Engine oil additives make all sorts of promises about helping your vehicle's motor last longer and increasing your gas ...

If your engine oil sees 8,000‑rpm weekends, the purple premium may be comparable to cheap insurance. The Skeptics Designer‑water jokes and eye-rolls aside, the purple jug isn't cheap.

Choosing the right oil can make or break your engine. ... What’s Inside That Bottle of Oil Really Does Make a Difference. Black Gold. HOT ROD Staff Writer Jun 24, 2019. See All 14 Photos.

But since oil changes happen so infrequently — changing it out every 5,000 to 10,000 miles is recommended – you could find yourself with a bottle or two of unused engine oil for an extended ...

When you look at a bottle of motor oil, you are assaulted by all the numbers and letters and whether or not it's synthetic. Without knowing what those figures signify, it can look almost random ...

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.

Marine engine oil is a substance essential to just about any boating mission. ... During my visit, gallon jugs of Mercury oil were on the line. I helped take empty black jugs from a big box and line ...

Weight. This is the oil's viscosity, expressed as a number like 5W-20. The 5 in this example is the cold viscosity and 20 is the hot viscosity at the engine's full running temp.

Motor Oil Age Doesn’t Matter as Much as Mileage: ... The bottle turned out to be almost 14 years old, and Mobil 1 said its age meant it’d broken down and wouldn’t properly protect an engine.

Curious About Returning Motor Oil August 10, 2011 / 5:21 PM EDT / CBS Boston Your article on the bottle return made me wonder about the motor oil return policy.

Designer‑water jokes and eye-rolls aside, the purple jug isn't cheap. Expensive oil is often a waste of money and a 5‑quart jug of Royal Purple can run $5 to $15 more than Mobil 1 and even ...