Jeep XJ Oil, Fluid, and Additive

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

How does ZDDP or zinc help my engine live longer, what does ZDDP do and why is it important to use ZDDP oil in my engine?

Do I need break-in oil for my engine and why. When should I not use an engine break-in oil? What do I look for when choosing a break-in oil?

Classic cars ran on normal motor oils for decades, so why change now? The answer lies in the evolution of gasoline engines and how motor oil has co-evolved.

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

In this Tech Tip, John answers a customer concerns about adding additional drop to his 1960-1972 Chevy truck.

General information on engine oil, including selection recommendations.

Lake Speed Jr., from Driven Racing Oil, answers the question "what viscosity grade should I run". He explains what viscosity really means and some key factors to keep in mind when selecting the right viscosity grade for your engine and application.

The process on how to effectively winterize your fuel system in open wheel racing. This includes step by step instructions and recommended parts to use for your fuel system.

In this Tech Tip, John offers up a couple solutions to a somewhat common problem of fuel expansion on the older vehicles.