Snake oil. Mouse milk. Whiffle dust. Take your pick — few products have earned such unflattering sobriquets as aftermarket motor-oil additives. And for the very good reason that these promised ...

Although most engine oil and gasoline varieties work fine on their own, sometimes they could use a little help with an additive.

Tiny, perfectly smooth carbon spheres added to motor oil have been shown to reduce friction and wear typically seen in engines by as much as 25 percent, suggesting a similar enhancement in fuel ...

Engine oil additives make all sorts of promises about helping your vehicle's motor last longer and increasing your gas mileage. Here's what you need to know.

Additives represent 15 to 20 percent of a gallon of oil with the balance being high-quality base oil. Additive packages play a key role in helping to keep an engine clean and protected from ...

Zinc additives are fairly common in oil, especially when treating a classic or high milage engine, but what does the additive actually do for your engine?

The Claim: RS-R's new engine oil additive can increase horsepower and torque. When our friends at RS-R first came to us with their Ran-Up oil additive, we immediately knew it had a place in "Fact ...

Kristin A. Fletcher, Lisa Dingwell, Kongsheng Yang, William Y. Lam, Jeremy P. Styer, Engine Oil Additive Impacts on Low Speed Pre-Ignition, SAE International Journal of Fuels and Lubricants, Vol. 9, ...

Buying high end oil for your vehicle might cost more in the short term, but it will significantly extend the life of your engine.