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.

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…

Year to VIN Chart(From 1980–2069)

Year to VIN Chart

Every vehicle built since 1981 carries a unique Vehicle Identification Number (VIN), a 17-character code that tells you important information about the vehicle, such as the manufacturer, assembly plant, engine type, and most importantly, the model year. The Year to…

AC System Pressure Chart(For All Refrigerant Types)

AC System Pressure Chart

The AC system pressure chart provides both the low-side (suction) and high-side (discharge) pressures for different types of refrigerants under various ambient temperatures. This ensures the system runs efficiently and prevents compressor damage or poor cooling performance. Below, we provide…

Oxygen Sensor Voltage Chart(Complete Guide)

Oxygen Sensor Voltage Chart

Oxygen (O2) sensors are vital components of modern vehicles, responsible for monitoring the air-fuel ratio in the exhaust gases. By detecting oxygen levels and sending voltage signals to the Engine Control Unit (ECU), these sensors help the engine adjust fuel…

Grease Compatibility Chart(For All Types)

Grease Compatibility Chart

Grease is one of the most important lubricants in machinery maintenance. It provides a protective layer that reduces friction, prevents wear, and protects equipment from contaminants like dust, water, and chemicals. However, not all greases are created equal, and mixing…

Jeep Compass Engine Oil Type(Top 5 Best Picks 2026)

Jeep Compass Engine Oil Type

The Jeep Compass is a dependable SUV that performs best with high-quality engine oil designed to meet its specific needs. Using the right oil ensures smoother operation, better fuel economy, and long-term protection against engine wear. If you’re looking for…

Smart Car Engine Oil Type(Top 5 Best Picks 2026)

Smart Car Engine Oil Type

When it comes to maintaining a Smart car’s engine, choosing the right oil is critical. Many drivers lean toward full synthetic oils with European specifications because the small, high-revving engines in Smart models often demand better protection under heat and…