We have a 2005 Cummins ISX 475 HP in a 2005 Peterbilt 379 with 1,019,976 miles on it as of this evening. So far we have had excellent service out of this engine, except for having to replace at least six EGR Valves and the EGR Cooler at least twice maybe three times. Heck I can't remember that one for sure.
We use a Filtration Systems FS2500 Bypass Filter, change it every 10,000 miles and run oil samples at the same time. We usually change the oil about every 60,000 miles or so depending on the oil sample results and the amount of antifreeze in the oil when the EGR and EGR Cooler decide to act up. We have been getting higher soot levels lately so we may be heading for another EGR Valve replacement - it has been almost a year this go round.
Our fuel mileage is running 5.2 to 5.8 over the past year or so, but is on the low end right now because of the winter weather and we are pulling heavier loads now than we have been in the past. We do have an APU so our idle time is kept to the bare minimum.
Here's what we are wondering. We expect the engine to need a rebuild sometime this year. We do want to keep our truck as it is paid for and has some pretty nice murals painted on it and we just simply wanna keep her!!! So, we are wondering what it may cost us to rebuild the engine and at the same time boost our power significantly (600 - 800 hp) and increase fuel mileage. What suggestions do you have and what kind of money are we looking at? We know pretty close what a rebuild or Recon-engine will run through Cummins, but we are interested in what you folks can do for us in the power performance and fuel economy arenas.
We do run the mountains sometimes and as stated earlier we are pulling heavier loads - in the high 75,000+ range and believe the power would be most beneficial. Not to mention, power still is a big turn on even though we are getting into our late fifties! We wanna continue in this business for quite sometime to come. Not interested in running down the road at Mach 2 with our hair on fire, but we do like and want the power to let our baby run for many more years and do it with dignity.
What can you tell us, suggest for us and what kind of money are we talking about? Thanks and looking forward to hearing from you soon!