Motor oil is a key to your car, lubricating parts that mustn't grind together. And there are lots of potential signals to tell you if it has gone bad.

Oil analysis isn't meant for finding nuts and bolts in the oil pan-that's what magnets are for. Rather, ... and can enter the engine through loose connections or bad filters.

If you’ve been given a lovely bottle of posh olive oil for Christmas ― or just bought one for yourself ― you might be tempted to save it for a special occasion. But experts say your ...

Fresh olive oil has a pleasant, herbaceous scent. If the smell changes and you catch a waxy, crayon-like odour, that's a clear sign it's gone bad. Some might even have a musty, damp wood scent. Before ...