CARS.COM — The variety of oils on the shelf at ... synthetic oil with time as an imperative and money as no object, the answer is a lot clearer than the black stuff: If your car’s owner ...

Semi-regular oil changes are (or should be) a regular part of car ownership ... Is it safe to use oil that's been sitting on the shelf for a year? Do dates matter for engine oil in the first ...

A: I have had several engineers from oil manufacturers on my radio program and all say that, once a bottle of oil has been opened, the shelf life ... If it were my car I would buy a new bottle ...