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I'm thinking of using that M1 v-twin on the gear/clutch side. I like that this engine is one that separates the clutch oil from the engine oil. My only hesitation using it on the engine side is colder starts being a 20w though at 100c it's not much different than the 10w-50's. Thanks

@RDY4WAR Is the HPL capable of extended drain intervals? Not meaning exceeding hours or miles but staying in the engine 6 months over winter when use is low. I know some racing oils are just meant for a few track days then replace. Thanks again

Oil change at 25-30hrs, could be a weeks worth of riding or 6 months. I'm going to use that delvac extreme 15w40 or t6 on the clutch side. They seem to work great for that (used them in past on bikes that share engine oil with clutch)

Interesting about relatively low amounts of ZDDP being ok. I looked into the HPL stuff but they don't have as much information on the interwebs as others, I'll keep digging. Same for some of the euro oils (motul, liqui moly) hard to find all the levels of ZDDP, Moly, etc. For those that...

I forgot about Torco. I remember them I think they're a so cal company. I use to race at the Pomona ca drag strip 25-30 years ago with supercharged or nitrous 5.0's. Good times, been in Idaho just over 20 now.

Many motorcycles share the engine oil with the clutch so oils marketed as motorcycle oil can't have high levels of moly/friction modifiers. No doubt good oils but just thinking I could find something that protects even better with this bikes engine oil being separate. Those two you listed are...

Anyone reading this think 120hp/L 10k rpm naturally aspirated engine, no emissions. In case it being a motorcycle causes any confusion. Thanks for the replies so far. What's the typical way people buy amsoil? I know an auto shop by me carries Schaeffers on the shelf. I'll look into HPL as well.

Hello fellow enthusiasts! Been a lurker for years and really appreciate members generosity in posting VOA/used oil analysis. I've learned a lot from this site over the years and would like to lean on the knowledge of others here as well as give back where I can. When I do oil testing I will...