A good quality chain will last for a long time... if you look after it. Even top quality chains degrade very quickly in the karting environment if not properly cared for.
Cleaning chains with petrol seems effective, until you get out onto the track and the petrol comes flying out of the crevices in the chain and removes most of the lubricant!
Maxima chain cleaner is specially formulated to clear the chain of foreign particles which rapidly reduce its service life, and then evaporating away to allow the next layer of lube to properly penetrate and lubricate the chain. Regularly cleaning and properly lubing your chain is the best way to maximise the lifespan of your chain.
Works with both standard and O-Ring chains.