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Off-Topic Discussion
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Question for Jestal
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<blockquote data-quote="C&amp;C" data-source="post: 68379" data-attributes="member: 435"><p>Even though I'm not jestal, I'll take a crack (no pun intended) at explaining how they work. It is my understanding that these high mileage oils have additives that help soften older engine seals and help them swell a certain fraction and help keep oil from escaping through vapor, that either escapes to the atmosphere or finds the combustion chamber and gets burned. Certain engine seals, can over time, harden to a certain degree and may not be able to maintain the tolerance they once may have had. These type engine oils can buy time for older engines but ultimately you can see where this is heading. The oil companies tout 75,000 miles as there magic number but I think engine age, oil change maintenance and sevice life would have a much more profound impact on the engine seals they claim to be helping. Many engines live long an happy lives without these special oils, but if your engine has had a hard life, and the seals have hardened over time, they may actually do some good.</p></blockquote><p></p>
[QUOTE="C&C, post: 68379, member: 435"] Even though I'm not jestal, I'll take a crack (no pun intended) at explaining how they work. It is my understanding that these high mileage oils have additives that help soften older engine seals and help them swell a certain fraction and help keep oil from escaping through vapor, that either escapes to the atmosphere or finds the combustion chamber and gets burned. Certain engine seals, can over time, harden to a certain degree and may not be able to maintain the tolerance they once may have had. These type engine oils can buy time for older engines but ultimately you can see where this is heading. The oil companies tout 75,000 miles as there magic number but I think engine age, oil change maintenance and sevice life would have a much more profound impact on the engine seals they claim to be helping. Many engines live long an happy lives without these special oils, but if your engine has had a hard life, and the seals have hardened over time, they may actually do some good. [/QUOTE]
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Off-Topic Discussion
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Question for Jestal
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