I have a 2013 Impala with a 3.6 LFX engine at 102k miles and want to change the coolant. I was at Walmart looking got a concentrate coolant instead of 50/50 mix and saw they sell Supertech concentrate Extended Life 150,000 mile coolant. It doesn't say Dexcool anywhere on it but says compatible with most antifreeze regardless of color. Is this Dexcool equivalent or do I need something else?