Just changed oil/filter in wifes E350 Bluetec. Started it up and it blew out 2 QTs. of oil in the engine compartment due to a bad O-ring in the filter housing. This was Mobil 1 Formula M 229.51 specified for this motor. Added 2 Qts. Pennzoil Ultra because it was all I had in stock. My stash is at the lakehouse. Smartmove.. Do I need to change it out ASAP? Is regular Ultra diesel approved. What a miserable filthy day....