How Engine Sludge Forms. And How To Prevent It.

Engine sludge is a black gelatinous substance that wreaks havoc in engines. Combatting engine sludge begins with using a high-quality motor oil.



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.



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

How to check oil properly

Generally speaking, synthetic blends and semi-synthetic refer to the same thing: an oil that uses a combination of conventional and synthetic base oils in its formulation.



Why Does Motor Oil Turn Black?

Oil change

Find out why motor oil turns black and how that may affect your engine and, more importantly, if it signals the time for an oil change.



Why Top Landscapers (Like Duluth Lawn Care) Trust AMSOIL

SABER Professional

Landscape professionals provide the most demanding proving grounds for two-stoke equipment. Their string trimmers, backpack blowers, chainsaws and other equipment run continuously in hot, dirty and wet conditions. And their brutal schedules leave no time for breakdowns. As the video shows, AMSOIL synthetic lubricants have earned the trust of landscape professionals like Duluth Lawn Care.

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What Should I Do with Used Motor Oil?

Container for used motor oil recycling

While most motorists pay someone to change their oil, 25 percent of us still crawl under our vehicles and do it ourselves. When we’re done, what do we do with the used motor oil? It should go without saying, but dispose of it properly. I remember my father draining blackened motor oil from our Oldsmobile

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Synthetic vs. Conventional Oil: The Definitive Guide

AMSOIL, conventional vs. synthetic oil, cold pour

In the battle of synthetic vs. conventional oil, most motorists today know that synthetic oil emerges victorious. It’s widely understood that synthetic oil provides improved wear protection, engine cleanliness and fuel efficiency, among other benefits. Synthetic oil also lasts longer, offering increased convenience and cost savings. But what makes synthetic oil better than conventional oil?

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

Synthetic oil is best for winter. We’re done here. If only it were that simple. But most people want empirical data to support such claims. Well, take a look at the video. We cooled a conventional 5W-30 motor oil and AMSOIL Signature Series 5W-30 Synthetic Motor Oil to -40º. As you can see, the conventional

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Should I Switch to a Lighter Viscosity Oil in Winter?

frozen diesel - 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.