3 stations 3 of 3 arco stations as well what a good scam) i only get 87 US out of the premium 91 octane pump as noted by the timing advancement table drop to 87 level. which is near 0 sometimes negative .
I do go to Chevron or mobil only No where else (unless it's a rental then it does not matter i get the cheapest **** i can find)
with 91 us octane I can see as high as 42 degrees advancement
it's VVT btw
it's normally on summer gas for the 91 oct so it's normally worth it(it's worth 1-2mpg more )
3.399 = 0.183cents per mile(18.5MPG)
3.859= 0.154-0.139 cents per mile (25-27.6MPG)
So regular fuel will cost $4.58-5.05 per gallon (25-27.6MPG equivalent. )
the inverse is at 2.89 a gallon at shown prices above