12-21-2007, 11:08 AM
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Super Moderator
Shift_Obsessed
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Join Date: Aug 2006
Location: Miltown,Florida
Posts: 10,392
Thanks: 524
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Quote:
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Originally Posted by califguy33
Mobil 1 has a drain interval, read the bottle, and they have extended drain oil. I agree you cant trust a report from amsoil saying there oil is the best. I heard somwhere that castol synthetic is one of the worse. You need studies from test companies who dont make oil. I think most synthetics are probally pretty close to doing the samething, give or take a small amount.
mike
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I don't have a bottle to read. I was reading on their website where there was an extended interval oil for 15,000 miles for the Mobil 1 extended performance.. I didn't see anything for Mobil 1 other than the maximum owner's manual recommendation. Amsoil has a 15,000 miles/1 year severe service and 25.000 miles/1 year normal service interval when using their oil filter.
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