you guys should check out redline oil products. Their products are easily the best, and they have the test results to prove it. I run redline in everything. y used oil after about 15,000 looks better than mobil 1 super syn (what I used to use) after only 3-5,000. give it a try, it's not all that expensive and it's made from the best base stock you can get. the first oil change I will say will make you think that it still looks the same, but it's removing the old deposits and contaminants. I have been using it for about 5 years and I am very satisfied. My xterra only had the original fluids in it for about 6,000 miles. they gave me the first oil change and I figured that 6,000 was plenty long on the regular fluids. now that I'm using all premium synthetics everything seems to operate better. Maybe it's just me, but I think it's better...
