Quote:
Originally Posted by HarryD
I will let others speak to this but as the synthetic oil story unfolded, the definition of syththtic oil have shifted from solely synthetic oils to the inclusion of highly refined petroleum products.
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Nearly 25 years ago, I worked in a "tuner" shop, (we sold wheels and tires mostly), and that was when I was first introduced to Amsoil. It was their contention at that time, that their product was fully synthetic, and that Mobil 1 was from petroleum stock. I don't know if that has changed over the years or not.
I've used Redline gear lube and ATF with good results as well.
BTW, I have the Amsoil V-twin 20=50 in my 3.2 now, and thankfully I haven't seen any leaks.