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Installed BE bearings/ARP bolts at just over 102,000 miles on my '08. Decided to change after lead spiked from baseline ~8ppm to ~20-21ppm on two successive 5-6k mile oil changes beginning in the 90,000 mile range.
I changed the oil at 400 miles after they were changed, then again about 4000 miles later and had it tested. Lead dropped to zero on the second change, which is the first time it's had a zero in its life.
The car has just under 114,000 miles on it now. I didn't bother to send a sample on the last change at around 111,000. I'll send one at the next change probs. Will be the most "severe service" the car sees with cold weather and lots of shorter trips during winter.
I'm using Redline 5w50
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