Shell out $20 for some synthetic oil and you won't have to. The ability to pour at -65 °F is quite useful up north. I think it's crazy not to use synthetic in cold climate. About half of all engine wear is caused at startup. The other half is crap the filter can't catch.

well my dealership here included thier own free service for 3 yrs so every 3000 miles I go in for my oil changes they cover one mitsu pics up the next one had all fluids topped of and brakes checked alll free