Sedoy - you should also look at your auto registration. Your car is almost certainly registered/classified as a Sedan. SUVs and trucks pay different fees (in most states) because of the heavier weight. As others have speculated, it is no coincidence that the Model S is under 6,000 pounds. Going over that puts it in a different category for a ton of things (to include insurance). If you are self-employed and keep good records AND your utilization is for greater than 50% business, you are in good shape anyway from a tax perspective. Everyone's tax strategy is different and people have different risk tolerance, but you may want to be careful in asking questions -- especially of the IRS as you can open a much bigger can of worms than any savings you get by classifying your sedan as an SUV...