Red Line 4T 20W-50 Synthetic Blend Motor Oil - Harley Touring, Softail, Dyna
About Red Line
Red Line parts and accessories are stocked at Vtwinbikers for Harley-Davidson and Indian Motorcycle applications. Every Red Line item we list is new and sourced through authorized distribution. If you are not certain a part matches your year and model, use Shop by Bike or email our team before you order and we will confirm fitment first.
Red Line 4T 20W-50 motor oil is a high-performance synthetic blend specifically formulated for V-twin motorcycles, including a wide range of Harley-Davidson and Indian Motorcycle models. Engineered with ester base stocks and JASO MA-compatible friction modifiers, it provides superior film strength and ensures seamless wet-clutch operation.
Why riders pick this
- Superior film strength from ester base stocks
- JASO MA-approved for wet-clutch systems
- Extended drain intervals over conventional oils
- Excellent dispersant package for engine cleanliness
- Reliable ring seal protection for V-twin engines
For riders who demand the best from their V-twin, Red Line 4T 20W-50 delivers. This oil is designed to protect your engine in the most demanding conditions, offering reliable ring seal protection and maintaining engine cleanliness through its excellent dispersant package. Whether you're on a long tour or tearing up the streets, you can trust Red Line to keep your engine performing at its peak.
Advanced Protection for V-Twins
- Ester base stock construction provides superior film strength and wear protection
- JASO MA-approved friction modifiers ensure smooth wet-clutch operation
- Supports extended drain intervals over conventional motor oils
- Excellent dispersant package helps maintain engine cleanliness
- Reliable ring seal protection for sustained engine performance
Optimized for Harley-Davidson and Indian Motorcycle
Red Line 4T 20W-50 is an ideal choice for many Harley-Davidson Touring, Softail, and Dyna models, as well as Indian Motorcycle engines that specify a 20W-50 viscosity. Its advanced synthetic blend reduces wear and heat, contributing to longer engine life and consistent power delivery. For precise fitment and optimal results, always verify the recommended oil viscosity for your specific motorcycle model.
Specifications
- Brand: Red Line
- Viscosity: 20w50
- Manufacturer Part #: 42504
- UPC: 083522425049
- Quantity: 1 quart
- Weight: 2.05 lbs
- Dimensions: 4 in × 3.95 in × 8.8 in
Common questions
Is this oil suitable for Harley-Davidson and Indian Motorcycle wet clutches?
Yes, Red Line 4T is specifically blended with JASO MA-compatible friction modifiers, making it safe and effective for V-twin engines with wet-clutch systems found in Harley-Davidson and Indian Motorcycle models.
What kind of performance benefits can I expect?
You can expect superior film strength, extended drain intervals, better engine cleanliness, and reliable ring seal protection, all contributing to enhanced performance and longevity for your V-twin engine.
Does this oil fit my specific Harley-Davidson model?
This 20W-50 oil is suitable for many Harley-Davidson Touring, Softail, and Dyna models. For precise compatibility, please use our Shop by Bike tool or consult your owner's manual to confirm the recommended viscosity for your specific year and model.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Red Line |
| TYPE | Chemicals |
| SKU | 57-6531 |
| WEIGHT | 2.05 lb |
