We have had detonation in a few Ford 4.6L engines. Is this an octane issue?
The AERA Technical Committee offers the following information on replacement pistons for 1991-2002 Ford 4.6L VIN W, X & 6 engines. This family of Ford engines is very sensitive to an increase in compression ratio whether the increase in compression is from carbon build-up in the combustion space or changes in dimensions.
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