Oil brands for severe use, and racing?

[Ant]

CSX4027
What you say sounds sensible Mobil 1 is readily available everywhere, I think Pennzoil Racing 25W50 is available here in NZ!

I have been reading up on Amsoil, and have used some of their oils in the past when I bought a car already on it, that car still seemed to need a top up after 6500 miles, and I put the same car on Mobil Super 10-40 mineral and it does 8500miles before it needs a top up! They claim that their oil is better than every other oil on the planet, the tests are with Amsoil 2000 20-50 Racing synthetic oil, which they say has all the additives for road use, below is some oils from Amsoils comparison this can be viewed at

http://www.tnsynthetics.com/dyno.htm

1)_____ AMSOIL
2)_____ BP Visco 5000
3)_____ Mobil 1
4)_____ Mobil 1 (difference being price)
5)_____ Hi-Tec HTO
6)_____ Shell Helix Ultra
7)_____ Royal Purple
8)_____ Castrol R
9)_____ Castrol SLX
10)_ Torco”
synthetic etc

I find their claims are becoming unbelievable as everything they do or have ever done is better than everyone else, including major oil companies, and companies like Castrol that have invested millions into research etc. How can their oils be always better in every facet of the testing than all others, I find it could be Bull****! - and would be interested in others opinions on this company claims and products, as they are always naming all the other oils that are inferior to theirs.

Ant