I thought it would be quick and easily to google for:
gasoline octane btu
and get the answer, but it's not. Anyway, I'm pretty sure that BTU content doesn't vary by octane rating, except as a result of the gasoline being diluted by whatever was used to raise the octane.
The reason higher octane rated gasoline can produce more power (or, in certain conditions, can produce more mileage) is because it can be used at a higher compression without pre-detonating. That allows the existing BTU content to be extracted more efficiently.
Edit: Simultaneous posts....dude, the gas you got was defective or contaminated, or coincidentally you've had a malfunction. Ask them if anyone else has been complaining about the 91 that they got that day.
exactly, higher octane lets you go up in compression thus = more power outa said engine.(hence why race engines use race fuel that is like 105 octane if not more)
i also concour the gas is bad, weiher it be water or dirt
I've never had premium give problems even on my 87 chevy s10. but then I run everything pretty advanced on the ignition.
bad gas gets my vote
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
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