Red Line 20W50 Motorcycle is a fully synthetic, ester-based four-stroke oil designed for the latest Big-Twin engines that specify 20W-50, including Milwaukee-Eight, Evolution, Twin Cam and similar aftermarket engines. Superior film strength for protection and ring seal, wet-clutch-compatible friction modifiers, and extended drain intervals from higher-quality base stocks; suitable for JASO MA/MA2. Case of twelve 1-quart bottles.
Specifications
| Viscosity (SAE) | 20W-50 |
| Type | Fully synthetic, ester-based, wet-clutch compatible |
| Approvals | JASO MA/MA2 |
| Size | 1 Quart (12 Pack) |
| Part Number | 42504 |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
