Good day, I am about to have the annual inspection and maintenance, and the spark plugs will also be replaced. Currently, the Beru Ultra Titan UPT14P are installed, which will then be replaced by the original Volvo. My gas retrofitter said, and I have already read this several times here in the forum that the Volvo candles should also be the best for gas operation (CNG). My car has in the upper load range partly dropouts while accelerating, and now by changing the spark plug However, there are different opinions that you should also reduce the electrode distance from 0,8 to 0,7mm/0,65mm during gas operation in order to relieve the ignition coils in particular. I personally would prefer to leave the fingers of sensor gauge and co. Are there experiences of the LPG and CNG drivers? Did you just take the standard candles unchanged or still change the distances? If yes, this has somehow been noticeable g My ignition coils have been holding for so long now, so hardly do you think that the gas operation will let them live off much earlier. But if the lower distance allows a better ignition spark, then it would be worth considering… Thank you VG