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I see a lot of shops in Omaha switching to synthetic oil for everything, but I stuck with conventional in my fleet's older 7.3s and they're running smoother after 50,000 miles.
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rowan6582mo ago
Sticking with conventional oil in those older 7.3s makes sense. Sometimes the new stuff just isn't the right fit.
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rubyshah2mo ago
My old truck is basically held together by conventional oil and hope at this point. The manual might as well be a suggestion written in crayon. If I tried synthetic in it, the engine would probably get confused and just stop out of spite. Some machines just like what they know.
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