What Motor Oil is Best for Winter? (And Other Cold-Weather Questions)

Car driving in snow during winter

Synthetics are a better choice when looking for a winter motor oil. They remain fluid in cold weather to ease cold starts and improve wear protection.



8 Overlooked Vehicle-Maintenance Services

Vehicle maintenance

These often-overlooked vehicle-maintenance practices can not only help avoid expensive repairs, they can boost performance.



What Your Motor Oil Color Means

Black motor oil usually means the oil is doing its job. Oil that looks like chocolate milk, however, points to serious problems.



The DIY Oil Change: Avoid These 5 Common Mistakes

Many motorists still love the DIY oil change. If you change your own oil, avoid these five common mistakes to ensure your vehicle performs well.



How to Prevent Diesel Fuel From Gelling

Prevent diesel fuel gelling

Diesel fuel gelling and frozen diesel can clog the fuel filter and leave you stranded. Learn why this happens and what to do to prevent it.



How to Boost Fuel Mileage

fuel mileage

Follow these seven tips on your next trip to help boost your fuel mileage and save a little extra at the pump. But be sure to avoid this dangerous practice.



Do Fuel Additives Work?

AMSOIL P.i. fuel additive

Motorists expect fuel additives to immediately boost performance or fuel economy. But most require use for several tanks of fuel to work. Not AMSOIL P.i.



What is a Limited-Slip Differential (and What Type of Gear Lube Should I Use)?

Your differential allows you to corner safely while putting maximum traction to the ground. Here’s how it works, and what kind of gear lube to use.



Why Does My Engine Knock? 3 Possible Explanations.

Do you hear an engine knocking sound when you hit the gas? It could be due to pre-ignition or detonation. Here’s what you can do about it.



Do Older Engines Need Oil With ZDDP Additives?

Using a high-zinc oil with a high dose of ZDDP additives helps protect classic car and hot rod engines. AMSOIL Z-ROD Synthetic Oil contains 1400 ppm zinc.