1. How often does DPF regeneration occur? This depends on the application. City cycle driving (stop and go) with a lightly loaded truck can require active regeneration every 300 - 400 miles. Highway driving or higher load applications may never require an active regeneration because the exhaust will be hot enough (600 degrees F+) to regenerate the diesel particulate filter passively.

2. How is the driver of the truck notified that regeneration is occurring? The driver will not know. Active regenerations will occur over 17mph and the driver will not be alerted or notice any change in performance. Active regenerations will last 15-20 minutes.

3. How is the driver notified that a parked regeneration must occur? A large number of applications will never require a manual parked regeneration. Just in case, there will be a series of lighting alerts on the dashboard that will alert the driver of the need to manually regenerate. The driver will have several hours of operation to respond before any de-rate of the engine will occur.

4. Will the driver be able to shut off the engine during a regeneration cycle? Yes.

5. What would happen if the engine were shut off during a regeneration cycle? The regeneration would not be complete and some soot build up may still exist in the DPF. Regeneration would resume when the pressure sensors indicate it is again required and when operating conditions permit.

6. Does International offer a "limp home" mode like other manufacturers where the driver can ignore a stationary regeneration request until they reach their destination? Yes.

7. In what applications would stationary regenerations be most common? Applications that have short duty-cycle, light loads, low engine horsepower/torque requirements, and periods of idling will require a stationary regeneration more often then an application that has longer duty-cycle at high loads that require the engine to work at higher horsepower and torque. These conditions would have to be repeated day after day. Idling generates less soot so it will take a longer time for a build-up requiring regeneration to occur.

8. What exhaust system and exhaust gas temperatures should be expected? Exhaust system touch temperature is expected to be 900°F. The exhaust gas temperatures can reach 1250°F, but should be mitigated to less than 800°F exiting a TCD.

9. Can modifications be made to a 2007 exhaust system? Modifications can only be made after the DPF, please refer to G-2481 for International Truck and Engine Corporation's guidelines for 2007 exhaust modifications.

10. Is it really necessary to use the new recommended SAE CJ-4 engine oil in 2007 engines? Yes, because the SAE CI-4 plus oils contain higher levels of sulfated ash, phosphorus and sulfur (SAPS), they may cause increased plugging problems in the diesel particulate filter (DPF) and reduce the filters' efficiency, possibly resulting in engine damage and voiding the engine warranty.

11. What happens if Low-Sulfur Diesel Fuel is used instead of the recommended Ultra-Low-Sulfur Diesel Fuel? Miss-fueling once or twice won't create problems; however, continuous use of diesel fuels containing more than the recommended 15 ppm of sulfur will cause a poisoning effect of the catalyst in the exhaust system and ruin the emission system, causing the vehicle to break down with costly repair implications and void warranties.