But only briefly - I have to blow hard into the air vent to clean out the cooling fans before they seize.
My X61 decided to get the CPU fan to seize while on holiday for a week. A trip to one of those local Pakistani-run WeSellEverythingIncludingKitchenSinks store somewhere in London for a set of jeweller's screwdrivers, a tin of lighter fluid and a flacon of universal oil solved that.
Remove keyboard, peel sticker off fan hub, mix a bit of lube with lighter fluid (otherwise it's too viscous for that bearing) and put that in the fan hub.
Done. Kept going for several weeks, long enough to get home, order a new fan and wait for it to arrive.