Originally Posted By: Chris142
The chemical flush is a waste of money.
The Prestone Super Flush is a citric acid based product, according to the MSDS that I found via a quick Google search. I thought the citric acid based flushes are effective for preventive maintenance. Doesn't Mercedes require the usage of a citric acid based flush?
Originally Posted By: Kestas
For a car that has what appears to be a cooling leak somewhere, it may be a good idea to flush out all of the Dex-Cool and use something else, like G-05 antifreeze. I believe most of the problems with Dex-Cool occur when there is a leak in the system.
The Prestone All Makes All Models Coolant that I have in there right now seems to be fine (it's a Dexclone), so I'm not sure if I should switch. I'm planning to fill it with Prestone Dex-Cool this time (the GM licensed version) since it's on sale. If I fix the leak, shouldn't the Dexcool be just fine? I'm afraid to use the G-05 coolant as I'm not sure if GM approves the usage of coolants containing silicates. I know for a fact that Saturn's green coolant was phosphate-free, but I'm not sure about the silicates.