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Put ACES IV before filling gas tank or after?

3220 Views 11 Replies 6 Participants Last post by  370 HEMI
Is there a de facto standard on how to fill the ACES IV in the gas tank?

Last time I did it ACES IV first, then filled up. Seemed like the car picked up on this right away.

This time, I filled up first (completely) and then filled the ACES IV. This time the car seemed to lose pep right away, pulling out of the gas station and driving home. How's that possible...does the computer pick up on the gas octane/quality that quickly?

I use the same Chevron gas station I always use. Also, I'm on my 3rd treatment. First treatment didn't seem that much different (added ACES IV after gas fillup), the 2nd treatment I added CAI, exhaust and Johan tune (he was informed of ACES IV). Car felt really powerful.
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I think I remember Brian saying It doesn't matter. I've done it both ways.

However, it would make sense that if you filled up without adding Aces the fuel would get diluted. If you drove this way for a bit before adding Aces to that fresh tank of gas you might notice a slight difference.
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