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.

4.0 Jeep Engine Oil Capacity(For All Models)

4.0 Jeep Engine Oil Capacity

This guide breaks down everything you should know about the 4.0 Jeep engine oil capacity, oil type, and maintenance schedule. 4.0 Jeep Engine Oil Capacity The 4.0 Jeep engine oil capacity is 6 quarts (5.7 liters) with a new oil…

Ford AOD Transmission Fluid(Top 5 Best Picks 2026)

Ford AOD Transmission Fluid

The Ford AOD transmission is a 4-speed overdrive automatic transmission introduced by Ford in the early 1980s. To maintain a healthy AOD transmission, whether original or rebuilt, always use ATF that explicitly meets MERCON or MERCON-V specifications. Ford AOD Transmission…

6.7 Powerstroke Transmission Fluid Type(Top 5 Best Picks 2026)

6.7 Powerstroke Transmission Fluid Type

Below are the five best transmission fluids commonly chosen by 6.7 Powerstroke owners, all compatible with Ford’s specifications. These options are widely available and known for excellent performance, durability, towing reliability, and heat resistance. 6.7 Powerstroke Transmission Fluid Type 1.…

Diesel Truck Transmission Fluid(Top 5 Best Picks)

Diesel Truck Transmission Fluid

Diesel trucks operate under heavy loads, long hours, and extreme conditions. This makes selecting the right transmission fluid even more critical. Heavy-duty trucks generate more heat and stress, so the fluid must offer excellent lubrication, thermal stability, and protection against…

Kohler Engine Oil Filter Cross Reference(For All Brands)

Kohler Engine Oil Filter Cross Reference

Using a reliable cross-reference guide helps engine owners identify compatible aftermarket filters without compromising engine performance or protection. A cross-reference chart matches Kohler OEM part numbers with equivalent filters from trusted brands like WIX, Fram, Purolator, Baldwin, AMSOIL, and more.…

Dump Truck Hydraulic Fluid(Top 5 Best Picks)

Dump Truck Hydraulic Fluid

The right hydraulic oil ensures smooth lifting, protects the pump and cylinders, reduces heat buildup, and minimizes wear and tear. This guide explains everything you need to know about dump truck hydraulic fluid, what it is, how to choose the…

Cummins Onan Generator Oil(Top 5 Best Picks)

Cummins Onan Generator Oil

This guide covers the recommended oil type for Onan generators, when to change it, and the five best oils available on the market today, complete with features in simple bullet format. Cummins Onan Generator Oil Cummins Onan recommends using high-quality…