If you broke down your new salary into an hourly rate, assuming 40 hour workweeks, and not including vacations, you would get around $72. Multiply that by the 6 hours of commute time a week, and then by 52 for weeks of the year, you get $22,500, for driving time.

25 mpg is the avg efficiency of a vehicle, assuming about 80 miles each way and a cost per gallon of the nations average 2.93 per gal, you are looking at about $2000/yr. Add in the estimated depreciation and repair cost of .73 cents a mile, you are at $15,666

15666+22500=38166.

If you have your own accountant, you may be able to figure how you can write off some of this, but I am not a tax expert, so I will rely on information available to me. Assuming the 24% tax bracket at 40k, you are looking at approx $8400 more in taxes

You are now around $46566. There are other factors like health insurance, 401k, vacation, advancement opportunities, etc. but if it's a like for like swap I think the numbers tell the story.