As long as you're here, I have a question. I've been poking around trying to find an answer and haven't come close.
When I run my car over 3,500 RPM (this is a guess based on engine sound since I don't have a working tach), I have a very slight odor of burning oil. Now I DID overfill the sump a little after the last oil change and I'm wondering if that's the problem. So far, I have noticed very little or almost no oil consumption over the last 1,000 miles... the dipstick still reads slightly above full and the color is not too dark or burned.
I've been driving around town in third gear (40 MPH) at a moderate engine speed. If I speed up to about 50 in third, then I notice the smell after a short while. I reserve fourth gear for anything above 55 MPH since I tend to speed in fourth gear. The car feels comfortable in third gear and runs fine other than the smell.
I still think my oil separator may be clogged. I reconnected it and adjusted the carburetors to run with it attached. Aside from the rear carb running lean, the car runs just fine. Also, I used 10w-30 Rotella for my oil change while I think the Bentley manual calls for 20w-50.
The plugs were clean and normal-looking when I replaced them the other week. The oil smell has been continuous the entire time I've owned it.