Do I Need to Change Oil Every 3,000 Miles?

Changing oil at a quick lube.

The practice of changing oil every 3,000 miles began with a noble purpose, but advances in motor-oil technology have made it obsolete.



What Happens if I Use the Wrong Weight (Viscosity) of Oil?

It’s best to use the viscosity recommended in your owner’s manual, but a slightly thicker oil or thinner oil likely won’t do lasting harm.



What is Antifreeze? We Explain Here.

Engine antifreeze and coolant reservoir

Motorists know the importance of keeping their vehicles’ antifreeze reservoirs full, but what is antifreeze and when should you change it?



How to Repack Trailer Bearings

Repack trailer bearings

Repack your trailer bearings yearly to ensure your next vacation or trip to the lake goes smoothly. Here’s how to do it.



AMSOIL Helps Awaken 500+ HP Cummins 4BT Engine

Kenny Hauk dynos a Cummins 4BT

We help Kenny Hauk’s crew turn a stock 105-hp Cummins 4BT engine into a 500-hp powerplant for his latest build.



Is Starting Fluid Bad for Gas Engines?

In small doses and used properly, starting fluid can be effective in hard-starting gasoline engines. But it can be bad for two-stroke or diesel engines.



How to Bleed Brakes

How to bleed brakes

It’s a good idea to change brake fluid every two years or whenever you change brake pads. In this video, we show you how to bleed brakes.



What is Engine Detonation?

Car engine diagram

Engine detonation refers to spontaneous combustion of the remaining fuel/air mixture in the chamber after normal spark-initiated combustion.



Do Transmission Fluid Additives Work?

Do transmission additives work?

Transmission additives supposedly fix erratic shifting, leaks and other problems. However, testing has shown they can make transmission performance worse.