Well here is the link that reports the results of independent tests done by some car nuts on
Mobil 1 and AMSOIL. They have not completed their testing of AMSOIL yet but initial reports indicate that AMSOIL gives better initial wear results than the Mobil 1. Note that AMSOIL IS formulated differently from Mobil 1 to reduce wear....
"We note that initial wear is significantly reduced from the Mobil 1 sample. Is it the oil at work, or just the natural aging of the engine? Time will tell, we suspect. The first 3,000 miles showed the most wear on Mobil 1, so if Amsoil can buck that trend then it will hold a significant advantage in the long term. Also note that even with over 30,000 miles the copper is still crazy high (hello GM, do your cams ever break in or what?). Insolubles once again jump immediately to 0.3%. If we had to guess, we'd say this is the limit of the filter's abilities, and we're not likely to ever see better than that. Viscosity dropped a bit, something Mobil 1 didn't do, but it remains significantly higher than Mobil 1's viscosity at this stage. Round one, advantage: Amsoil."
It will be interesting to see how the tests turn out.. I hope they put their mileage on the car before the 12 month warrenty on AMSOIL expires..
AND: The AMSOIL SAE XL-7500 series oil is only 5.20 a quart. But it is formulated for 7500 miles or 6 months..
I know of no oil company that disputes AMSOIL's oil comparison testing of the leading oil brands. It breaks down to what you want to pay and how much you value your cars performance.. You decide..
