Hi, The manual for our new ION-3 QC says the oil filter needs either a 32 mm (1.25 in.) shallow socket or a 14 flat 68 mm oil filter wrench. I'd appreciate some feedback from someone who's done this before as to which one is preferable. Also, does anyone have an opinion at what mileage to switch to Mobil 1 synthetic? I was thinking of switching right at 3,000 miles. Is that too soon? TIA Bill K.