Uploaded January 2015 | Updated September 2026, 2 weeks ago
I used this bottle of BARDAHL No-Smoke plus Stop Leak at in My Mercury Grand Marquis car (151,000 miles). I use this thick additive to stop the leak and it seems to work so far. You can find one at Amazon (affiliate link): amzn.to/2rgF3Xx
There was a slight motor oil leaking into engine cylinder number 8 causing the spark plug to become foul which causes misfires. The bottle's label reads: Concentrated double action formula reduces exhaust smoke and stops oil leaks. Improves power and performance.
Bardahl's original no smoke formula works better than other products to stop exhaust smoking by preventing oil getting past valves and piston rings into the combustion chamber. Now a new synthetic chemistry restores body and pliability to dried out seals and reduces oil leaks. No Smoke Plus Stop Leak also restores compression and quiets noisy lifters.
Directions: At each oil change add to crankcase 8oz for 4cyl ; 12oz for 6cyl ; 16oz for 8cyl. Between oil changes add sufficient No Smoke Plus Stop Leak to control smoke emissions. Do not overfill. Only add No Smoke Plus Stop Leak to an engine that is idling at operating temperature.
I used this bottle of BARDAHL No-Smoke plus Stop Leak at in My Mercury Grand Marquis car (151,000 miles). I use this thick additive to stop the leak and it seems to work so far. You can find one at Amazon (affiliate link): amzn.to/2rgF3Xx
There was a slight motor oil leaking into engine cylinder number 8 causing the spark plug to become foul which causes misfires. The bottle's label reads: Concentrated double action formula reduces exhaust smoke and stops oil leaks. Improves power and performance.
Bardahl's original no smoke formula works better than other products to stop exhaust smoking by preventing oil getting past valves and piston rings into the combustion chamber. Now a new synthetic chemistry restores body and pliability to dried out seals and reduces oil leaks. No Smoke Plus Stop Leak also restores compression and quiets noisy lifters.
Directions: At each oil change add to crankcase 8oz for 4cyl ; 12oz for 6cyl ; 16oz for 8cyl. Between oil changes add sufficient No Smoke Plus Stop Leak to control smoke emissions. Do not overfill. Only add No Smoke Plus Stop Leak to an engine that is idling at operating temperature.
