Also the exhaust pipe is smoking with a smell of Gasoline. What could be the most probable causes of the oil in spark plug #6 and the strong gasoline smell out of the exhaust pipe?
The cylinder isn't firing.When it goes dead the oil in the cylinder doesn't get burned like it should so it causes the plug to get oily.That oil gets pumped into your exhaust manifold along with the un burnt fuel and causes the smell and the smoke.Try new spark plugs and make sure the plug wire is good.It could be the coil too.
1. injector could be sticking on #6
2, plug isn't firing because of oil, so unburned gas is passed out the exhaust
3. plug needs changing
4. rings are broken
5. valves messed up