I hate the world. Tonight I thought I would go out and change the oil on my 2007 V6 Mustang; metric wrenches in hand. I couldn't seem to find a wrench that worked. 13mm too small 14 mm too big 1/2 too small 9/16 too big...what the heck? Either my wrenches are wrong or the plug is weird. I couldn't get under the full way to have my head right beside the plug but I was close enough. Is there some secret size that they are using to prevent people from changing their own oil now?