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10W40 vs 15W50 — Which Engine Oil Is Right for Your Motorcycle?

  • Writer: DashOil
    DashOil
  • Jun 9
  • 2 min read

One of the most common questions we get is, “Boss, should I use 10W40 or 15W50?”

Our answer — it depends on your bike, riding style, and the conditions you ride in.

Let’s break it down in a simple, no-nonsense way. 🛢️ What Do These Numbers Mean?

Example: 10W40

  • 10W = Oil’s thickness (viscosity) when cold (W = Winter)

  • 40 = Oil’s thickness when hot (operating temperature)

10W40 = flows more easily when cold, smoother starts

15W50 = thicker at high temperatures, better protection in extreme heat

Motorcycle engine oil

✅ Benefits of 10W40

  • Great for most daily motorcycles, 100cc–250cc

  • Easier cold starts in the morning

  • Better throttle response & slightly better fuel economy

  • Works well in Malaysia’s warm tropical climate

Ideal for bikes like:🛵 Honda RS150, Yamaha Y15ZR, Modenas Kriss, scooters & small CC bikes


✅ Benefits of 15W50

  • Suited for high-performance or hard-ridden bikes

  • Thicker oil offers better protection in high-heat and high-RPM conditions

  • Excellent for long-distance touring, modified engines, or racing

  • Helps prevent breakdown under extreme pressure

Ideal for bikes like:🏍️ Yamaha MT-09, Kawasaki Z series, modified engines


🧠 Pro Advice :

  • If you're a daily commuter, riding stock bikes, 10W40 is perfectly fine.

  • If you’re a speed enthusiast, ride long distances or use performance mods, go for 15W50 for stronger protection.

  • Most importantly — don’t just look at the numbers. Choose high-quality motorcycle engine oil with proper certifications.


💡 DashOil Has You Covered:

🔧 DashOil E300+, E600+ 10W40 Ester– perfect for daily riders & commuters

🔧 DashOil E500+, E700+ 15W50 Ester – made for racing, heat, and high-performance bikes

✅ Final Words

10W40 = smooth for everyday rides

15W50 = strong for heavy-duty or high-performance riding

Whichever you choose, make sure your oil is API / JASO MA2 certified, and always go for a trusted motorcycle engine oil brand like DashOil.

Protect your engine, save on repairs, and ride with confidence. 🛢️🔥🏍️#BestMotorcycleEngineOil #DashOilProtects #10W40vs15W50 #RideSmartMalaysia

 
 
 

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