I have a 1991 Mustang 5.0. My mustang has a slight radiator leak. My low coolant light was on and I filled up the resevoir. 3 days later the light came back on. The resevoir is empty again. I checked the radiator and there is a very small leak. I have been driving it for 1 month now with the low coolant light on and everytime I check it the radiator is almost full. I see where the leak is in the radiator. It is in the top fin of the radiator. It is to cold out now to replace the radiator. Has anyone had good luck with stop leak or another brand. I have heard this stuff is bad to use. I just need a temp fix. Let me know everyones opinion. I just want that low coolant light off for now but I do not want to unplug it. Thanks Travis