I have done a search on here looking for some oil analysis reports for a high mileage LS1 and haven't noticed any. All the reports I see are for LS1 powered cars with 5-15k miles or less on them. The motor is still breaking in at that point. Is there an analysis of a higher mileage vehicle...say 50k+ miles on it that I can check out? I currently have 74k miles on my car and just switched from Mobil 1(which I wasn't very happy with) to Redline, so far I have 3k miles on this oil and I can definately tell a difference. I am just going to do a filter change(K&N Filter) and my quart of oil and go another 3k miles. At that point I think I might do an oil analysis just to see what it looks like since as far as I can tell nobody else has done one on a higher mileage vehicle. I am obviously new to this board....I have been reading it occasionally for the past 6 months or so, but just registered today.