My car has about 31,000 miles on it, with no major problems to date. Driving is about 60% city and 40% highway at or near maximum speed limit. Noticed spots on garage floor (near front under engine)past 3-4 weeks, and oil level down about 1 qt. No warning lights have appeared on dash, no smoke or other indicators. Is this typical of loose bolts on pan....or something more serious? Thanks for your input.
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2003 Pontiac Grand Prix Question: Oil leak
Answer #1DaveJHM April 22, 2011, 23:40Master
I would not suspect loose bolts on an oil pan. I would more think of a failed seal or gasket somewhere along the way.
The diagnostic process is a visual inspection - something may appear pretty obviously. If not, a fluorescent dye can be added to the oil, and a black light can be used to see where the leak originates.