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Old 09-09-2010, 05:54 AM
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mbdougl mbdougl is offline
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Join Date: Feb 2004
Location: Annapolis, MD USA
Posts: 365
mbdougl is off the scale
Default Re: premium unleaded

The 6.2L has a compression ratio of 10.5:1 vs the 6.0L which has a 9.4:1 ratio so I can understand why the newer trucks recommend premium fuel.

I am happy I can run on regular because it is $.30 more per gallon for premium now! That would be almost $10 more per fillup.
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