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Look Mobil 1 is the only way to go. Read that data on the bypass in a fram filter. If your oil pressure reaches above a set PSI the fram closes off and all oil is diverted. Not being cleaned. Same with STP and AC Delco. I will look into more data and find you what I read. I use Mobil 1 and and get around 6 to seven thousand out of every oil change. Their is hardly any discoloration between oil changes either. I can not do that with any other oil and filter combo.
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