Should You Use Diesel Competition Oil?

April is here, and for those who love to spend time at the drag strip challenging their reaction time, on a dirt strip hooked to a sled, or tied down on a roller dyno grunting for power, the diesel competition season is upon us.



How a Differential Works (and the Type of Gear Lube to Use)

Think of all the devices we take for granted that improve our lives. The refrigerator. The microprocessor. The air conditioner. The spork.



What’s the Difference Between DOT 3 and DOT 4 Brake Fluid?

The primary difference between the two is their respective boiling points. I suspect I know your next question. But first, some background. The U.S. Department of Transportation classifies brake fluid into four main categories:



How to Fix Diesel Fuel Gelling with Cold Flow Improvers

I don’t know about where you live, but winter in Minnesota hit pretty hard starting in November, and it seems Old Man Winter is fired up and settled in for a long, cold season. For those who love ice fishing, the cold temps make the ice safer, giving us additional opportunity.



Oil Life Monitors – Everything You Need To Know

For the past couple months, every time I start my truck I hear an annoying “ding” followed by an equaling annoying message saying “Change Engine Oil Soon.” I know what you’re thinking – you’d better change your oil! My oil life monitor agrees.



‘Tis the Season for Frozen Diesel Fuel: Here’s What to Do About It

Are you in the holiday spirit? The season is bustling, and everyone is burning the candle at both ends. There’s no time to waste, especially stuck on the side of the road after the diesel fuel in your car or truck froze overnight. Are you prepared?



Prepare Your Vehicle for Winter

Cold-weather oil performance Snowy Car Windshield

Originally posted Nov. 11, 2016 With the worst of winter right around the corner, now is a good time to get your vehicle prepared for the worst. Being based in northern Wisconsin, we at AMSOIL talk a lot about how synthetic lubricants make life a little easier, as the cold air starts to pierce our

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How Often Should I Change Front or Rear Differential Fluid?

Chevrolet Towing Camper

It depends on your vehicle, driving conditions and differential fluid quality. That’s a pretty vague answer, but it’s true. If you drive your truck primarily on the highway in temperate conditions and rarely tow or haul, you likely don’t need to change front or rear differential fluid very often.



Why Does Motor Oil Turn Black?

Motor oil turns black during use for a couple reasons: 1) Heat cycles During your drive to work in the morning, your engine reaches normal operating temperature (typically 195ºF-220ºF), heating the motor oil. Then the oil cools while your car sits in the parking lot.



The Pros and Cons of Semi-Synthetic Oils and Synthetic Blends

Motor oil

Scott D. Galbreath asks via our Facebook page about the pros and cons of synthetic blend motor oils. Thanks for the question, Scott. Making sense of motor oil can be confusing and frustrating. Choosing among full synthetics, synthetic blends, semi-conventional, conventional, high-mileage full synthetics and synthetic blends is just the beginning.