I always wondered why someone would pay to have oil analyzed when that is 1/2 the $$$$ cost of just doing an oil change ???
Why woukd you want to buy expensive, overpriced oil, pay expensive shipping on it to boot, buy into the never changing it mentality, then take a chance if and when that oil sample comes back bad now it's too late.
Oil is relatively inexpensive compared to a motor. AMSOIL is just AMWAY for oil, JMHO, and I say that because the AMSOIL Dealers are more concerned with signing up people under them as dealers then they are with selling product most of the time.
AMSOIL claims the oil they manufacture is better, but yet they do not pay to test it in a way that the big oil makers do, INDEPENDENT TESTING !!!
If anyone wants to buy AMSOIL products that is their business, it is a free country, but I change my oil every 3-4K, I usually use Rotella T-15W-40, but I also have no problem with DELO-400 or Delvac 1300. I try to stick with Rotella. My 2002/LB7 does not use on drop of oil between changes and idles at 45 psi, runs down the road at 70-80 psi.
In my wife's VW Touareg V8 the AMSOIL the VW Dealer was using was going through the motor like shit through a goose, it would use so much oil that it would go through 6-7 quarts in 10K miles and I would have to keep topping it off weekly, I asked if that was normal and they said yes, I felt like I was getting screwed but I was still under warranty and I had all the proof in writing as to what was going on. It got to be so bad that after I was out of warranty at 60K miles I switched to LUBRO-MOLY and now if I use 1-2 quarts in 10K miles it is alot.
IMHO AMSOIL is not OK at least from my personal experiences and there are far better and less expensive proven, tested oils out there to buy.