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better mileage with higher octane?

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Posted by dido on January 2, 2007, 1:11 pm

is there any truth to the statement that using a higher octane gasoline will
result in
better gas mileage? I understand that it may have other beneficial properties
anti-knock, acceleration, etc..

how would one calculate such a statement?

for reference, I usually fillup between 16-20 gallons, regular gas is 87 octane,
supreme 92 octane and in our area the price difference appears to be about
between regular and supreme.

Posted by <HLS on January 2, 2007, 1:17 pm

will result in

properties ie.

Dont worry about calculating anything.  Octane rating has no direct
to gas mileage.  Antiknock properties are the key.

Posted by stu on January 2, 2007, 1:28 pm

and just what do you think Octane rating a measure of?

Posted by <HLS on January 2, 2007, 1:50 pm


The octane rating is, just as I said, a number related to antiknock

Posted by Eeyore on January 2, 2007, 2:04 pm

HLS@nospam.nix wrote:

And good anti-knock properties ( higher octane ) allow the ignition to be
advanced which *may* improve engine efficiency. It pretty much invariably
improves performance.


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