Mineral, Semi‑Synthetic or Fully Synthetic?
- Fully Synthetic: Best for modern high‑performance motorcycles.
- Semi‑Synthetic: Ideal for touring and everyday riding.
- Mineral: Suitable for older engines and air‑cooled V‑Twins.
JASO – Why Car Oil Damages Motorcycles
- JASO MA / MA2: For motorcycles with wet clutches.
- JASO MB: For scooters with dry clutches.
Viscosity – What 10W‑40 Means
- 10W: Cold‑start flow.
- 40: Operating temperature thickness.
Quick Guide
| Bike Type | Viscosity | Oil Type | Spec |
|---|
| Sport / Track | 5W‑40 / 10W‑40 | Fully Synthetic | JASO MA2 |
| Touring / Adventure | 10W‑40 / 15W‑50 | Semi / Fully Synthetic | JASO MA2 |
| Custom / V‑Twin | 20W‑50 | Mineral / Synthetic V‑Twin | MA2 / Harley Spec |
| Scooter | 10W‑40 | Scooter Oil | JASO MB |
FAQ
How often should oil be changed?
Once a year or every 5,000–10,000 km. MX/Enduro: every 5–15 hours.
Change oil before or after winter storage?
Before storage. Old oil contains acids that can damage internal components.
Can I mix brands?
Yes, if viscosity and JASO match.