Bel-Ray V-Twin Full Synthetic 20W-50 Engine Oil 6-Gallon Bag-in-Box
For shops and high-mileage riders who go through oil faster than individual bottles can keep up, this bulk format keeps your supply ready ahead of every service. The bag-in-box spout dispenses cleanly and without waste, so every oil change is faster and cleaner, no juggling individual bottles, no running short mid-season, no compromise on the quality your V-Twin demands.
Key Features
- Bag-in-box format with easy-pour spout, no bottles to open, no spills, no waste
- Combines fully synthetic base oils with high-performance additives for large-displacement V-Twin performance
- Superior film strength provides increased protection for critical engine components
- Reduced friction decreases engine operating temperature for sustained high-output riding
- Highest Viscosity Index for stable viscosity protection across a wide temperature range
- Exceptional shear stability reduces viscosity loss over extended drain intervals
- Formulated for riders extending drain intervals beyond 5,000 miles
Technical Specifications
- Oil Type
- Full Synthetic: Synthetic Ester and PAO base
- Viscosity
- SAE 20W-50
- Rating
- API SN / Registered JASO MA2
- Volume
- 6 U.S. Gallons
- Format
- Bag-in-Box with easy-pour spout
Fitment Notes
- Compatible with all air-cooled and liquid-cooled Harley-Davidson V-Twin 4-stroke engines requiring SAE 20W-50 engine oil, no fitment restrictions
- Recommended by Bel-Ray for Twin Cam and Milwaukee-Eight (M8) Big Twin models
- Confirm your engine’s oil capacity before dispensing to avoid overfill


Kristopher Staffan –
This is an amazing deal!! Definitely the go to oil for my shop now.
Kristopher Staffan –
So easy to order. Very fast shipping. Usually received within a day. Best deal ever!!
Kristopher Staffan –
Awesome