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Message: [QUOTE="Clem1226, post: 1180573, member: 1087"] I ran DELO 15/40 the first 370k or so miles with zero issues, switched to T6 for winter when I started getting romps on cold starts a few years back but had issues with sheer after anytype of hard use ( towing, Bay Area traffic etc). Basically after I beat on the T6 at all my idle would go all "big cam'ish". So I bit the bullet and choked down $120 dollar oil changes with Mobil 1 5/40. No complaints with its performance. Then a few weeks ago I was buying supplies for a change and Delo 5/40 full synthetic was on sale for $16 a gallon and so far so good. I have 438ish on factory sticks (have never had a valve cover off) and she still fires up in -10 degree weather on the first try without being plugged in. MPG is consistent AT 15 to 19 depending on stop and go or mostly freeway. [/QUOTE]

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