Finally! I'm glad to discover that I'm not the only one using motor oil on my chains! One fella tells me I'm crazy for doing that. I've been getting over 5000 miles per chain, and never was able to get the "go/no go" Parks gauge into a chain. Never had one wear that much before I dust bin it. This fella who says I'm crazy for doing that, carefully cleans and lubes his chain after most rides with with some special chain lube, then dustbins every chain at 1000 miles!!! I asked him why, if he's going to toss it at 1000 miles, why bother to clean and lube it at all?
Longevity of a chain is, or appears to be wildy different person to person.
I rarely ever got more than 1200 miles out of a chain, whatever lubrication regime I used ( I used to record when a chain was fitted, so I knew what mileage was achieved). The results were always the same, whatever lube, whatever chain was fitted, Shimano, KMC, Sram etc.
Yet plenty get acres more mileage from a chain...why...who knows, riding style, hills etc etc.
When I used to commute, I'd have the chain off weekly as a minimum, blast off the crud with an airline, dip in a bowl of engine oil (new), hang it on a nail to drip off into same bowl until excess had drained, wipe, fit to bike and wipe again.
Sounds a faff, but you only had hands on the chain for maybe 10 minutes for the whole operation, very quick and easy...especially as I used to do it in works time, in the workshop.
None of it made any difference in the end, my chain still only lasted circa 1200 miles, so revert back to wipe, oil, wipe and ride.
The fella above who cleaned and lubed his chain and still threw it away at 1000 miles isn't far off what I achieve anyway.
Personally I'm using chainsaw oil now, trouble is I will have no idea if it makes a chain last longer, I started halfway through my current chains life.