Bel-Ray EXP Semi-Synthetic Ester Blend 10W-40 4T Engine Oil - Harley & Indian V-Twin
About Bel-Ray
Bel-Ray has manufactured motorcycle lubricants since 1948, with V-twin specific engine, primary and transmission oils formulated for air-cooled operating temperatures.
Bel-Ray EXP Semi-Synthetic Ester Blend 10W-40 4T engine oil is formulated for the unique demands of both air-cooled and liquid-cooled V-twin motorcycle engines. Its ester base provides superior film strength and oxidation resistance, critical for engine longevity.
Why riders pick this
- Ester blend for superior film strength
- Protects air and liquid-cooled V-twin engines
- Stable viscosity across wide temperature range
- Enhanced oxidation resistance for longer oil life
- JASO MA2 certified for wet-clutch protection
This 10W-40 viscosity oil maintains stable performance across a wide temperature range, making it an ideal choice for a variety of riding conditions on your Harley-Davidson or Indian Motorcycle. It ensures your engine is protected whether you're cruising or pushing the limits.
Advanced Protection for Demanding Engines
- Synthetic ester blend with select synthetics and petroleum components for balanced lubrication
- High film strength provides improved component protection under heavy loads
- High viscosity index ensures stable performance across extreme temperature variations
- Improved oxidation resistance extends oil life, reducing breakdown over time
- Prolonged wet clutch life on friction-plate designs with JASO MA2 certification
Reliable Performance for Every Ride
Bel-Ray EXP 10W-40 is designed for riders who demand consistent, reliable performance from their engine oil. Its robust formulation helps prevent wear and tear, maintaining optimal engine health and ensuring smooth, responsive clutch operation. Trust this blend to keep your V-twin running strong.
Specifications
- Brand: Bel-Ray
- Manufacturer Part #: 99120-B4LW
- UPC: 690509200225
- Viscosity Grade: 10W-40
- Type: Semi-Synthetic Ester Blend
- API Rating: SN
- JASO Rating: MA2
- Weight: 8.02 lbs
Common questions
Is this oil suitable for both air-cooled and liquid-cooled V-twin engines?
Yes, Bel-Ray EXP 10W-40 is specifically formulated for use in both air-cooled and liquid-cooled four-stroke motorcycle engines, including those found in Harley-Davidson and Indian Motorcycles.
Will this oil protect my wet clutch from slipping?
Absolutely. This oil is JASO MA2 certified, ensuring it's designed to prolong wet clutch life and provide proper friction without causing slip or glazing, which is crucial for V-twin performance.
How does this oil handle extreme temperatures?
Thanks to its high viscosity index, Bel-Ray EXP maintains stable performance and a consistent oil film across a wide range of operating temperatures, offering reliable protection in various climates.
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 | Bel-Ray |
| TYPE | Chemicals |
| SKU | 840-1613 |
| WEIGHT | 8.02 lb |
