Front engine oil leaks can develop from the camshaft seal and the crankshaft front seal. If one or more seals require replacement, it may be wise to consider replacing the timing belt as well. These seals are commonly inspected and replaced as needed as part of a timing belt service.
Car Problem Reports
Subaru Impreza Outback Engine Oil May Leak From Camshaft/Crankshaft Front Seals
Subaru Impreza Outback Problem
Engine Affected: 2.2L 4 Cylinder
Average Mileage: 183,500 mi (167,000 mi - 200,000 mi)
Visitor, 2000 Subaru Impreza Outback, 2.2L 4 Cylinder, 200,000 mi
Massive oil leak from the crankshaft/camshaft cover. Most likely the seals