I use Amsoil 0w40, the clear hose on the front frame rail should be connected to the battery vent fitting....

 

I found castrol 5w-50 synthetic, I figured that was good enough.

 

Battery vent. Just went out and found the battery vent and attached the hose.
It was never attached at the factory or during the dealer prep. Thanks.

The 2006 Hawkeye says 0W50 and I probaly need the 50 here in Arizona for the high temps we have.
I will look into the 0W40

I'm also keeping a close eye on the rear lower frame welds cracking.
I have read a whole bunch about them here. Lets hope Polaris is doing a better job now.

Thansk
Iggy in warm Arizona