Originally posted by iso50:
Originally posted by Bridge:
I'd be wary about using Amsoil for 1 whole year/25,000 miles.
I wouldn't worry at all, in fact I know a few cars with more than 25,000 miles on Amsoil.
Awesome... I've heard of people leaving their oil so long they have rusty oil filters 
Look at the facts in the link above.... If Ford engineered the Duratec to run on 15w40 you'd put it in at mile 0, not wait 14K for Amsoil to change viscosity.
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