I use Valvoline VR-1 10-30 Conventional.
Although lengthy this article has some enlightening tests results and cautions toward adding aftermarket
oil additives, max ZDDP levels, racing
oil ZDDP levels on the street, etc...
Section 11, has the main
oil results.
https://540ratblog.wordpress.com/201...-test-ranking/
Joe Gibbs Oil has some strong feelings about the film strength testing the industry performs and I can understand the simple one arm bandit type test (used in article above). Although not truly indicative of all the areas an engine subjects oil to, it does give a cheap "apples to apples" test, VS funds required to support a NYC Cab operation wear test or a slew of test cell engines running on dynos at varying load/speeds for weeks on end.
http://www.drivenracingoil.com/news/...y-oil-testing/
And a side note for those switching to Diesel oil
http://www.drivenracingoil.com/news/...el-oil-changed