High mileage engine oil can help stave off serious damage and wear if used properly. If your engine has high mileage — at least 75,000 miles or more — but is otherwise in solid condition, then ...

Used right, in the right engine, they can help. Used wrong, they're a waste of money or worse. If your engine is healthy and your oil is fresh, save the $15 for something useful. Like gas. Or tacos.

If an engine isn’t burning or leaking oil, or if it uses, say, less than a quart over 6,000 miles or so, switching to high-mileage oil may not be worth the extra cost for you.

Fuel stabilizer is a liquid that has a very necessary function for your vehicle, but only in a specific scenario. Here's what it is, and when you'll need it.

Prolong’s Super Heavy Duty Oil Stabilizer will not void engine warranties and helps prevent sludge and varnish deposits when used with petroleum and synthetic oils. The product is available in ...

When it's freshly made, conventional 5W-30 motor oil acts like its synthetic counterpart, but over time, the chemical additives break down or vaporize, returning the oil to its original consistency.

Some oil additives, for instance, might advise putting in the additive roughly 100 to 300 miles before doing an oil change (and that might be in fine print, so read carefully), which means the ...

Irvine, CA-based Prolong International Corp. has unveiled a new heavy duty oil stabilizer, formulated to help stop oil leaks and excessive oil consumption, reduce exhaust smoke, stabilize ...

Ethanol-containing gasoline can deteriorate in just 30 days. Most of the fuel stabilizer products do a great job of protecting small engines. These additives are primarily antioxidants.