Ryan Gary

Ryan Gary

Ryan Gary is an automotive enthusiast with over 15 years of hands-on experience in the mechanical industry. His passion for engines, vehicle maintenance, and lubrication inspired him to create Engine Oil Journal, a trusted resource dedicated to helping drivers, DIY mechanics, and automotive enthusiasts make informed decisions about engine oils, transmission fluids, and vehicle maintenance. Through well-researched, practical content, Ryan aims to simplify complex automotive topics and help readers keep their vehicles running at their best.

AC Vent Temperature Chart(Complete Guide)

AC Vent Temperature Chart

Monitoring the AC vent temperature helps determine if the system is functioning efficiently or if there’s a problem with refrigerant charge, compressor, or airflow. This guide provides a comprehensive AC vent temperature chart and explanations of what different readings mean…

ATF Viscosity Chart(For ALL Types)

ATF Viscosity Chart

One of the most critical characteristics of ATF is its viscosity, which refers to how thick or thin the fluid is under various temperature conditions. Understanding the ATF viscosity chart can help you choose the right fluid for your car…

A/C Pressure Diagnostic Chart(For All Causes + Solutions)

A/C Pressure Diagnostic Chart

When your car’s air conditioning (A/C) system isn’t cooling as expected, the first step in diagnosing the issue involves checking both low-side and high-side pressures using a manifold gauge set. These readings provide insights into refrigerant charge levels, compressor health,…

Car AC Gauge Reading Chart(Complete Guide)

Car AC Gauge Reading Chart

One of the most effective ways to diagnose AC performance is by using an AC manifold gauge set to measure system pressure. These readings help determine whether your system is properly charged, overcharged, or suffering from leaks or component failures.…

60/40 Coolant Mix Chart(Complete Guide)

60/40 Coolant Mix Chart

When it comes to keeping your engine running smoothly and efficiently, the coolant mixture plays a vital role. A 60/40 coolant mix, which means 60% antifreeze and 40% distilled water, is one of the most reliable ratios for drivers who…

Transmission Fluid Temperature Chart(Comprehensive Guide)

Transmission Fluid Temperature Chart

This guide provides a detailed Transmission Fluid Temperature Chart, explaining normal, optimal, and dangerous temperature ranges for various vehicles and conditions. Whether you drive a car, truck, or heavy-duty vehicle, understanding fluid temperature helps you extend transmission life and avoid…