Picked up a bottle of GUMOUT Complete Fuel System Cleaner for SUVs, 4x4 and trucks at WalMart for about 6 bucks. Supposedly treats up to 35 gallons of fuel. It then occured to me that before I put it in I should see here if anyone has used this product and if so what were the results? I also want to be sure it will not harm my Ford 4.0L SOHC engine. The ingredients are not on the bottle so I don't know whats in this product. Any information would be greatly appreciated. Thanks in advance.