[jhnmdahl]

Originally Posted by Vicar

I'm using Amsoil Synthetic 5W-40 European Engine Oil. This follows the Lotus recommendation. The only drawback is that the stuff is nearly $8/quart...

https://www.amsoil.com/storefront/Se...x?CategoryID=8

This is what I've been using too. I'm not sure it's that much better than other quality synthetics like Mobil 1 or Royal Purple, but Amsoil's willingness to share technical data and test results such as the 4-ball wear test swayed me into their camp.

John