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19 years and 17k posts...
Join Date: Jul 2002
Location: Dearborn, MI (Southeast Michigan)
Posts: 17,444
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I've used Amsoil exclusively for about 5 years now and I have been very happy with it. I ran Amsoil 20w50 on the 911 and I run 5w30 on the Mazdaspeed3. We run it in our son's 2002 Ford Focus with 200k miles on it. Heck, I even run it in our lawnmowers and everything else that uses oil.
I use Amsoil 75w90 synthetic gearbox fluid in the Speed3 too.
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