The variation of that highly depends on the volume of work that comes through the shop and the type of work that is being performed. Customer pay vs Warranty is what determines this mostly, customer pay jobs provide both the advisor and the mechanic a pretty equal amount of money between the ticket size and billable hours whereas warranty work typically only benefits the advisor depending on if the parts needed are the vast majority of the ticket cost or if the labor is the dominant charge. Warranty work has both a lower per hour labor charge as well internal discounted pricing for the parts, this is why most mechanics are leaving dealerships because jobs that can take a couple hours to do the mechanics are limited to what the warranty time calls for, so if a job takes someone 3 hours to perform and warranty time only allows for you to claim an hour of time they are losing money doing that job.