Synthetic engine oil can easily last twice as long as old ... say can last 100,000 miles in normal use. But what about coolant, also called antifreeze in concentrated form? How long can it last ...

Read more: 21 Popular Oil Filter Brands ... Expired or incorrectly mixed coolant may overheat your engine and leave you stranded, and over time can corrode the radiator, water pump, and other ...

and can cause all kinds of havoc in an engine. Oil in your coolant (or vice versa) is probably the most common and well-known kind of bad news fluid mixing, but what about others? What about ...

This can be attributed to worn gaskets, cracks in the engine block, or a blown head gasket, among a handful of other broken down parts. If coolant has made it way into the oil, other symptoms are ...