That's exactly what the problem was on my car. I had a puzzling oil leak, seep, about a tablespoon every 30 miles or so. Small spot under my car after sitting. I knew the leak originated near the fuel pump, but was fearing the worst, head gasket. This was one of the last of 25 pages of doing a search for "oil leak" that I read. Decided to go check those bolts, YES! I had loosened the bolt to adjust the alternator but forgot to tighten it. The others in the sane vicinity were a bit loose also. Took it for a drive, no more leak.