royal purple
09-03-2006, 01:54 AM
#3
Launching!
Join Date: Oct 2004
Location: Chandler, AZ
Posts: 214
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I would monitor fuel mileage, if nothing else than for curiosity's sake. I also noticed a HP improvement over M1, although not much. Some magazines have swapped out all lubricants (eng/trans/rear) and noticed 11RWHP, which is reasonably significant for the minimal cost and effort involved.