Hot answers tagged lubrication
It's fine to run Synthetic Oil with crushed Dinosaurs, which is exactly what 'part-synthetic' oils are - but because the chemistry of the two oils you have is unknown, I wouldn't do it for too long (the TBN - Total Base Number - of the mixture may change in unexpected ways). By running the 'wrong' oil, you're better off than running it with no (or low) oil! ...
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