who is running MRL (BAM) Lifters without lifter bore sleeves

I think there are some european hot rod cars that use greater than 20-50
I was just thinking that we could really test the oil theory
I find that 0W-40 eurospec oils tested better for wear than 20-50 or Castrol Syntec 5W-50 that I used for years
most of that wear is at start up till you get warmed up
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