5W-20 vs 5W-30 vs 10W-30: What’s the Difference?

5W-20 vs 5W-30 vs 10W-30

The primary difference when looking at 5W-20 vs 5W-30 is their viscosity once your engine has reached operating temperature.



How to Test Engine Compression

Test engine compression

Testing engine compression provides a snapshot of the health of your engine. In this video, we show you how to do it and how to interpret the results.



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.



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.



How To Pick a Car Battery

How to pick a car battery

Understand basic features, like cranking amps, cold-cranking amps, reserve capacity and more before choosing a car battery.



Help Prevent Horsepower Loss Due to Wear & Deposits

Sports car

Engine deposits and wear lead to horsepower loss and reduced efficiency. Here’s a simple solution to help keep your engine running strong.



How to Check Fluids in a Car

How to check fluids in a car.

We provide directions for how to check fluids in a car so you can ensure your vehicle is well maintained and running properly.



Manual Transmission Fluid & Automatic Transmission Fluid: What’s the Difference?

Manual vs automatic transmission fluid

Even with manual transmissions on the endangered species list, questions about automatic vs. manual transmission fluid still arise.



How Often Should I Change Front or Rear Differential Fluid?

How often to change differential fluid increases if you tow.

How often to change differential fluid depends on your vehicle, driving conditions and differential fluid quality. Learn more here.



Hot AMSOIL Products for Your Hot Rod

Mark Moriarity Collection - Classic Car

AMSOIL makes a full line of products for your hot rod or classic car to help keep it running and looking great. Here’s a rundown.