Skip to main content

Protect you motorcycle from blistering heat

The AMSOIL motorcycle oil line is over-engineered to provide protection in the most severe circumstances. Any quality oil will enhance performance to a degree where the rider will notice right away. Things which alert our customers attention is easier start-up, smoother and freed’-up idle. Noticeably smooth acceleration especially under loads and higher RPM. And of course the lack of clutch fade when the oil starts to get to the end of its service life. With AMSOIL you will not experience clutch fade.

We now carry a number of products from 20W-50, 10W-40, 20W-40, 10W-30, SAE60, Special supercross spec dirt bike oils in the 40, 50 and 60WT lines. And our ATV lineup which also has specific products for Polaris.

Products for all makes are specified on the bottles. The more popular ones are also available in gallons.

If you work on bikes or own a service center stocking AMSOIL is a must. If you believe in the quality of your own service nothing will support or compliment your work as AMSOIL will. It’s the product used by the pros. Even Eric Buell requires any shop selling his bikes to have AMSOIL on hand as other oils actually resulted in poor performance per his own words.

Amsoil protects air cooled engines under intense heat

Harley motor under intense heat test – no cooling!

 Torture test:

Are you ready for the summer heat?

AMSOIL’s Central Page on Motorcycle Oils – datasheets and more data

All products are in stock on the Sioux Falls store.

 

Your bike should never get this hot. If it does, AMSOIL has you covered.

Your bike should never get this hot. If it does, AMSOIL has you covered.

How can a 20W-50 be used in my transmission requiring a 75W-90?

We get this question a lot and it’s a good one!  – How can a 20W-50 be used in my transmission requiring a 75W-90 (80W-90, 75W-110)

The answer is simple if you have a chart to reference by. The viscosity for engine oils and gear oils are not part of the same scale. In fact a SAE 90 gear oil may actually have less viscosity than a SAE50 (20W50). The illustration clearly explains why. Now you know something most mechanics don’t know.

See why motor oils sometimes work as transmission or gearcase lubes.

See why motor oils sometimes work as transmission or gear case lubes.

Note that when these charts were published when the 75W-110 category was not yet popular. A 110 make up that 1/3 section at the top of a 90WT and the lower part of the 140WT.

The AMSOIL 20W-50 will remain a 50WT engine oil through it’s recommended interval. Many other motorcycle oils have been tested to not follow this same path. They either fail after 1/2 their life or start at the low end of the category so are less likely to hold the needed viscosity. The higher the viscosity the more it costs the manufacturer so less $ to stock holders and AMSOIL has no stockholders to cheapen the formula!!

The new AMSOIL V-Twin Transmission fluid is right in the heart of the 75W-110 zone so use that product to really smooth out  your transmission if you have gear clatter.

Also note that if you take a bottle of each 75W-90 and 20W-50 you will notice they don’t flow the same – that’s because of their “W” or winter category. They will however when the temperature reaches the 100F as noted on the chart.

Here’s an updated clipping of the SAE Gear Oil segment to make better sense of the above.

75W-110 takes the old junction of the 90/140 split.

75W-110 takes the old junction of the 90/140 split.