Originally Posted By: Y_K
Many still use 10W30, in fact taxi/livery fleets do with outstanding results. In my case PP required extra 1/2 quart per 1k highway miles on 2001 CVPI that does not need it anymore since return to Mobil 1.
MC is an excellent product and my vote is for MC. If I could change my oil I would go with MC without hesitation be it a full syn, mix or dino.
It is made by $Conoco *to Ford specifications*
This is the important part people forget: specifications. It does not really matter who makes what as long as it is not up to task.
All Companies will get away with anything they could unless they are presented with a list of specs. So, when somebody says that a filter is done by WIX, a battery by $Variable1, oil by $Variable2 it does not mean much unless you know the specs. Motorcraft battery is made by the same company that does Interstate yet MC has more plates and the Pb purity is specified.
Jonson Controls for the battery manufacture.
It really is up to you and how many miles you wish to go between service. I have put 5w20, 5w30, 10w30, 10w40, 15w40 in the mod 4.6 for different reasons. You aren't going to break it with 5w30, if it was mine I would use 5w20. I vote PP>MC, however price and performance goes to MC.