Part of the additive that goes into the UK blend of Optimax is some sort of plastic.
It allegedly acts as a lubricant and detergent so it suggests it is really for engines using an exhaust valve and and inlet valve a'la 4 stroke.
However, most modern strokers use a power valve of some sort so possibly an aid there.
Also, being a stroker, the bottom end takes a load so again, perhaps a benefit there.
Speaking to Bob on fuels and fuel suitability a while ago I got the 'full monty' discussion. He made it clear that alot of what you get advised on is rubbish and that pump quality fuel these days is pretty dire.
You need the octanes in a high performance stroker, to stop pre-ignition, detonation and the cleaner running seems to come from having the lead there hence why 4 star is the true go go juice.
Every stroker I've tried this on ran cleaner and felt better on the road as well as helping midrange power - a cleaner burn I assume.
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These aren't the droids you're looking for.