Posted by Brian Jasper co. Ia on December 08, 2008 at 11:02:49 from (65.121.139.196):
In Reply to: Duramax Diesels posted by SDGREEN on December 07, 2008 at 20:30:12:
The Dmax has a 100k warranty on the engine. All diesel engines produced beginning on 1-1-07 have the particulate trap. Depending on how you drive your DPF equipped truck has alot to do with mileage. The guy who doesn't need a diesel engine will usually see the lowest mileage due to active DPF regeneration. The guy who makes his diesel work a little all the time will rarely have an active regeneration occur and will have better fuel mileage. Thumb nail sketch is it takes extreme heat to burn the soot in the trap. Under heavy loads the exhaust is hot enough all on it's own. Light usage, short trips, putt putt driving around town the exhaust never gets hot enough on it's own to burn the soot in the trap. An active regeneration dumps fuel in the exhaust stroke heating up the exhaust dramatically to burn the soot. Don't leave your diesel pickup idling in a field of dry grass, stalks, etc. I've heard stories of fires being started by the extreme exhaust temps.
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