This is the second time I had put Amsoil in my scooter and I had to post the findings over here for my fellow scooter riders here.
The performance jump is noticable, my access now pulls pretty graciously post 60 km/h before it was more noise and less acceleration with Castrol 5w40 synthetic. You can feel the acceleration in your bum and hands when you twist the throttle after 65 or 70 which is where most if the 125 cc scooters flat out due to lack of power.
Even doing top speed for more than 1 hour in highways you will feel no vibration thats how smooth the engine+Amsoil combo is.
The smoothness of this oil with this suzuki engine is next level my friend who borrowed my scooter for a day (apache rider) said it feels like riding an electric scooter that's how smooth it is. So do try!
20w 50 Valvoline VR1 is all I use. It’s expensive but because the gearbox and engine use the same oil you need a high zinc oil and VR1 is the best out there in my opinion.
I use Amsoil SS mainly because I do long drains, over 20k Km. So the price of the oil is not a big issue.
Great oil but worth it only if you do long drains.
I run valvoline motorcycle 20w50 in the primary and crankcase and valvoline 75w140 diff in the trans.
I use Valvoline 20W 50 VR1 racing oil. It’s got a high magnesium content so well suited for the gearbox.
I literally just changed my oil today, I love it, I have been using AMSOIL directly for years now with free shipping and free membership if you spend 500 a year or more if I recall correctly.
If you want brand recommendation choose Valvoline Extended Protection 5w-20 every 4k miles.
Cummins uses Valvoline premium blue.
Similar with my Audi but with Valvoline.
I use AMSOIL signature series 0W-30 but the Mobil-1 suggested by others is totally fine — AMSOIL is awesome but is expensive.
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