Need help reading my spark plugs.
These are the Ford Racing "M50" zero heat range spark plugs, they were installed at about 24,000 miles when the blower got installed.
Car now has about 32,860 miles on it.
Pulled them today, replaced them with NGK 6510's
Engine runs smoother, but the oil on most of the plugs' threads worries me.
Is the oil normal on forced induction engines?
Engine doesn't burn any oil, oil was changed about 800 miles ago, oil level is the same as right after the change.
These plugs were removed after the car was driven about 15 minutes then it sat with the hood up for about 2 hours to cool off.
So is it condensation or oil or what?
And how do the plugs look?
Thanks in advance to all that will help.
And just because, an old and a new plug:
These are the Ford Racing "M50" zero heat range spark plugs, they were installed at about 24,000 miles when the blower got installed.
Car now has about 32,860 miles on it.
Pulled them today, replaced them with NGK 6510's
Engine runs smoother, but the oil on most of the plugs' threads worries me.
Is the oil normal on forced induction engines?
Engine doesn't burn any oil, oil was changed about 800 miles ago, oil level is the same as right after the change.
These plugs were removed after the car was driven about 15 minutes then it sat with the hood up for about 2 hours to cool off.
So is it condensation or oil or what?
And how do the plugs look?
Thanks in advance to all that will help.
And just because, an old and a new plug: