I'm nearing the 5 year anniversary of Dexcool and the dealer recommends doing a Flush and Fill. I've noticed a little sludge buildup (more like a waxy silicone sludge) in the radiator neck where the coolent doesn't reach... there have not been any coolent leaks or loss of coolent in the car.
Several options here ....
The dealer will flush and fill the system for $ 225.00 He wants to continue using Dexcool.
Another shop will completely flush and refill the system with the green stuff...ethylene glycol. Cost will be about $200.00
Looking on the web, I found propylene glycol, which is biodegradeable. I'm thinking about draining and flushing the system myself and using this
I like the fact that propylene glycol is much more environmentally friendly than either Dexcool or Ethylene Glycol.
Any good advice here ???
Thanks !!
Peter