Thanks guys. I'll check the suppressors next weekend if I get a multimeter. And I'll order NGK's for this car. And I'll send Albert my plugs....

Update: I drained about 1 Qt. of oil, and the oil level is now below the max level on the dip stick. It's drizzling in LA, so I couldn't do much else. But next week, when change the plugs with new NGK's, I'll take pics of the old Bosch plugs and see if the change in the oil level and a tank of 91 octane gas will burn off the new wet carbon deposits. And, by then, I should have new Mann air filters to replace my dirty K&Ns (I don't want to risk over-oiling) and a new fuel filter, so after a while, I'll see how the NGK's are doing....

Cheers!