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Message: <blockquote data-quote="brianthorekjr1980" data-source="post: 1583797" data-attributes="member: 579884"><p>climate does attribute to the best oil in warmer climates 10/40 i recommend penzoil remember in colder climates you should run 10/30 i have been building engines for 20 years and found the best overall outcome with penzoil ,mobil 1 is your best syn oil but the seal tolerances in your engine tend to let oil by them with the detergent in syn oil i would not recommend it .</p></blockquote><p></p>