Oil and fluid testing answers both short- and long-term questions about the internal condition of engines, transmissions and hydraulic systems. A one-time sample of engine or transmission oil gives a ...

Making sure your engine has proper compression is vital for its health. You can rely on one of two methods to test this, but ...

NACFE’s new Messy Middle Powertrain Service & Maintenance report says keeping modern diesel engines running now depends as ...

PC-12 engine oil will change oil selection, drain intervals, and shop procedures as new heavy-duty categories arrive in 2027.

It doesn't matter if you have a hybrid or conventional gas-powered car, a good motor oil can make the difference between a long-lasting engine and a sputtery ride. Here's what you should look for when ...

If you own a Cummins-powered vehicle, there's only one name you'll consistently hear when it comes to engine oil: Valvoline Premium Blue. The product is the only engine oil exclusively endorsed and co ...