Surprised to see someone suggest sears automotive as trust worthy.
Recent news story (last week) sighting yet another example of sears automotive being sued for ripping off public.
check out this link
http://srd.yahoo.com/S=2766679:WS1/R=5/K=sears+automotive+law+suit/T=1034558867/F=dd4a36f024b1bbf50f4b52a42c58a231/*
http://www.crmdaily.com/perl/story/19652.html
Probably won't be in the automotive repair business for much longer.
Joel