95 oil leak u engine 2wd

95 2wd tracker 30,000 miles (clean and low miles) running syntheic oil as always small oil leak at rear of engine I think it is at base of distributor . any body run into this and what was the solution? 25000 of the 30000 miles have been in the last 3 years this is the first oil leak which started a month ago. most reliable vehicle i have ever owned.