International Engine Oil Dipsticks

The 700R4 is a great choice when it's time to upgrade your classic car or truck with an overdrive transmission. Here's what you need to know about GM's famous 4-speed automatic.

Is it OK to put Diesel oil in my gas engine? When is diesel oil bad for my car? Do I need to any additives in addition to diesel oil in my gas engine?

Build a high-performance Gen V LT engine with proven power combos and learn about LT upgrades and tuning tips for maximum power

Learn what gear oils do for your differential and how to choose the best gear lubricant for your application's needs

Looking to swap the venerable LS engine into your hot rod, muscle car, or classic truck? Take a look at our detailed identification guide for Gen III/IV LS engines before you hit the salvage yard or swap meet!

Whether you're trying to troubleshoot engine issues or want to get an idea what's going on inside that junkyard jewel that you just hauled home, a leak down test is a great way to ascertain the condition of an engine's cylinders without pulling it apart.

General information on engine oil, including selection recommendations.

OEMs have moved away from flat tappet cams, and so has mainstream motor oil. Find out what you need to know about the best oil for flat tappet cams right here.

Lake Speed Jr., from Driven Racing Oil, discusses how to choose the motor oil with the right amount of zinc for your vehicle's unique needs.

In this guide, Kevin demonstrates how to properly install an external oil cooler in his '54 Chevy Belair with a Big Block Chevy engine.