<in older cars and high performance vehicles....
If you have a stock computer, you should not need to run high octane these
trucks are designed as trucks for hauling and towing from the factory. The
problem could either be with the engine running hot, or with the computer
advancing the timing too much. The 180 thermostat will help either way,
unless it is severe detonation, then its in the computer.
Boog
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