You do not need a fluid cooler, manufacturer's fluids maintain proper temperatures for normal operation. I have seen some stuff out there for other fluids such as Water Wetter and that product is for racing with water, not 50/50 or dexcool. So don't let their advertisement fool you. They will try every trick up their sleeve to get you sold on their product.
Like octane booster, really? It does not promote horsepower or power to the engine. All that booster does is increase the resistance to detonation or combustion and if you mix it for the wrong vehicle's gas requirements, you can actually hurt the engine. So don't be fooled by their advertising. Just stick with OEM fluids and you will be good.
2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille