23rd Mar 11 Please add this to your testimonials. Jeep Cherokee 2.8CRD 2009. Green box. I was sceptical when I first bought this unit, thinking its bound not to work well for me”….BUT IT DID. Was getting 33MPG average before I fitted it and nowI am getting 40MPG. Over 20% increase. Have turned it up 2 clicks from factory setting. The increase in performance from the engine is excellent. Much much faster response and pick up. Just like my old 4.0 L petrol jeep”