I had a call into Mike Young Cummins Northwest yesterday before the posts about Mike. Today (29 Dec 2006) I talked with Mike about the effects of Ultra Low Sulphur Fuel for older than 2007 (new engine) Cummins/Alpine Coaches. Per Mike Young:
"¢ Use same Oil and Mileage Intervals
"¢ Fuel Economy may be slightly less. May not be noticeable.
Lift Pump (12V pump computer activated by ignition switch being turned ˜on' runs to prime fuel system then shuts off 12 seconds after engine start) ISL (400) has a sealed Lift Pump and new fuel has no effect on them leaking. ISC engines have a bolt together pump and these are the ones that can potentially leak from the new ULSF fuel. The ULSF has been in use since September according to Mike. He feels if you have driven around 5,000 miles with no leak, you should be ok. Cummins where he works in Yakama has only changed 5 lift pumps on ISC engines since September all trucks. The pumps can also fail from other causes besides the new fuel. He said Cummins also isn't stocking any additional pumps as they don't expect an increase in failures. Also there is a gasket/o-ring kit available but didn't know if they were in stock yet. He felt the couple places that have installed lift pumps most likely had the pump in stock and not the kits. Wanted to pass this info along, hope it helps.
FYI .... Mike Young has been over to WRV within the last week and they are building coaches again having started about two weeks ago. Cummins delivered an engine last week.
D & D Rich
2004 Alpine 40 FDTS