how much oil dripping is normal ?

[Steve Wastler]

a drip or two could be considered normal, but anything that is described as a puddle is not. It could be as simple as a loose or overtightened oil pan gasket, bad rear cork gasket, or there may be an issue with the rear main drain tube. Its easy enough to drop the pan and check things out, while the pan is out, clean out the sludge if it is not a recent rebuild.