However i have a question. There was not much fluid that came out of the stock cooler, maybe because the truck had sat all day. As in maybe 8oz came out, around enough to fill a small glass perhaps. Started up the truck and checked the fluid and it was still in the normal area. But i know this cooler will hold more, alot more, so do i need to add any? Or just let it run for awhile longer as in take a trip to the store then check it? or am i fine until tuesday when the stall goes in and fluid changed?