Now I KNOW this is not the proper way to do things, however.... I was helping my Dad change oil in his '96 Buick 3.1L, and we noticed some condensation around the fill cap. I am fearing this may be coolant since this is the dreaded GM 60 deg engine. Can I just pull the filter and collect my UOA sample from there, or do I need to dump the new oil? I am not worried about accurate insoluable readings... just looking for Potassium and Sodium. If this is a bad idea, let me know why.