Thought this was interesting. Never knew of the Cummins B3.3 until now. 34 mpg out of a Jeep? Can't beat that!
http://www.rockauto.com/Newsletter/archives/101812.html
Dave's 1986 Jeep Comanche
This is my 1986 Jeep Comanche. It has a Cummins B3 3.3 liter diesel engine. All of the accessories are from the original 2.5L Jeep engine. The AC compressor, expansion valve, drier, all 4 shocks, and steering stabilizer have all been replaced with parts from RockAuto.com.
I travel 50 miles per day and consistently get 34 MPG! I now have over 130,000 daily driven miles on the diesel conversion. I love this truck, and RockAuto has helped me keep it going.
Thanks, Dave in Georgia