So... I just had the fuel gauge on my 2006 F350 go all wonky on me a week or so ago and when I took it in to the dealership to get it checked out I was told that the fuel level sensor was bad. aranoid: Well, $804 and change later I asked the service rep what could have caused the thing to go TU on me. He asked me where I typically filled the tank because the quality of the fuel is usually the reason they go bad. When I told him that I fueled at the Fred Meyer on 19th (in Tacoma) he told me that THAT might explain it! Apparently Freddy's has cheap prices for a reason... the fuel is of poorer quality. (This seemed to be the general findings of my later Google-Fu searching as well, during the course of which I also learned about cetane numbers and so-called "Premium Diesel"). My question for all you fine folks who run diesel rigs is: Where do you get your diesel fuel and do you know of this so-called "Premium Diesel" and how one goes about locating and confirming it at the pumps? Seems like Chevron and Shell were the places who typically carry the higher quality diesel fuels (no wonder their prices are always higher), but most diesel stations don't post the cetane numbers on the pumps so it's not always easy to verify that the pricey fuel is indeed "premium diesel" (cetane from 45-55). Discuss.