2006 isx 600

[copperoaks]

I am looking at buying a 06 Signature with the ISX 600 motor. What are the problems with this motor and fuel mileage?

[Ann n Gene]

Big engine, big thirst, GREAT engine, poor mileage. Great performance, reliability and long lasting. Mileage likely 5-6.5 range. Last forever if you take care of it and pull any mountain in high gear or close. Just my opinion. Good luck.

[Triker56]

Peak Torque 1850 @ 1400 RPM
Governed RPM 2100
The ISX braking system (Intebrake) comes standard with every engine and provides driver comfort and control while reducing service brake wear. The combination of the Holset Variable Geometry Turbocharger (VG Turbo), dual overhead camshafts and integrated electronic control of the engine fan results in over 600 braking horsepower.

Fuel mileage 6 to 7.5

[dlovitt]

Quote:

Originally Posted by copperoaks I am looking at buying a 06 Signature with the ISX 600 motor. What are the problems with this motor and fuel mileage?

5.6 to 8.0 MPG @ 62 MPH depending on the wind. 14 GALLONS of oil to change every 15,000 or annually.

[spike45]

Quote:

Originally Posted by dlovitt 5.6 to 8.0 MPG @ 62 MPH depending on the wind. 14 GALLONS of oil to change every 15,000 or annually.

If you are changing oil at 15,000 per maintenance manual, you fuel mileage must be below 5.5 MPG. That classifies you as Severe Duty. How is that with a motor home? You pull a big trailer? Drive fast? Like charging up mountain passes at 75 MPH+? The ISX 600 can certainly do those things and more. Per Cummins Quick Serve On Line, an ISX oil change is based on fuel mileage. Most on-highway trucks weighing 80,000 pounds are able to safely achieve 25,000 miles sevice interval when fuel mileage is in the 6 - 7 MPG range. Above 7 is the LD range of 35,000 miles. The 2006 is an EGR engine but no catalyst muffler. The ISX currently is the most predominant HD engine in use. In HD applications, ISX engines commonly achieve operating life of 800K + miles. If you get one, use CI-4+ engine oil. The current spec CJ-4 oil is not as robust in formulation as it is meant to be used with engines using diesel oxidation catalyst muffler. Starting in 2007 DOC was introduced. If you elect to use CI-4 oil, Chevron Delo 400 is an excellent choice. I believe that ExxonMobil still produces Delvac 1300 Super in CI-4. Shell does not offer CI-4 any longer.

For service there are many Cummins distributors plus many OEM dealers like Kenworth, Peterbilt, Volvo, International who also can do Cummins authorized repair and warranty.