Quote:
Originally Posted by IMASA
Now it seems Chev 94 is back to its usual crappy self. My last full tank had pretty bad knock in the upper boost/timing ranges. I tried 2 half tanks from different stations in Vancouver and Richmond and both had the same negative results.
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I filled with Chev 94 last week in Pitt Meadows and noticed that my STI pulled its own timing-- had this happen before, and immediately knew it was the shit-tastic gas.
I'm now boosting at wastegate 10psi instead of the usual 17.8psi. The car is a stock STI, and it seems to love Shell 91 over the Chevron 94...