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amsoil discussion

  1. Maintenance
    Want to start using a fule addidive in my 07 GMC Duramax diesel. Heard Amsoil Diesel Fuel Additive Concentrate was good. They recommend 4 Oz. per every 5 gallons of fuel and to use each time you gas up. Any advise on this product or others you would reccomend. First time diesel truck owner...