Bel-Ray EXS Full Synthetic Ester 4T Engine Oil - SYN Ester OIL 10w50 4l (4/Case…

Bel-Ray EXS Full Synthetic Ester 4T engine oil in 10W-50 viscosity, formulated with 100% synthetic ester base stocks for superior film strength and protection across wide temperature ranges. Meets API SN and JASO MA2 specifications for four-stroke motorcycle engines.

Features

• 100% synthetic ester base oils
• Superior film strength for increased component protection
• Highest viscosity index for temperature stability
• Exceptional shear stability to resist viscosity loss
• Reduced friction lowers engine operating temperatures
• API SN and JASO MA2 certified

Specifications

• Brand: Bel-Ray
• Manufacturer Part #: 99160-B4LW
• Viscosity: 10W-50
• Volume: 4 liters per bottle
• UPC: 690509200294
• Weight per Bottle: 8.7383 lbs

Frequently Asked Questions

Is this oil suitable for my four-stroke Harley or Indian motorcycle?

Yes — EXS 10W-50 meets API SN and JASO MA2 specs required for four-stroke motorcycle engines.

What's the difference between 10W-50 and other weights?

10W-50 provides thin viscosity when cold (fast starts) and thick protection at high heat. Choose based on your ambient temperature and engine demands.

Why synthetic ester over mineral oil?

Synthetic ester offers superior film strength, better temperature protection, reduced friction, and longer oil life — ideal for high-performance riding.

How much oil is in a case?

This case contains four 4-liter bottles (16 liters total).

Can I mix this with other oils?

Stick with the same brand and grade for best results. Mixing different synthetic types or mineral with synthetic can degrade protection.