Mechanics how long will this take.?

oil change and replacement of filter will take 45 minutes... tuning up depending upon the condition can take up anytime from 10 mins to 2 hrs depending upon a lot of things like whether u choose to get wheel alignment done etc.... the belt will take 5 minutes... if u r getting d air conditioner fixed it should not take more than 30 minutes but if the compressor is gone it might take a day also... the air filter can be replaced again in 5 minutes... so mostly it should not take more than 3 hrs for all these...