I have a 2011 JK CRD and have been experiencing this frustrating issue for a long time now.. thought i would use google and landed here. I always thought it was the bowser, each company looks to use different bowsers.. but during my frustrations this morning i pulled the nozzle almost out of the fill tube and let it just flow at a slow rate into the filler and i noticed it was foaming and bubbling back up the filler. Some 15 minutes later i had managed to get 40 litres in
Off to the dealership i think.