Hello, Can someone please clarify this for me? Will running straight antifreeze through your car cause it to get hotter? Last week I had a coolant leak and lost nearly all of it. I didn't have any water so I fixed the leak and put in straight antifreeze.(almost 2 gallons if I remember correctly) I have left it this way because a friend said it doesn't matter at all, mixing it just saves money. Is this right? I cannot figure out why my fans are still on at 60 MPH. The needles stays just a hair above the 2nd white line and the car is not overheating but it seems to be just abit hot enough to start the fans. I have a new otterstat which turns the fans on at a lower temp(specialtauto.com) but I know they shouldn't be on at 60MPH when its only 65. I have the overheat protector installed. The water pump is fine, I checked it out when I replaced the hoses with silicone ones. Thanks list David