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I've tried to enlarge the relevant portion of the report. Hopefully its now visible without a microscope...

Sorry, that posted really small. Lead is at 12ppm, while the universal average is at 4ppm.

I've been getting the UOAs for my 2008 Nissan Titan done at every interval. The high lead values keep bugging me. Its always had Amsoil Signature Series 5W-30 in it, along with an Amsoil filter. Oil change intervals have been right around 10k miles. The type of driving it sees is long...

Originally Posted By: KernelK If indeed it is a 10w-40 grade, I suspect it is the high mileage oil You are correct, this is the M-1 10W-40 high mileage oil.

Originally Posted By: sunruh thanks for proving my point for me. i enjoy that a lot. no really i do. lol Steve - thanks for that! Your needless belligerence amuses me. @ all - I appreciate all of the feedback.

@ JAG: Thanks for the info! I may give RL 10W-40 a try on the next oil change. @ sunruh: Thanks for the feedback. What can I say, I have Van Gogh's ear for music! A few questions about your comments - 1. 10W-40 is not only the oil recommended by the manufacturer, but it is also the one that is...

Originally Posted By: JAG I'd try something else, probably Red Line 10W-40. Do you know what the oil temps. are while racing? I don't, but the next track day is coming up on 03/31, so I'll be sure to check then and report back. I'll also do some research on Red Line 10W-40 - thanks for the...

A bit of background on this bike: I slowly started turning this 2007 SV650S into a track bike last year, and as a result, a significant amount of track miles are included in this interval. Track duty is rough on an engine, and the high metal counts attest to this. I assume that the slightly low...