🛵 Ride Bold, Ride Protected — The Synthetic Edge Your Engine Deserves!
Red Line42504 is a premium 20W50 full-synthetic motorcycle oil designed specifically for modern Big-Twin engines like Milwaukee-Eight, Evolution, and Twin Cam. Featuring ester base stocks and 2200 ppm ZDDP, it delivers superior antiwear protection and optimal friction characteristics for wet-clutch compatibility. Trusted since 1979, this quart-sized oil ensures high-temperature stability and universal fit for sport motorcycles and ATVs, making it the go-to choice for riders who demand peak engine performance and longevity.
| Viscosity | 20W-50 |
| Brand | Red Line |
| Vehicle Service Type | ATV, Sport Motorcycle |
| UPC | 083522425049 |
| Automotive Fit Type | Universal Fit |
| Global Trade Identification Number | 00083522425049 |
| Manufacturer | Red Line |
| Size | Quart |
| Model | 42504 |
| Item Weight | 1.26 pounds |
| Product Dimensions | 4.5 x 3.5 x 9 inches |
| Item model number | RED42504 |
| Is Discontinued By Manufacturer | No |
| Exterior | Painted |
| Manufacturer Part Number | 42504 |
| OEM Part Number | 42504 |
I**
Good
Good product
M**N
Best oil for big V twins.
I started changing my own oil a few years back and tried Red Line for no other reason than the reviews. I have 2 bikes with 103s and an older 88. This oil is amazing compared to the garbage HD uses. You will literally hear and feel your motor run better and quieter. No more clunking or lagging with the throttle. It seems to run so much cooler and smoother. You will not be unhappy with this oil. As a side note, I also use Red Line Primare oil and gear oil and notice a huge difference with them as well. Red Line for all 3 holes.
C**S
Fast delivery.
Fast delivery. This is great oil. It stays relatively clean even when running hard in high dust conditions. Knowing that this oil does well in high temp enviroments, give me some peace of mind when stuck in traffic on a hot summer day. I run it is a '23 Lowrider ST.
R**L
Highly recommend
Works great in my Harley
N**E
Great motorcycle Oil
Great motorcycle oil. It shifts and runs much better - quieter & smoother.
J**N
Quality oil
Good stuff
R**N
Good fluid but no sight to see level inside bottle
Absolutely love this fluid. I give it 4 stars because there is no sight level on the bottle. It’s conpletely black. So when doing my oil change which requires an initial fill of 2.5 quarts I have to guess how much is a half quart on the third bottle. Add a clear stripe like literally every manufacturer does to their bottles so we can see the level remaining in the bottle please!!
E**N
Great oil
The best for a Harley!
Trustpilot
3 weeks ago
1 month ago
