Mornin Boys, We all don't use the stock oil filters, so here is something to remember,
info from
Mobile One
Question:
Reason for Check Valves in Engine Oil Filters
What is the function of a check valve in engine oil filter?
-- Shafeeq Bandagi, Bloomfield Hills, MI
Answer:
The check valve function is used to prevent dry starts that could occur if the filter was allowed to drain dry during standing. It also serves to ensure that oil is always present in the filter, especially when the vehicle is started.
I use the Purolator PL14610 oil filter, not the P14610. that one don't have the check valve in it. I also use the Mobile One 0-40 oil and any good synthetic tranny fluid for the tranny. The only thing I use from Polaris it the front Hilliard tranny fluid, There are a few good oil filters you can use, just make DARN sure it has the check valve in it. Our oil filters are on the side, not the bottom,,
Oil check valve info,, 
Linear Mode
