I purchased an 86 Carrera last summer with about 85k miles. I had a PPI performed that showed very good leak down and compression. Thought I was in good shape, but oil consumption may be higher than recommended. I say 'may' because I have been chasing a few leaks - return tubes, valve covers, etc. - that have prevented me from getting a good number. Plus, I have only put about 1,800 miles on it since the purchase.
The PO told me that he replaced the plugs just before I purchased the car. Quite frankly, I wasn't smart enough to ask about his oil consumption, but don't know if I would have gotten a straight answer anyhow. I pulled a plug today to see what it looked like. It has 1,800 miles on it, so relatively new.
This is my first Porsche, but have done lots of tune-ups over the years. The electrode (greyish brown) and insulator (fairly white) look pretty normal to me. I wasn't certain about the darkness at the base of the plug, just before the threads start. The dark deposits flaked off when I scratched them with a blade.
I'd appreciate anyone's thougts, I never cease to be amazed at the collective knowledge of this board. Thanks.
