This thread has spun way out of control. All I said that when I asked the builder what he thought I should use, the two brands that were recommended were Amsoil and Redline. I previously used Mobil 1 and changed my oil regularly with it, and was "rewarded" with my rod bearings going at 107k. I WAS NEVER TOLD THAT MOBIL 1 WAS TO BLAME, I CAME TO THAT CONCLUSION ON MY OWN. I would never use Mobil 1 again as a result. I always bought it at Wal-Mart and did the oil changes myself with Mann filters, so I know what I put in.

I've used Amsoil in my 2 stroke stuff and it's always ran great. The shop I work at has an Amsoil rep, so getting it is easy.

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