ULSD = quiter engine
The last two tanks of fuel I have put in my old LB7 have been Shell's Premimum ULSD. Right away after driving a few miles from the station at the first fill up I noticed the injector noise seemed to almost dissappear. When running the LSD the engine is louder.
Anybody got any clues ? Does the ULSD burn at a faster rate than higher sulfur diesel? I put the same amount of PS additive in both at each fillup, so I wouldn't think that had anything to do with it. The engine seems to labor a bit on regular LSD and knock a little louder even when crusing, but with the ULSD it seems to run more free, accelerate easier, and you have to listen carefully to tell its a diesel. Why?
02 2500HD LT D/A SB CC 4X4 BLACK, Westin stainless nerf bars, BW GN Hitch,Racor 60S post oem fuel filter, Oil Guard bypass engine oil Filter. All synthetic fluids. Kennedy boost valve, edge, Modified air intake,EGT & Boost digital gauge,TransferFlow combo fuel & tool box, Air Lift Suspesion Bags Rear & compressor with remote, Bilsteins front & rear, Frontier front replacement bumper.