Bel-Ray EXP Semi-Synthetic Ester Blend 4T Engine Oil - Semi-SYN Ester OIL 15w50…

Bel-Ray EXP is a synthetic ester blend 4T engine oil formulated for air-cooled and liquid-cooled motorcycle engines, delivering high film strength and oxidation resistance across a wide temperature range. Meets API SN and JASO MA2 standards for wet-clutch motorcycles.

Features

• Synthetic ester blend with select synthetic and petroleum components
• High film strength for improved component protection
• Stable viscosity across wide temperature range
• Improved oxidation resistance
• Prolonged wet clutch life
• API SN and JASO MA2 certified

Specifications

• Brand: Bel-Ray
• Manufacturer Part #: 99130-B4LW
• Viscosity Grade: 15W50
• UPC: 690509200249
• Weight: 8.16 lbs

Frequently Asked Questions

Is this oil safe for wet-clutch motorcycles?

Yes. Bel-Ray EXP is JASO MA2 certified, which means it's formulated to protect wet clutches and won't cause slipping or glazing.

What viscosity is this oil?

15W50 — a 15-weight at cold startup, 50-weight at operating temperature. Suitable for most air-cooled and liquid-cooled 4T engines.

Does this meet Harley or Indian requirements?

Bel-Ray EXP meets API SN and JASO MA2 specs, which cover most modern motorcycle engines. Check your owner's manual for specific grade recommendations.

Can I use this in my vintage motorcycle?

Check your owner's manual for the recommended viscosity and API rating. Older air-cooled engines may prefer straight-grade oils; modern bikes typically run multi-grades like this 15W50.