Red Line 4T Motor Oil - 20w50 4t 1 QT (12/Case Sold Ea) — Harley-Davidson (1984-2006)

Red Line 4T 20w50 motor oil for V-twin motorcycles, formulated with ester base stocks and JASO MA-compatible friction modifiers for superior film strength and wet-clutch compatibility. Extended drain intervals and reliable ring seal protection for Harley-Davidson and Indian Motorcycle engines.

Features

• Ester base stock construction for superior film strength
• JASO MA-approved friction modifiers for wet-clutch compatibility
• Extended drain intervals over conventional oils
• Excellent dispersant package for engine cleanliness

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

Fitment

Suitable for V-twin motorcycles including Harley-Davidson and Indian Motorcycle models with wet-clutch engines.

Frequently Asked Questions

Is this oil safe for wet-clutch V-twin engines?

Yes — Red Line 4T is blended with JASO MA-compatible friction modifiers designed for motorcycles with wet clutches.

How often should I change this oil?

Red Line's ester base stock and superior dispersants allow extended drain intervals compared to conventional oils. Follow your bike's service manual for specific intervals.

Can I use this in a Harley or Indian?

Yes — this 20w50 is formulated for V-twin motorcycle engines including Harley-Davidson and Indian models.

What's the viscosity?

20w50 — a heavier oil suited to air-cooled and warmer-climate V-twin riding.