At the pump I saw a warning sticker on the diesel pump indicating that 2007 cars will be unable to use this particular fuel. What's that all about? Is diesel undergoing some radical change in 2006/2007?
We rented an 07 F250 for a club trip to ohio a couple months ago and had the same issue. We checked the owners manual and it said the engine would operate on both low sulfur and ultra low sulfur fuels, so we went ahead and filled up even though the warning said not to. It was that or get stranded between Raleigh and Akron.
All the talk I have seen lately shows that the stuff you get at the pump will be fine in any vehicle. Yes, they are reducing the amount of sulphur (used as a lubricant) in the fuel, but are required to add aditional additives (wow, three in a row!) to counter-act that before it gets sold.
Owners of 2006 and earlier model year diesel-powered highway engines and vehicles may use Ultra Low Sulphur Diesel (ULSD) or Low Sulfur Diesel fuel during the transition period. Only ULSD fuel will be available for highway use starting on December 1, 2010.
Under typical operating conditions, there should be no noticeable impact on overall power using ULSD fuel. Fuel economy may be reduced slightly because the process that removes sulfur also can reduce the energy content of the fuel.
Engine and vehicle manufacturers expect ULSD fuel to be fully compatible with the existing fleet, including 2006 and earlier model year vehicles. In some instances, the introduction of ULSD fuel to older vehicles may affect fuel system components or loosen deposits in fuel tanks. As part of a good maintenance program, owners and operators of existing cars, trucks and buses are encouraged to monitor their diesel-powered vehicles closely for potential fuel system leaks or premature fuel filter plugging during the change-over to ULSD fuel.
Like Low Sulfur Diesel fuel, ULSD fuel requires good lubricity and corrosion inhibitors to prevent unacceptable engine wear. As necessary, additives to increase lubricity and to inhibit corrosion will be added to ULSD fuel prior to its retail sale. With these additives, ULSD fuel is expected to perform as well as Low Sulfur Diesel fuel.
Sulfur is not a lubricant. The process for removing the sulfur also removes some of the lubricating qualities of the oil.The sulfur combines with water to make sulfuric acid.It has no real benifit to the fuel.
Yes, I agree. I believe that sulphur is a natural component of diesel fuel. The sulphur in diesel is a big contributor to pollution. I believe that's why the new government mandates for low sulphur fuel. However, removing the sulphur calls for extra manufacturing/refining processes, so that's why it wasn't done in the past I believe.
In other words, there's no real reason for the sulphur being in the fuel other than it's just there naturally.
The main reason the sticker is there is for the models that have particulate filters in the exhaust. If you were to run the low sulphur fule through the particulate filter, it would fill up and no exhaust flow, shutting you down. Many of the 07 vehicles do not have the particulate filter, so they can run both. At this time, the OEM's are having trouble getting it to work, so they aren't running the filters on all vehicles just yet. Have to see on the 08's. Eventually it will happen. It's about the same as the switch to unleaded.