Chevy and GMC Duramax Diesel Forum banner

fuel additives zmax

  1. Z-Max

    Alternative Fuels Diesel Additives Lubricants
    just wondering if anyone has used this product and their opinion, gasoline or diesel. i bought a combo pack the other week for my van, it seems the fuel formula cleaned and helped with the mileage but i have not changed the oil yet to try the engine formula. the engine formula makes me a little...
  2. Zmax

    Alternative Fuels Diesel Additives Lubricants
    What do y'all think of thiss stuff?:cool:
Top