Person holding a large, beige bottle with measurement markings, in a store aisle lined with similar bottles.

Engineered for Performance and Protection

AMSOIL is a leader in synthetic lubrication solutions, offering products designed to enhance engine performance, reduce wear, and extend service life. With a reputation for quality and innovation, many AMSOIL diesel and motor oils deliver guaranteed protection for up to 25,000 miles, making them a preferred choice for those seeking reliability and efficiency.

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Stay Informed & Updated

Understanding Oil Viscosity Presentation Slide.

Understanding Oil Viscosity

12/11/2025
Viscosity is the measure of a fluid's resistance to flow. The physical properties of lubricants...

Unmatched Protection for Every Drive

AMSOIL’s advanced formulas provide unmatched protection, whether for daily use or high-performance applications. Reach out today to get access to top-tier AMSOIL products. Whether you need AMSOIL transmission fluid or accessories, we are your right choice.

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More AMSOIL® Products

Black hydraulic hose with printed specifications.

Hose, 13/32″ Diam 1 ft Section

Hose, 13/32" I.D., Sold by the Foot Product Code: BP250-EA BUY...
Black braided hose with specifications printed.

Hose, 1/4″ Diam, 1 ft. Section

Hose, 1/4" I.D., Sold by the Foot Product code : BP251-EA...
Metal fitting with ruler for scale.

Hose Fitting, 13/32″ Diameter

Fitting, 13/32" Hose, 3/4"-16 JIC Product code : BP260-EA BUY NOW
Metal connector fitting with measurement scale.

Hose Fittings, 1/4″ Diameter

Fitting, 1/4" Hose, 7/16"-20 JIC Product code : BP261-EA BUY NOW
Metal fitting with measuring rulers above.

Fitting, 7/8-14, 5/8 JIC

Fitting, Adapter, 7/8"-14 x 5/8" JIC Product code : BP289-EA BUY...
Metal pipe fitting with measurement scale background.

Fitting, 7/8-14 to 7/16-20JIC

Fitting, Adapter, 7/8"-14 to 7/16"-20 JIC Product code : BP313-EA BUY...
Metal fitting next to a black ruler.

ADAPTER 1/8 MNPT 7/16 JIC

Fitting, 1/8" NPT to 7/16"-20 JIC Product code : BP208-EA BUY...
Black rubber ring with measuring ruler.

Gasket,3.91OD,3.57ID,0.35Thk

Gasket for BK301 that is part of BMK23 and BMK26....
Black ring with measuring rulers nearby.

2-1/2″ Gasket

Gasket for BK295, BK296, BK297, BK298, BK299, BK300 and BK310...
Metal bracket with measuring ruler.

Mounting Bracket – Bottom

Bracket, Filter Mount Assembly, Bottom Product code : BP195-EA BUY NOW
Metal bracket next to black measuring ruler.

Mounting Bracket – Top

Bracket, Filter Mount Assembly, Top Product code : BP194-EA BUY NOW
Metal screw plug next to a ruler.

3/4″ -16 Allen Head Plug+O Ring

Plug, Sealing, 3/4"-16 Product code : BP191-EA BUY NOW
Metal fitting with measuring ruler background.

Adapter 3/8″ MNPT to 3/4″-16 JIC

Fitting, 3/8" NPT to 3/4"-16 JIC Product code : BP190-EA BUY...
Small metal valve beside measuring ruler.

Valve, Sampling

Valve, Deluxe Oil Sampling, 1/4 NPT Product code : BP145-EA BUY...
Bolt assembly with ruler for scale measurement.

OIL RETURN FITTINGS

Assembly, Filler-Cap Return Fitting Product code : BP89-EA BUY NOW
Brass valve with ruler measurements.

BY-PASS PETCOCK VALVE

Assembly, Petcock Valve with 1/8" NPT Street Tee Fitting Product...
No image available, placeholder graphic displayed.

“O” RING # 115 BP89

O-ring, 11/16" I.D. x 0.10 Thk. Product code : BP55-EA BUY...
Gold right-angle adapter next to ruler.

Street Elbow

Fitting, Street Elbow, 1/8" NPT Product code : BP52-EA BUY NOW
Brass valve with wingnut and ruler.

Oil Sample Petcock Valve

Valve, Oil Sample Petcock Product code : BP47-EA BUY NOW
Brass adaptors with measurement scale background.

ADAPTER KIT 824520-431360

Fitting, Oil-Sending Unit Adapter Kit, 10mm x 1.0 (European cars)...
Two metal fittings next to a ruler.

ADAPTER KIT #82561

Fitting, Oil-Sending Unit Adapter Kit, 1/8" NPT x 28BSP (Japanese...