Went to the local welding supplier yesterday, parked my 06' F-350 6.0, next to another 05' F-350 6.0, went into the shop, asked the guy if it was his truck (it was)and How he liked it,,Welllll, he kind chuckled,,,she's having turbo troubles ,,at around 4k miles first turbo went bad,,,now at 7500 miles he said making the same noise !

I said Hmmm,,,,, My truck will have 19k on it today,,and not a problem !

I said to him,,so you only have 7,500 miles on a 05' and you bought it new ?

He says yes I bought it new.

I said ahh I think your pretty truck sits to long,,and the turbo is rusting up,, I said I usually put my foot into my truck at least once a day while driving it, to bring that boost write up,,kinda like excercising those variable vanes,,,He says you know you maybe right there, he admitted he does drive his other 1 ton 7.3 truck more.

Oh and another thing,,,he has only run red diesel in it for the last 3 yrs,,,I am like,, wow maybe that one reason,,,but told him its good to know the 6.0 will run on it.

He said he his oil man, that brings his fuel,,said Dan (ficticous name)when I go to the supplier, to fill my fuel truck,,,it all comes out of the same tank,,just they dump the dye in my truck when filling !!! Now whats everyone got to say about there ULSD now LOL ?????

 

I think you have something here. My truck sits for long periods of time. I have about 13K on my 2004 today. My 1st turbo let go on the California 'Grapevine' 11/2 ago at 6K draging a boat, it wasn't pretty. In Lodi CA. the dealier put in a NEW turbo. The variable vanes had 'Been a Problem' according to GrenWeki Ford in Lodi. Now at 13K the other day going uo a log hill by the house I taged it for 1mile to 1mile and a half. Everything good. On the second stab it fell on its face and bucked and spued smoke with no power, like the turbo let go again. A couple hours later when I left my buds house... I went to the bottom of the back side of the hill turned around and planted it.. the truck ran good with the turbo kicking in and burning rubber.
I went to Ford..Don Knott in Carson CA. and they sugessted cetane by Motorcraft in every tank. I bought 5 bottles and dumped one in a full tank. Possibly carbon or like you said a rust build up..maybe the low sulfer? Anyway, I have driving the truck this last week like I hate it. And like you said..tagging it to make the vanes WORK. So far so good. I aslo believe the truck NEEDS to be driven as much as possible. It is no like gasoline. You can't leave the fuel in the tank for long periods as it will not be 'Fresh'
Turbo Gus

 

Be careful running red diesel, not sure about other states, but in Arizona.....if you are caught with it, they can fine you for EVERY mile on your truck. I once saw a contractor go bankrupt that got popped with all of his trucks running red diesel.