I'm touching 7,000 miles and chain adjustment is still on the original settings. (Third back tire, so the back wheel has been out two times, but the adjusters are still where they were when the bike was new)
I don't believe in lubricating a chain with anything which will attract dust as grinding past is exactly that. Carbide and lubricant. I cleaned my chain the day the bike came off the showroom floor to get the grease off, for the above reason. Have used Dupont a few times, but not much. Still not sure if I believe in lubricating a sealed o-ring chain?
IMHO it is impossible to clean an oily chain impregnated with dust (grinding paste) without removing the chain and soaking it thoroughly, which is not really an option. This is not an option on the Busa and trying to remove impregnated dust with the chain on the bike only makes things worse.
Again IMHO all the Dupont does, is keep the o-rings from drying out, so the pins and bushes remain sealed without ingress of dirt. It also keeps the chain clean, but has little to no effect of lubricating underneath the rollers or between rollers and sprocket.
Every time I need new tags in NC, DMV needs inspection. Every time the mechanic tells me my chain is dry, if he should lube it. I always so no and ask if he is not impressed with how clean the chain is :-)