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Will Mobil 1 Reduce Exhaust Smoke in Older Mileage Vehicles

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Question:
Will Mobil 1 Reduce Exhaust Smoke in Older Mileage Vehicles
Can synthetic oil such as Mobil 1 reduce or eliminate exhaust smoke from a high mileage/worn automobile gasoline engine?
-- Gerald Van Ess, West Milford, NJ
Answer:
Yes, exhaust smoke that is visible after the engine has had a chance to warm up can often be due to engine oil that is burned during the combustion process (a tell-tale sign of this is a blue tinge to the visible smoke). Conventional oils are thermally less stable than synthetic oils, and are therefore more prone to burn-off during combustion. Using synthetic oils such as Mobil 1 should reduce the amount of oil that ends up in the exhaust stream, and therefore may help to reduce the amount of visible smoke.
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