Jo som regel.
Der stod ikke noget i første indlæg om røg eller lign.
Her er en generel forklaring på stempelringe.
Problems with your car engine's piston rings often display symptoms or signs that are similar to other problems with low compression in a vehicle. While the following symptoms are not always attributed to faulty piston rings, they are a good indicator that you should check the rings for wear and to see if they need to be replaced. Here is a list of the most common symptoms for bad piston rings:
White or gray exhaust smoke
Excessive oil consumption
Low power for acceleration
Overall loss of power or poor performance