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If i pull my spark plugs. there is oil leaking down the threads of the plug - pretty bad too on at least two.
I changed the gaskets, but i still have the issue.
Since i am screwing in the plugs, this seals the hole and keeps any oil from entering the combustion chamber though - correct ?
That's the only thing that I can think of that would make the exhaust smell like oil.
So if I were to run an engine with new oil, versus old oil, the emissions will be worse with the old oil ?
If so, why is this ?
What exactly causes an engine to produce more poison emissions ?
"Motor oil has additives to counteract acids from blowby. Those additives get used up.
If you had an engine with really good filtering, analyzed the oil regularly, and added additives as needed, you could run the same oil forever. It's cheaper to just change the oil, though. "
So if I understand correctly, an engine will produce more emissions once additives in the oil are used up ?
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