While it's true that Amsoil pays a independent lab to run these tests, ( try finding someone else to pay for it) they are, never the less, independent studies.
They test against more than just one synthetic. And other than Mobil One, they are truly significantly better than anything that has been tested. (Or I suppose it's possible that some oils were omitted from the test results, but then wouldn't any other company that is better also pay for testing to prove they are better?)
Amsoil is the first company to develop and sell API certified oil in the world. (therefore the most experience) They have state of the art facilities and QA every batch b4 it leaves the factory.
Everything about Amsoil points to a top quality product. (someone has to be the best) If there is another oil out there that is better then they should open their wallets and pay for some independent tests to prove it.
I'm not saying Lucas (by the way is Lucas a synthetic?) is bad, just that Amsoil is most likely the most technologically advanced lubricant on the market.
If your interested here is lnk for and extensive test paid for by Amsoil.
http://www.amsoil.com/performancetests/g1971/index.aspx
I always try to pay attention to what I don't see, and I don't see any other oil companies paying for and releasing test results.
(yes, I'm recently a dealer, but I felt this way for a while b4 I became one) (And no I'm not looking for a sale)