How Does Synthetic Motor Oil Increase Fuel Economy?

Positive about Gas Prices

Increasing fuel economy remains a top priority for most automakers. Corporate average fuel economy (CAFE) requirements may be in flux, but gas prices continue to inch upward.



A Beginner’s Guide to Motor Oil: What You Need to Know

working on willys jeep

If you awoke this morning asking yourself, “Gee, I wonder what there is to know about motor oil,” you’re in luck. Here, we present a primer on motor oil fundamentals.



8 Hot AMSOIL Products for Your Hot Rod

Back to the 50s 2016 Classic Car

If you’re anything like us, the highly anticipated sights and sounds of hot rods, muscle cars and restomods returning to the open road makes you a bit giddy. It’s a sure sign of road trips, car shows and all things summer.



Making Sense of New Oil Specifications: GM dexos and API SN Plus

check your oil for vehicle longevity

As engine-operating conditions grow more severe, so do the demands placed on your motor oil.



How Do I Switch from Conventional to Synthetic Oil?

conventional and 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?

conventional and synthetic oil

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

Amsoil quality control oil testing

The simple answer No. In fact, there are wide performance differences between base oil group 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?

Amsoil signature series oil weight scale

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?

amsoil oe synthetic 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

new amsoil oe xl series

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.