mecsw500
Member
BRP recommends 5W for two reasons .... #1.- it's what they sell .... and #2.- their oil is not FULL Synthetic ..... JMHO .... Mike :thumbup:
The synthetic blend won't affect the difference between 5W and 10W ratings though, but it is curious that BRP only specifies a synthetic blend in 5W40 especially with a 9,300 mile change interval. Like you say it is NOT fully synthetic (but nearly priced like one). A fully synthetic oil will probably better retain its quoted flow ratings over the life of the oil plus have numerous other benefits.
Outside of warranty and dealer services I will probably switch to a fully synthetic oil of the correct specification for wet clutches. I won't care about the 5W or 10W winter rating though. Until that time I'll just let the dealer use XPS and change it every 5,000 instead of 10,000 miles.:thumbup:
One point I didn't make clear in the original reply is that I implied that the oil behaved as a thicker 40 weight when it got hot, of course it doesn't, it flows quicker than when cold, but it provides the protection of a straight 40 weight oil at its operating temperature.
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