Skip to main content

The Best Priced 100% Synthetic Value

AMSOIL 5W-30 100% Synthetic High-Mileage Motor Oil

Save More in the Sioux Falls store when you Join!

If you buy in the Sioux Falls AMSOIL store become a PC and save!

Look up your Oil, Filters and Save 25%

Free Catalog

See the Latest Products and Preferred Customer Pricing.

Vehicle Look-Up Guides

Match AMSOIL to your Equipment. Get Filter Numbers

Wholesale Buying Deal

Local or Out of State - Get AMSOIL at Cost (PC Pricing)

Customer Reviews

Where Oil Goes and What it Does

bearing surface wear

The Responsibilities of Your Motor Oil A typical engine contains hundreds of parts, none of which could function properly without oil. Far from a simple commodity, oil is a dynamic enabler of performance. It must lubricate, cool, protect, seal, actuate components and more. And it must do it all while exposed to tremendous heat and […]

Which Small-Engine Oil Would You Choose?

small engine cleanliness

Which Small-Engine Oil Would You Choose? Spring marks the time to store your snowblower and prepare your lawnmower, pressure washer, generator and other equipment for another season. Make sure to change oil before storing equipment. Used oil contains acidic byproducts that can damage the engine if allowed to sit for months. If you neglected to […]

Is an Engine Flush Good or Bad?

flushed cylinder head

Should you be concerned using Engine Flush? John Baker|Nov 26, 2018 11:00 AM To flush or not to flush. (One of our best sellers here in Sioux Falls) It’s a question whose answer is obvious in the bathroom, but vigorously debated in the garage. Let’s get right to the point. Is an engine flush good or […]

Signature Series Motor Oil Protects Engi...

LSPI

SIGNATURE SERIES Protects Engines from Future Industry Problem LSPI can destroy pistons and connecting rods, bringing an engine to a standstill in seconds. Original equipment manufacturers (OEMs) like General Motors (GM)* have addressed the issue by designing tests to gauge a motor oil’s ability to prevent these destructive events. Signature Series achieved 100 percent protection […]

Treat Your Differential To the Industry Best