amsoil

Hello all, I have been going through my truck changing all fluids. The plan was to change the front diff to Amsoil Severe Gear 75w90 (same as rear diff), but I ordered one too few quarts so I bought a quart of Valvoline to make up the difference. From my search on BITOG, it looks like this mix...

One thing I’ve not been able to find any information about is the Amsoil Severe Gear forming an iron sulfide layer on parts. Does anyone have any additional information on this? I currently use Amsoil Severe Gear as I know it’s a great gear oil, but I’m curious to learn more about iron sulfide...

Coming from the world of Subaru, owner of an FA24 motor. I wanted to ask the ultimate motor oil question. The battle between the two best of the best. Tom Brady vs Michael Jordan. Who wins? Who's better? Who is the greatest of all time?

this was also posted in the “what are you doing today” thread, but it will have more future value I think, over here. Copy: ************ 2015 CRV, (CVT), 5 qts of ATF drained/filled. 85k miles. This was interesting. CVT had drain/fill at 50k with Honda hcf-2. No issue, no change in any...