1991 Honda Accord cranks over and won't start.

My 1991 Accord won't start, it cranks over
but does not start. So far I have checked
the relay switch, also check my fuel pump
which are bolth good. So I went to see if I
had spark and no spark. I replaced the
spark plugs and when doing so. I found oil
comming up the the number one slot. I
bought new gaskets and replaced them.
Also tested my distributor and it says that
it's good? Any idea for what could be the
problem.