Hi all on the one hand! I bought me some time ago 98er grand cherokee 4.0. runs all round, but I have a question about the oil: the chrysler/jeep dealer has put 10W40 motor oil from shell in. I have to take exactly the same from shell when refilling, or can I also take a 10W40 from e.g. ” LIQUI MOLY” (all year light running oil for gasoline and diesel engines, has the name “world champion” ? and to the gear oil (automatic): there I have no idea what is in it, but what I so like I have read, should in any case only ATF +4 in, everything else destroys the gearbox. but I will still ask what the dealer put in there. info: I drove about 1500- 2000 km since the oil change on 15.8.2006. thank you & servus from bayern