I think I can get a better deduction after reading all of your posts. Currently I get paid mileage to/from home/worksite, and get an additional $8/day for personal vehicle use to go back and forth to the plant from motel everyday worked. With the price of fuel and the feds raising the mileage reimbursement, I believe I can get more of a deduction if I keep track of mileage everyday. This really depends on how far away the plant is from the motel. I believe it would be the same as Beercourt stated earlier, add totals up and subtract what the employer has paid to get the allowable deduction.