Bombardiers brand name oil. only have 4500 km on the sled but it works great for me.
i have my raves cleaned every year but they really don't need it.
I also have the engine aligned and have the carbs and clutches cleaned every year.
Helps when the first good snow comes. less chance of not getting to ride on it.
I've used Amsoil for 2 years now too. Last winter while on a week trip the guys following me complained about the smell, but that was after I had to use the Ski-doo synthetic. I've had the sister in law complain about the Amsoil too.
The first ride I took this year, I was following my buddy, and noticed the smell from his Amsoil. Figured I just wasn't used to it. But 60km later, when his oil light came on, we realized his oil pump was stuck wide open, and he burnt 4 L of amsoil in 60km's. Once we fixed that, I never noticed it again.
Not all oils are the same nor is the OEM oil(s) best for every engine type and size. I have seen many Polaris fans which did not like (they carbon) the current (blue) Polaris oil although the 340s seem to run very clean with it. I think the previous red Polaris oil was better for fan cooled engines while it was maybe not quite as good for the liquid cooled.
I have run both Cabela's Signature TC-W3 in one 488 fan (14,500 miles) and Citgo Premium outboard in other 488s with very good wear and engine cleanliness. The newer versions of Pennzoil: Premium Multi-Purpose outboard and their Snowmobile seem also to be good oils. Oil and gasoline deposits probably do more damage to engines than any lubrication failures. I think it is worth watching for that and correcting it by fixing any oil rate problems or switching to oils which are better suited to a particular engine. Bad oils are harder to find than good ones. Some just aren't as well suited to certain engines than others.
I found that after a 1000 miles of running Castrol regular oil, there was a lot of carbon on the face of the RAVE valves and they were almost stuck in the cylinder. With the Amsoil, the valves are still nice and free to slide.
I am using Blue Marble Oil,.. vitually smokeless and odorless. I am running it in my 02 EDGE X 700. I have cleaned my Valves now 4 times,.. and since using the Marble oil they are virtually carbo deposit free !! good stuff.http://hometown.aol.com/indymax7500/index.html
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