Sorry I have a opinion.No I am not carrying water for Amsoil.I have used MB1 in the past,and I learned that if a engine has a leak,MB1 will find it.I don't have ANY experience with any other oils so I didn't comment good or bad. The SS says 25k under regular use(I would not)I will stick with...
Been reading for years,just joined today.Been using Ams for 30+ years. Bought a 84 Buick in 88 w/ 75k miles w/ GM dealer OC since new.At time,no garage,OC in snow,wanted longer OCI.MB1 and Ams was about all on market at time .Cork gaskets were not MB1 friendly in early days.MB1 shrunk cork,Ams...