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Fuel Octain XC90

posted by  james_a_sousa on  Wed Nov 30 22:48 CST 2022
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last visit: Thu Oct 23 18:51 CST 2014
[RELATED]

Do you know what happens when you step on the gas with low octane fuel?

The cars computer delivers a large gulp of extra fuel! This cools the cylinders and stops pinging.

The car cannot immediately change the timing, besides the pinging occurs BEFORE the plugs spark.

I got fooled by a french gas pump and got a tankful of very low octane while traveling through Canada.

That tankful got 5 MPG less than all the other tankfulls from Massachusetts to Minnesota and back again.

Does your timing change permanently, or does the process occur again and again?






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