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Old 12-11-2002, 04:34 PM
Ali Al-Chalabi's Avatar
Ali Al-Chalabi Ali Al-Chalabi is offline
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Join Date: Nov 2000
Location: Knoxville, TN
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It has a 4 valve per cylinder head and a 10.4:1 compression ratio. I think that would equate to a high enough cylinder pressure to warrant premium. Otherwise, the engine may retard the timing to prevent detonation with lower octane gas.
Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record
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