Quote:
Originally Posted by LAP1DOUG
Personally, I would (and did) go for convenience, and head on down to the local auto parts store where they have a great selection of excellent hypoid oils. I like Valvoline Synthetic combined GL-4/GL-5 rated. Don't get just a GL-5, get the combined rating.
As I understand GL-5 is the best for ring & pinion gear loads, but GL-4 is best for synchonizers. With a transaxle like we have, you would like to have a combined rating.
Also, if you have a torsen type limited slip, you probably don't want the Royal Purple or Red Line super exotic type oil that has some kind of friction reducing semi-solid beads in it. As I understand, that can reduce the effectivness of the limited slip.
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I put this in in January then read all the you won't be able to shift in the cold warnings. It was recommended by a person who track a car 6 to 7 times a year, and is connect to a dealership . It worked the same as the old oil. I felt no change. The 03 most likely had the Mobil PTX in it from new
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2003 Black 986. modified for Advanced level HPDE and open track days.
* 3.6L LN block, 06 heads, Carrillo H rods, IDP with 987 intake, Oil mods, LN IMS. * Spec II Clutch, 3.2L S Spec P-P FW. * D2 shocks, GT3 arms & and links, Spacers front and rear * Weight reduced, No carpet, AC deleted, Remote PS pump, PS pump deleted. Recaro Pole position seats, Brey crouse ext. 5 point harness, NHP sport exhaust
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