My Cobra has 2500 miles, so I decided to change the plugs. It has a 427 Genesis sideoiler, Holley 850 CFM carb. Runs great - no complaints. Seven of the plugs had a nice dark tan color. No significant carbon or
oil.
But one was black and grimmy. The car uses about a quart of
oil in 300 miles. No
oil leaks whatsoever (hard to believe!). Any ideas why? Should I be concerned about that one nasty looking plug?
Chuck