Does anyone know the size of the "bolt" on the plaxtic oil filter cap on an '06 S40 in millimeters? Just bought one and want to do my own oil changes. A 1 7/16" looks close but want to get the exact size. Also, has any one thought of cutting a hole in the engine compartment plastic pan so that before you drop the oil you don't have to remove the pan? Presume there's a good reason for the pan - quietness, cooling, airflow, engine cleanliness. Don't like it but should keep it on. Opinion? Thanks.