12:8 compression ratio and the 32to1 gives better protection with ported saws plus better ring seal. I can say from my saws running H1r at 32:1 when they are torn down have a very nice oily film coated on everything with little carbon buildup at all.
Hmmm 12:8 ? That would be 1.5? Or do you mean 12.8 to 1?
I cannot agree with your statement concerning "protection" nor "ring seal", using 32 parts of fuel to ONE part oil.
I have raced dirt bikes and ran saws > 40 years, no oil problems at 50 parts fuel and one part oil, using Golden Spectro. And that includes my chainsaw miil using 066 and 056 heads.
P.S. I still have a 69 350 chevy LT1 block with shaved deck and heads. It might be 12.8 : 1 comp? About 210 average on the 8 for psi cranking cold.