For EVO's there is only one oil - Penrite 20W-60 Diesel. John Rooth/West has done nearly one million EVO klms on the stuff.

I'm going to use Penrite MC4 20w-50 full sin in the engine, Penrite MC4 10w-50 in primary & Redline heavy shock-proof in trans, I hope this will be ok

After reading a post on penrite with Zinc a while back I decided to give it a try  I have always used Sync 3 oil & always at the 4-5k mark when a change is required its as black as...this time used Penrite ten tenths 20 - 60 full synthetic with zinc , in Primary as well. now at just over 5k the oil is still pretty much the same color as it went in ,thats got to be good proof !.. for me Im covinced, have bought another one ready 

Gonna change to synthetic and give this a go.