Watch how AMSOIL performs in this 2019 Harley with a Milwaukee-Eight 107 engine after 1,000 miles of extreme-heat testing on the dyno.
The Unser family has produced several notable racers over the years, including Bobby, Al Sr. and Al Jr. Loni Unser is aiming to add her name to that list.
Buying a used boat? Here’s what to look for to ensure you don’t waste your hard-earned money buying someone else’s problems.
Many motorists are switching to synthetic motor oil for the first time. Find out everything you need to know about synthetic vs. conventional motor oil.
Lawnmower won’t start? It’s probably due to bad gas or a dirty carburetor. Here’s what to look for and what to do when your lawnmower won’t start.
Using a high-zinc oil with a high dose of ZDDP additives helps protect classic car and hot rod engines. AMSOIL Z-ROD Synthetic Oil contains 1400 ppm zinc.
Summer-blend gas provides about 1.7 percent increased energy content, meaning it offers a slight boost in fuel economy. Here’s how else it’s different.
Break-in oil seals the piston rings to the cylinder wall for maximum power and minimum oil consumption. Here’s how it works and when to use it.
Adding a diesel coolant additive, or supplemental coolant additive (SCA), midway through the service interval is easy to overlook and fraught with problems. Here’s a better way.
One horsepower equals 33,000 ft·lbf/min (about 745 watts). We explain what it all means – and its connection to the London beer-making industry – here.