Was changing my oil and noticed i bought a Fram PH7371 instead of a PH6603 for my 2002 Spec V. Weird thing is that the PH7371 is for the QR2.5 and the PH6603 is for the 1.8 and the Spec V 2.5?? Should I just use my PH7317 and more oil? they look identical except the 6603 is shorter. Help!!!