How Do I Switch from Conventional to Synthetic Oil?

To borrow a famous slogan, just do it. There is still some confusion about changing to a different type of oil in vehicles, particularly older models that have accumulated many miles. A small group of ill-informed individuals in garages and on blogs still cling to old beliefs that synthetic motor oils cause roller followers to

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Do Motor Oil Additives Work?

What do motor oil additives do? The shelves at your local auto parts store are full of aftermarket motor oil additives and oil treatments that promise a cornucopia of benefits, such as… Increased fuel economy Reduced friction Maximum horsepower Improved engine cleanliness To provide this added performance, aftermarket motor oil additives use different chemical components

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Are all Synthetic Oil Groups the Same? Group III vs IV vs V

The simple answer No. In fact, there are wide performance differences between base oil categories. Generally speaking, Group IV base oils offer the best performance, Group III second best, and so on in reverse order. But be forewarned – there are exceptions. And, you can’t judge motor oil performance solely on base oil type.

What Happens if I Use the Wrong Weight (Viscosity) of Oil?

It depends on how your engine is built and how it reacts to the specific viscosity of oil you use. That’s pretty nebulous, so here are some examples.

What’s New about Reformulated OE Synthetic Motor Oil?

First Signature Series Synthetic Motor Oil, then XL Synthetic Motor Oil. Now, OE Synthetic Motor Oil is our latest oil to undergo a formulation change and facelift.

Reformulated XL Motor Oil: Stronger for Longer

So, what’s new about reformulated XL Synthetic Motor Oil? In essence, XL protects better for longer, yet costs the same as before. It’s the perfect choice for enthusiasts who want to do something extra for their vehicle.

AMSOIL Heads to SEMA New Product Showcase with 13 New Products


The mighty SEMA show is just around the corner, and our AMSOIL trade show team is busy preparing for another successful presentation to the key players in the automotive industry. SEMA is where companies learn of the latest news, products and technology developments that shape the automotive aftermarket.

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.

Why Did We Reformulate Signature Series Synthetic Motor Oil?

Simply put, we reformulated Signature Series Synthetic Motor Oil to solve problems. For all the derision heaped upon the internal-combustion engine, it remains our primary mode of propulsion. And, despite the gains of hybrids and electric vehicles, it will remain so for the foreseeable future.

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.