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Message: <blockquote data-quote="driftingmustang" data-source="post: 1000158" data-attributes="member: 9799"><p>And what I'm saying is the guy who rebuilt his motor his motor could be a very good mechanic but he is still ignorant to the chemical properties of oil. I just read back through the posts and he said the nationL brand of oil lasts for only a thousand miles. With a break down rate that fast it is high in sulfer, many other things, low in detergent, and could quickly become a weak acid lubricating brand new bearings, rings, cylinder walls etc shortening the life of the motor. I'm no master mechanic by any means but I do have personal expierience and a formal education on engine theory, rebuilding, and history of why engines have improved over the last 100 years. The biggest reason engines last so long now a days is quality of oil. That doesn't matter who your mechanic is.</p></blockquote><p></p>