9 years of use in a Ram factory fill, gonna do a series of flushes to try and get it back to that factory orange. I couldn't get bottom block bolt off and opted to not take off hoses, so I am doing a series of quick flushes. Poor choice in soda on this da, ha. I checked this fluid at 5 years and it was closer to the new stuff. I think this is great coolant, low risk of sludge then the oat and protects longer then iat of course. Zerex go-5 is the generic, but I used Mopar Coolant it wasn't that much more imo. That's all, just a pic to show you might not want to extend coolants past what they say, but then again it wasn't that bad either, no funky smells and still nice and clear. No I didn't do any testing of the coolant, just the pic.