Has anyone ever used AMS OIL Severe Gear 80w-90? says its a GL5 but works for GL4 applications. stuff is kinda spendy but seems like a decent oil to run. any input?
I have a build that I'm getting close to completion on. Its a 1983 Chevy c30 crew cab originally but has been 4wd swapped and ls swapped by me and I got a nice sm465 and np205 trans/t-case setup and I was wondering what oil I should run. I have a 5 gallon bucket left over of 50w Schaefer oil...