Originally Posted By: Olas
Is there a certain power density, or bearing clearance, or some inherent design feature to allow/necessitate xw20?
If it lubricates as well as some posters here claim why isn't it used more in Muscle cars? My owners manual specs xw20 in sub zero temps, but 30s and 40s above freezing - most US guys run xw20 in warm weather, don't they?
I don't imagine a blown big block would be happy on 20s, but it lubricates better?
Also, what difference is there with a positive displacement pump?
I get what you are thinking, I really am, but I don't see the be-all-end-all stopping with what muscle car owners put in their cars as a general guess of what everyone buys.
Additionally, I don't know what you're expecting, but you're probably not going to get someone to build 10,000 engines with/without PDPs and boost-defeating turbos, and unicorn weiner injection systems. Sorry to break it to you.