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BTW, I've had a K&N air filter on my truck for quite a while. The K&N's on my car and truck both seem to be filtering well.

I'm very pleased to see how well it held its viscosity. I was surprised to see it at the upper end of a 30-wt. oil. If I wasn't getting such a hookup on Redline I would've definitely gone back with Castrol and tried 4,000 miles. We'll see how the Redline 5w-30 looks after 5,000 miles. FYI, I...

3,250 miles, majority highway driving...14,500 miles at time of oil change Results (ppm/%) Comment Wear Copper 66 elevated, new break in wear Iron 6 Chromium 0 Lead 9 Aluminum 4 Silicon 12 Tin 1 Additives Molybdenum 52 normal for castrol Sodium 0 Magnesium 6 Zinc 883 Potassium...

I'd be very interested as well.

Actually this was NOT the first time to use Royal Purple. I changed over to RP at 5,000 miles from Castrol dino 10w-30, and I've only used RP since then. This is just the first time that I've had it analyzed.

Thanks for the great info and insight guys! This really does help me out. On the next go-around with oil changes, I will probably try RedLine in my SS and maybe Schaeffer's in my truck? I'm definitely going to have the Castrol that I just put in my truck analyzed at the end of 3k just to have...

I'm the owner of the SS that had the analysis done, and I'm honestly disappointed with the results. It was close to three months and right at 1,250 since the oil and filter had been changed, and to see that it was already close to becoming a 20 wt. oil is disturbing! I shift the car at 6,800...