Hi i would just like to ask what are the possible cause of oil leaks, because i have noticed a minimal oil drips from under our car just right below the alternator.
The AC compressor is below the alternator, so it could either be engine oil or compressor oil. If it's compressor oil, that's obvious. But if it's engine oil, check the timing belt cover if oil leaks out of it. If so, baka kailangan na palitan yung seals. If you haven't replaced the timing belt, it's just the right time to replace it as well as the oil seals there.
Other than that, it may be as simple as oil surrounding the oil filter. Have it cleaned thoroughly and check back after a week, see if fresh oil has leaked out once more. If so then you have a leak, if not then it's just dried up oil that you see.