Just wanted to share that I decided to give Amsoil Metric 10w40
a try for the first time last week. A lot of people rave about the stuff, so I wanted to see what all the hype was about despite the exorbitant cost.
Long story short - I'm very impressed.
I was switching over from Motul 5100 which is of course a very good oil, but it never performed as well as the Suzuki dino oil that the shop used on my very first service. With the Motul I always noticed a rough idle, even at operating temp. I could actually see the tach hunt between 1000-1200rpm constantly. I'm not sure how an engine oil could influence this, but it did.
With the Amsoil, that hunting is gone. The tach now sits dead steady at 1000rpm at idle and the engine just purrs. Shifts are also smoother than with the Motul 5100, but that makes sense going from a semi- to a full synthetic. At higher revs, the engine also sounds smoother/quieter. I don't notice any change in operating temperature as yet.
I waited a few days and several rides before posting these observations to ensure that I was not going into fanboy mode. I will say that the smooth idle alone was worth the price of admission. The bike feels happier in all scenarios.
I'm annoyed because now I'm a convert... and this sh*t costs a pretty penny.
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