We normally only see 4/5 days of below zero temps during the winter and it usually doesn't get much past -10 so I've never worried about using 10w30 but this year has got me thinking about next winter and switching to 5w30.
At what temp do you guys that use 10w30 start worrying about the 10w being good enough.
At what temp do you guys that use 10w30 start worrying about the 10w being good enough.