Quote:
Originally Posted by ac223mal
I am watching this thread, to see what the outcome is. I am not having problems yet, but I only have access to 91 octane gas in my area as well. According to the owners manual you only need 91 octane or higher, so I dont understand why the car would be tuned for 93 octane from the factory. Like Six.TwoSC mentioned, I wouldnt have purchased the car if it need 93 octane, or had to rely on Torco to get the car to run correctly.
We also have the 10% ethanol blend here (I believe most high pollution area have a 90/10 blend in the summer). If that is really the problem, then most Z's would be suffering from this problem.
Very interested...
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That PDF you posted was very useful.
When I look up ASTM standard D4814 mentioned in that PDF as the required guideline for gas to be used in our cars, seen
HERE in Section 1.8 (D), it clearly says 1-10% ethanol is okay. However the GM Tech is saying its not.
EDIT: btw - this proves that California's crap gas needs to be supported by the ZL1 because the manual says so.
You sir have armed me with a legal contract! Thank you!