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Mark Ugrich · 09-06-2012, 04:04 PM

From David Canitz @ Royal Purple. Drag race oil recommendations

We recommend the XPR 10W40 if your main bearing clearances are > 0.0025

We recommend the XPR 5W30 if your main bearing clearances are 0.0025.

We recommend the XPR 5W20 if your mains are in the 0.002 or less.

09-06-2012, 04:04 PM	#10
Mark Ugrich Member Join Date: May 2011 Location: Auburndale,Florida Posts: 220 Likes: 29 Liked 71 Times in 38 Posts	Re: Oil for superstock From David Canitz @ Royal Purple. Drag race oil recommendations We recommend the XPR 10W40 if your main bearing clearances are > 0.0025 We recommend the XPR 5W30 if your main bearing clearances are 0.0025. We recommend the XPR 5W20 if your mains are in the 0.002 or less.