Old school here.

I use chain oil (designed for chain saw bars) mixed 1:3 or so with 30 weight, in a squeeze bottle with a small tip, so that I can apply it precisely. Not sure what brand, but a quart lasts three years or so. The chain bar oil has a stringy property so that it doesn't fly off. Spend three times as much time wiping it off with a rag as you do applying it, then there is very little there to attract dirt. I wipe the chain after every 150 km or so, relube, and wipe it again.

I got 5000 km on my Ultegra chain, and 4500 km on my tandem chain, despite the double load, with this method. We just replaced my wife's Dura Ace chain at 2500 km, which was early, but that was because of the cost of the replacement chain rings (which we want to avoid needing).

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue