clean the chain in a slovent eg kerosene or citrus with an old toothbrush.
Dry
apply a modern bike lube, one drop per link, on the upper face of the lower run
old fashioned bike oil attracts more dirt than modern bike lube
Keep your leg away from the chainring a stops.
Keep your pan legs tucked in.
Note If you ride further than you want to walk, make sure you can repair punctures.