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Any Problem if Diesel Engine Oil Is Added to an Engine Filled with Non-Diesel Oil?
 
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Question:
Any Problem if Diesel Engine Oil Is Added to an Engine Filled with Non-Diesel Oil?
I have Mobil 1 Truck & SUV in my 1991 Mercedes Diesel. Will anything be hurt by adding a quart of Mobil 1 diesel engine oil??? On the road, it was all I had... down a quart... Thanks
-- Robert Kravontka, Waterbury, CT
Answer:
No, there is no issue with mixing Mobil 1 products.  Your engine should be fine.  In fact we would recommend you use the Mobil 1 Turbo Diesel Truck formulation in your truck in the future.
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