89 octane + 93 octane = 91 octane?
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89 octane + 93 octane = 91 octane?
My car has been backfiring a little bit lately, and I usually run 93 octace, because it's either that or 89 around here. I hear most LS1 guys are running 91. So, if I have half a tank of 93 and half of 89, is that equal 91? I'm betting it is, but I figured I'd ask before my baby is a pile of smoldering metal and plastic on the side of the highway. Yeah...I know it's a dumb question.
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Originally Posted by EchoMirage
thats how they mix the midgrade at the pump. half super, half regular.
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Originally Posted by slikrider20
Can you guys actually tell a difference between the ratings? I put 91 in my tank in then i put in 89 and i can't tell a diff.
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Originally Posted by giant016
I hear most LS1 guys are running 91.
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since this little gas problem latley almost all of the sunoco's around here took there 87,89,93,94 and changed it to 87,89,91,93 .... only one sunoco @ 202 and route 1 in chadds ford has 100 octane pump .... it is sitting around 8 dollars
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Originally Posted by JeevesRules
since this little gas problem latley almost all of the sunoco's around here took there 87,89,93,94 and changed it to 87,89,91,93 .... only one sunoco @ 202 and route 1 in chadds ford has 100 octane pump .... it is sitting around 8 dollars
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Originally Posted by PaulC
im gonna hijack....so whats the maximum octane our cars can run at?
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Originally Posted by Formula413
Don't worry about it, just run premium. You actually want to run the LOWEST octane you can that won't cause detonation. If you don't have any way to monitor knock retard, just play it safe and go with 91 or 93.
91-93 octane is plenty. No reason to use 100 octane in a stock LS1. It will only hurt MPG and do absolutely nothing to help power.