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I just changed the oil on my '05 to Amsoil's 5w30 HDD oil. Previously I was running M1 Turbo Diesel Truck 5w40 which performed very well. In fact, when I pulled the Geno's magnetic drain plug with 10K miles on the oil, there was no residue on the magnet at all. I decided to give the Amsoil a...

After my experiences with injector issues, I'm more convinced that the failing injectors have to do with the lack of lubricity in the fuel than with the filtration... though the stock filtration should be better. I'm going to add a 2 micron filter to my truck. With my second set of...

I'm betting they tested the Amsoil DEO 5w40 CJ oil and/or the Amsoil AFL 5w40 European oil made for the VW TDI 505. 01 spec. Neither would be optimum for the 5. 9 CTD. I'm getting ready to change to the Amsoil HDD 5W30 at my next oil change. I'm currently running M1 Turbo Diesel Truck 5w40...

Some people say to add 1quart for 35 gallons. That works well on my truck, though I notice I get good results adding just 16 ounces. If that doesn't help unstick the injector, let the dealer replace them under warranty and continue using a lubricity additive thereafter so that it doesn't...

It sounds like a sticking injector that's leaking down when the engine is off. Fuel drips into the piston bowl. You get white smoke and rough idle until it burns off. Try adding some 2-stroke oil to your fuel and see if it improves. If that doesn't fix it and your truck is under warranty, take...

I drained the fuel filter cannister into a catch pan. There was no water that I could see.

My truck with 39K miles was starting rough with a billowing cloud of white smoke. I was sure I had a leaking bad injector. I described the symptoms to my dealer service advisor and he told me to bring it in for a new set of injectors. This weekend I changed the fuel filter just to see if that...