Ryan Gary

Ryan Gary

With a solid foundation of 20 years in the mechanical industry and a Mechanical Engineering degree, Ryan Gary brings a deep understanding of automotive systems to Engine Oil Journal. Driven by a passion for vehicles and a commitment to providing accurate information, he created this platform to empower drivers to make informed decisions about engine oil care.

Coolant Mix Ratio Chart(For All Coolant Types)

Coolant Mix Ratio Chart

A proper antifreeze-to-water mixture ensures that your engine stays within optimal temperature ranges, preventing overheating in summer and freezing in winter. Using the wrong ratio can lead to corrosion, overheating, or even catastrophic engine damage. This post provides a comprehensive…

134a A/C Pressure Chart(Complete Guide)

134a A/C Pressure Chart

If your car’s air conditioning isn’t cooling as it should, one of the first things to check is the refrigerant pressure. Most modern vehicles use R-134a refrigerant, which has a specific pressure range depending on temperature. Understanding and using a…

ZDDP oil chart(For All Oil Brands/Types)

ZDDP oil chart

When it comes to protecting your engine’s internal components, Zinc Dialkyldithiophosphate (ZDDP) plays a crucial role. ZDDP serves as a wear-preventive additive that shields metal surfaces, especially under high-pressure conditions. In this post, we’ll provide a detailed ZDDP oil chart…

Car AC PSI Chart(Complete Guide)

Car AC PSI Chart

Knowing the proper PSI (pounds per square inch) readings can help diagnose performance issues such as insufficient cooling, compressor failure, or refrigerant leaks. This guide explains everything you need to know about car AC PSI charts, including a detailed table…