Is there a universal look up site or chart that tells me what type of coolant to use in my car? Lets pretend for example that my car was missing the owners manual and any related stickers on the overflow tank... It seems like quite a few people are asking what coolant to use in their car without overpaying through the dealer. My car came with Dexcool as the factory fill, but I have heard some horror stories regarding Dexcool. Currently it has a somewhat nasty looking green mix with some silt in the bottom of the tank. I'm replacing water pump along with the timing belt and would like to flush the coolant while I'm at it, considering half of it will drain out when the pump is removed. The car is a 2001 Catera with the 3.0 V6 also found in Saabs and Saturns. Any recommendations?