DEF diesel engines

[kgard1225]

Hi, I was looking at a few used DPs and noticed one was listed as non- DEF engine. Can I get some opinions on the advantages or disadvantages of getting an older non-DEF engine ? I am only slightly aware of this DEF thing but assume it has to do with the ultra low sulpher fuel. Most of the older coaches seem to have lower HP and I am a little nervous about lack of power after reading many posts about 40 ft DPs with 300- 350 HP engines being under powered. Thanks, Ken

[JumboJet]

DEF is introduced in the exhaust stream and has no effect on engine power.

[Tom_Barb]

Diesel exhaust fluid, is an additive on newer engines to enable it to meet the new EPA standards, or IOWs to enable the Greenies to grab more of your money. the older non DEF run great with out it on ultra low sulphur fuel.