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Old 06-29-2020, 12:05 PM   #15
IneedAZ


 
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Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr
Join Date: Mar 2009
Location: Tampa
Posts: 5,111
Quote:
Originally Posted by 95 imp View Post
Seriously doubting that stuff does much good at such a low volume, unless it has lead (which it doesn't).

You'd need 3 gallons of 117 octane fuel (xylene) to bring 15 gal of 91 up to 95 octane

If there were such a thing as an unleaded 129 octane additive, you'd need 1 gal to bring 15 gal up to 93 octane.
for me, i am using smaller volume mixed with 93 just to help with the occasional bad gas. Seems to me that the car is more consistant. I will probably double the amount i put in when the car mods are done. Again, it will be tuned for 93. I am adding it as a buffer, not to adjust my tune.
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