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Red Line 20W50 Motorcycle Oil


  • Designed for the latest Big-Twin motorcycle engines that specify 20W50 motor oil, including Evolution, Twin Cam, and aftermarket engines of similar design
  • Superior film strength through the use of ester base stocks for protection and ring seal
  • Extended drain intervals over other brands due to higher quality basestocks and excellent dispersants
  • Blended with specific friction modifiers that are compatible with wet-clutches, suitable for JASO MA applications

Typical Properties:

API Service Class SJ/SG/SH JASO MA
Viscosity Grade SAE 20W50
Vis @ 100°C, cSt 20.1
Vis @ 40°C, cSt 141
Viscosity Index 165
CCS Viscosity, Poise, @ °C 50@ -15
Pour Point, °C -45
Pour Point, °F -49
Zinc, %wt 0.25
Phosphorous, %wt 0.21
Molybdenum, %wt 0.05
NOACK Evaporation Loss,1hr @ 482°F (250°C), % 5
% Viscosity Loss, 30 Pass ASTM D6278 0
HTHS Vis, cP @150°C, ASTM D4741  6.1

4.9 / 5.0
26 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Red Line 20W 60 Oil Shovelhead HD
I had the oil pump on my 1981 HD shovelhead fail.I rode approximately 100 miles and the engine miraculously held together. I swear by this product for old Harley's. It is expensive, but then, so is an engine rebuild.

PROS: Oil pump was broken, Stays on cylinder surface, Handles extreme heat, Worked without pressure, Handles wide gaps, Kept engine from blowing

CONS: Is expensive, Is hard to clean up

December 19, 2009
Redline makes a great product
I've been using it in my 98 Dyna Wide Glide for a few years now and it runs great and I'm very happy with it, I put 15,000 mile on it last year and it runs like the day I bought it.

PROS: My Harley Loves Its

April 21, 2014
Redline Oils and Lubricants for Harleys
Superior lubrication and cooling for Harley Davidson engines, transmissions, and primaries! Highly recommend their use! Cycle Gear always has them in stock and at a great price! Thank you!
October 16, 2012
Red Line so fine
i've a 2006 KLR 650 & have used about 4 different brands of oil. The preformance with Red Line is eceptional it has quieted & smothed the Big Thumper.
November 7, 2012
Best stuff out there! Only stuff I use
Engine runs smooth
February 14, 2013
Best Oil
I run Redline in my Motorcycles and Boat. I have used Redline for many years and can say it makes a great machine happy.

There is nothing better than good oil to build confidence on a long ride where you have to depend on the machine. Worries evaporate
August 21, 2013
Awesome Oil!!!!
I was using the manufacturers synthetic oil because that is what my maintenance program I bought would mostly cover after initial bike break in. I did some research with the various synthetic bike oils out there so I could make a change since I have been changing my own oil for a couple of years now. I wanted something better basically. A friend and co-worker of mine said he used Red Line Oil in his bike and has driven from Texas to Montana and back without any issues. So I decided to try Red Line Oil and what a difference it makes!!! It goes into gear and into neutral better than ever. Smooth shifting, a bit more pep and a bit better gas mileage since putting Red Line Oil in my bike. Best decision I have made in a long time. Thanks to Cycle Gear and a big Texas thanks to Red Line Oil.

PROS: Better Gas Mileage, Improved Hp, Smoother Gear Engagement

CONS: None that I can think of

August 1, 2014
Top of the line
If you ride an air cooled 500cc single on the street as I do, or just want the best syn motor oil for your ride, Redline oil is the one to get. I bought my bike with 1800 miles on it. It has 8700 now. I change oil with Redline syn every 2500 mi. The motor dosen't smoke or use oil and it seems to run cooler.
August 17, 2014
Top shelf oil
Redline oil is pretty much the highest quality motor oil you can buy. Base stocks appear to be higher quality than other brands.

PROS: Lubricity, Heat resistance, Longer Drain Interval

CONS: Cost

BEST USES: High Performance Engines, High Sustained Temps
May 29, 2015
Redline Motorcycle Oil Purchase
I have ordered redline 20/50 motorcycle oil online from cycle gear before,the process is easy and I get the product within 5 days. Wish the online order per qt. could be a little cheaper than actually purchasing it at my local Cycal Gear though(only reason I give it 4/5 stars).Overall a good transaction,no problems.

PROS: Quickly Received Purchase

CONS: Online Prices Are Same

June 3, 2014
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Product Style Item # Manufacturer Product # Availability
1 Gallon / 20W50 952539 42505 Out of Stock
1 Quart / 20W50 952562 42504 In Stock: Ships within 24 hours