motor oil black – Mid Ohio Mobile Mechanic https://midohiomobilemechanic.com Onsite Auto Repair, "We Come To You" Sun, 20 Aug 2023 20:23:07 +0000 en-US hourly 1 https://midohiomobilemechanic.com/wp-content/uploads/cropped-Mid-Ohio-Mobile-Mechanic-Logo-32x32.webp motor oil black – Mid Ohio Mobile Mechanic https://midohiomobilemechanic.com 32 32 Why motor oil turns black https://midohiomobilemechanic.com/why-motor-oil-turns-black/ Sun, 20 Aug 2023 20:23:07 +0000 https://ricksfreeautorepairadvice.com/?p=353108 Here’s why motor oil turns black Soot from incomplete combustion turns motor oil black All internal combustion engines create soot as the fuel is burned. Some of that soot makes its way into the crankcase due to blow-by. Soot creation is highest during cold starts due to partial combustion caused by the cold metal “quenching” effect. But even after the engine is warmed up, combustion isn’t always 100% efficient because the air/fuel mixture is never 100% accurate. The computer tries to calculate the exact air/fuel mixture and it could easily … Read More

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