best lubricant oil for noisy internal fans in iMac's & MacBook's
I have few old 2010/2011 iMac's (21.5" & 27") with noisy internal fans. I was just wondering what is the best recommended oil to use to lubricate the fans after they have been cleaned from dust.
I have seen some people using Lithium Grease or sewing machine oil to lubricate the internals of the fan to reduce the noise.
Would you say that this help's lubricate noisy fans and if so which one would you recommend?
Also, how much would you recommend to apply?