
Heat can create harmful engine deposits and sludge if your oil isn't up to the challenge. Here's why you need...

Watch how AMSOIL performs in this 2019 Harley with a Milwaukee-Eight 107 engine after 1,000 miles of extreme-heat testing on...

Break-in oil seals the piston rings to the cylinder wall for maximum power and minimum oil consumption. Here's how it...

One horsepower equals 33,000 ft·lbf/min (about 745 watts). We explain what it all means – and its connection to the...

Industry testing shows that AMSOIL delivers excellent protection for turbo cars, limiting deposits on the turbo bearing and shaft. See...

Biodiesel offers a few benefits, like increased lubricity and cetane, but it also presents challenges. Here's what you can do.

Warm up your motorcycle for about a minute to ensure the piston expands gradually and the oil has circulated throughout...

Want the best synthetic oil for your engine? Many companies say they have the best, but we offer proof.

An automatic transmission can shift hard, jerk or hesitate for a number of reasons. Here's what to look for to...

AMSOIL manufactures the best diesel oils on the market, providing the ultimate protection for your hard-working diesel engine, preserving the...