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Originally Posted by Justintoxicated
Im putting in Amsoil, I believe it is far better than Mobile 1 from all the test concerning it I have sceen. THey keep their costs on the same level as other oils but not spending so much on the bottles it comes in, or fancy adds on TV.
However I'm not going to run the 35,000 mile kinda because I plan to change it eveyr 7,500 miles anyways. The 35,000 mile kind is supposed to be better than the mid grade amsoil (25,000 miles) I have sceen tests for showing which was shown to be superior to castrol and Mobile 1. They also only make one grade 0-30 but say it protects far better than a typical 30 weight synthetic.
Now for the average driver this is probably overkill for your oil to be this good, but I'm going to try it anyways since it's only about $1 more than other synthetics.
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Be careful about what testing you look at. A lot of it is sponsored by Amsoil dealers. Not exactly what I'd call impartial.
That being said, someone on this board did a very nice 7500 mile interval using Amsoil Series 3000 0w-30. Wear metals were quite low on a ppm/1000mi basis. I think it was somewhere in the neighborhood of FE 14 and PB 6, insoluables were also low.
That particular oil is actually a diesel rated oil, but has excellent lubricative qualities and a stout add pack. It doesn't meet API/ILSAC specs though because the adds are so high as to be over the maxes that API/ILSAC allows. I do not view using a non-API oil as a problem, however, your dealer may see things differently.
You are smart to not run the oil over 7500 miles for warranty purposes. Even if you do once the warranty is up, be sure to back up what you're doing with oil analysis!