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Signature Series Battles Sludge

Signature Series Battles Sludge The health of your engine depends on motor oil circulating quickly and efficiently through the system, but sticking components and obstructed passages inhibit motor oil from lubricating, cooling and protecting your engine. Engine “sludge” occurs when oxidized oil and contaminants build up on engine surfaces. It can restrict the flow of […]

Why Did We Reformulate Signature Series ...

Better oil more power

Why Did We Reformulate Signature Series Synthetic Motor Oil? Local Sioux Falls note: We are reposing this article from last fall as it is important to realize the changes coming and how these enhancements will only add to the performance on older vehicles too. AMSOIL’s Signature Series likely already exceeds the future API specification which […]

The Pinnacle of Performance

New Industry Leading 100% SYnthetic Oil to surpass engine tests no other oil can come close

The Pinnacle of Performance The new Signature Series Synthetic Motor Oil formulation builds upon its rock-solid foundation to offer enthusiasts a new level of engine protection. Signature Series Synthetic Motor Oil (ASM, ALM, AZO, ASL, ATM, AZF, AMR) Improving Signature Series was a challenge, but the results prove the new formulation blows the doors off […]