The oil leak that my '95 Outback (EJ22 engine, 167,000 miles) suffers from seems to be getting worse. I'm not adding a quart every week, but I'm adding a quart every 1000 miles instead of just before an oil change as before when the leak wasn't as bad. A lot of it seems to depend on the driving being done, and I've made these observations:
Relaxed driving causes little or no oil loss. However, frenzied driving and sustained high speeds will cause oil loss, often to the point of causing smoke to billow out from under the hood at a stop. It seems to be linked to engine RPM, where keeping the revs at over 3000 for any length of time causes the oil to leak and eventually burn off on the hot bits. 70 MPH seems ok as far as oil loss goes, but if I'm not stuck in gridlock I'm stuck in a pack of wild SUVs doing 90-100 and they'll run me over if I so much as take my foot off the go pedal. :(
Any ideas on the most likely spot for a leak, given that it only happens at high RPM/speeds? There are no driveway drips and since the engine is completely coated with oil I can't tell where it's coming from.
-Matt