Motor oil has quietly become one of the most important choices car owners make, especially as vehicles routinely cross ...

How do you know if your engine is healthy? How To Read An Oil Analysis! What happens to an engine oil over a road trip? We’ll ...

The inside of this 5.0L Coyote looks surprisingly healthy, which makes its relatively early replacement even more interesting ...

Studies show that the Prius has one of the lowest lifetime cost-per-mile figures of any vehicle sold in the U.S., but that ...

Here are 2025's most popular questions and answers from The Journal's Car Doctor column, from rotating tires to oil changes.

Ask several different people, and you’ll get different answers about how often oil should be changed. Some suggest every 3,000 to 5,000 miles. Others say that one can drive between 7,500 and 10,000 ...

China’s leading marine lubricant suppliers are embracing onboard oil testing technology. The adoption of portable lube-oil analyzers represents a shift in how the country’s oil majors including ...

RS-25 prime contractor L3Harris continues to ramp up production of new flight engine hardware at their Los Angeles area facility and final assembly at the Stennis Space Center. NASA certified ...

Petro-Canada Lubricants, an HF Sinclair brand, announced that its Duron Advanced 5W-30 FA-4 heavy-duty engine oil has been approved for Volvo VDS-5 and Mack EOS-5. The approval follows extended field ...

Oil consumption issues have become a growing concern among modern car owners, especially as tighter emission standards, turbocharging, and lightweight engine designs often lead to thinner piston rings ...

GE Aerospace and Kratos have concluded high-altitude testing of a small jet engine intended to power uncrewed fighter aircraft. The pair, which announced their intent to jointly develop the GEK800 ...