Fan noise on startup for at least 5 minutes
Every day when I'm starting working on my laptop, fan (I think it's left fan) is noising for at least 5 minutes. After that it's working quietly.
I've recorded the noise, you can listen it here https://soundcloud.com/pavlentij/macbook...
Should I replace the fan or it can be fixed with oil? If it's not fixable then how I can discover which one fan is noising?