thornbirdguy
New member
i changed the oil in the truck the other day(yes, i call my bronco a truck).i have no clue what oil the previous owner used, but i have been using pennzoil 10w-40. well, for the first time i went with a k&n filter. now whenever i start it, it knocks for a few seconds and then goes normal, like when you first start it after an oil change. does the k&n have a bypass valve for cold oil startups? it doesn't just do it first thing in the morning, but every time i start it. the pressure has also dropped quite a bit(still have a factory gauge...only goes up to O or R in normal, used to go up to M ). 1 dry start when you first change the oil is bad enough, but now it dry starts every time. what can i do here? would switching to 20w-50 help any?
