Why Does Motor Oil Turn Black?

How to change your oil

What causes black motor oil? And when your oil darkens does it mean it’s time to change it? Well, there are a couple of factors that can cause the former. Let’s dig in. Factors causing black motor oil Heat cycles naturally darken motor oil During your drive to work in the morning, your engine reaches

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Should I Switch to a Lighter Viscosity Oil in Winter?

thermometer in winter

Motorists sometimes ask if they should use a lighter viscosity of motor oil once winter arrives. Yes – provided your vehicle manufacturer allows it. 



Why do European Cars Require Special Oil?

BMW

For all the grin-inducing benefits of owning a European car – finely tuned performance, sophisticated styling, prestige – they can be a pain. According to this list, four of the top five most expensive vehicles to maintain hail from across the pond.



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.