I do not like shiny and dry rollers and sprocket teeth. Always used to have some oil spray with me on long trips.
Not sure it made a difference in chain and sprocket longevity but it made me feel better

Many moons ago before O and X ring chains entered my life I had this chain ritual every month.
I had a big coffee tin (tins were stronger back then) filled up 3/4 with thick gear oil. Into this tin my chain will go and then
this lot went into the oven and heated up. When hot removed and left to cool overnight.
The theory was any air and moisture will expand when hot and as this lot cools the oil will be sucked into the pins and rollers.
Did it work ? Dont know but it made me feel better and my bikes loved the attention
