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Which octane for 2000 Audi A4? ?
I have a 2000 Audi A4 1.8T quattro, I'm supposed to run 91 minimum octane, however no gas station around me sells 91 octane, it's 87, 89, and 93, is it safer to run 93 octane or 89, I'm not sure if my knock
Sensor will kick in for 89 or if the pistons will hold up from the heat of the 91?
John, you obviously know jack **** about cars, if you run 87 or 89 octane through a high performance engine it will cause the knock sensor to adjust for the loss in power, However you will still get somewhat of a knock in the engine(mis firing) basically tearing the engine appart from the inside out, on the other hand, higher grade gasoline burns at I higher temperature, which in turn will burn right through your head gasket and put holes in your pistons, and for the record, the "T" in "1.8T" stands for turbo.. It's the common abbreviation for a turbo charger.
3 Answers
- cimraLv 71 decade agoFavorite Answer
Go with 93 octane, that turbo needs fuel resistant to pre ignition.
-because of the high cylinder pressures generated by the turbo, this engine does not have the leeway to retard the timing like normally aspirated engines do. There are 2 categories, Premium Recommended and Premium Required, the 1.8T is in the Premium Required category. They clearly state 91 octane MINIMUM so 93 octane is perfect.
- Anonymous1 decade ago
93 is the best. they mean the minimum is 91 like you said. but yes 93 is the best of the best