Review on Lubegard 30916 Heavy Engine Protectant by Joseph Elvis

Calms down the notorious grille flicker in my 2014 Mustang GT. It's still there, but a lot less noticeable than before. Changed all fluids and added Lubegard to the oil, manual transmission and rear differential and noticed a 1mpg improvement on the freeway. Happy with the results and will continue to use Lubegard with every oil change. This is one of the most expensive oil supplements on the market, but I don't mind paying a little more for one that works.