I consider gasoline and diesel consumption separately below:
Gasoline consumption in the USA
The AER 2009 provides the following information:
Total USA Crude Oil Production 2009 (Table 5.1): 7.2 million barrels of oil per day (MB oil/d)
Total USA crude oil imports 2009 (Table 5.4): 11.7 MB oil/d
The sum of these two numbers (18.9 MB oil/d) is in pretty good agreement with the EIA’s report that the USA’s total crude and petroleum product consumption in 2009 was 18.8 MB oil/d (http://tonto.eia.doe.gov/dnav/pet/pet_cons_psup_dc_nus_mbblpd_a.htm).
We can use this number, plus knowing about what a barrel of crude oil makes (http://www.txoga.org/articles/308/1/WHAT-A-BARREL-OF-CRUDE-OIL-MAKES), to estimate the total number of Gallons of gas available per day:
18.9 MB oil/d x 19.5 G gas / 1 B of oil = 368 million gallons gas per d (MG gas/d)
Again, this in pretty good agreement with one EIA report that the USA’s total gasoline consumption in 2009 was 8.997 MB gas/d (377 MG gas/d) (http://tonto.eia.doe.gov/dnav/pet/pet_cons_psup_dc_nus_mbblpd_a.htm), and, the AER 2009 report (Table 5.13c) that motor gasoline consumption in 2009 was 8.8 MB gas/d (370 MG gas/d).
Diesel consumption in the USA
Diesel is refined from crude oil (http://www.txoga.org/articles/308/1/WHAT-A-BARREL-OF-CRUDE-OIL-MAKES) as distillate fuel oil (“dfo”) which can be used for diesel fuel, heating oil and other things. I use the term “dfo” instead of diesel to acknowledge that this fraction of a barrel of oil has multiple uses besides fueling on-road automobile transportation:
Distillate Fuel Oil: A general classification for one of the petroleum fractions produced in conventional distillation operations. It includes diesel fuels and fuel oils. Products known as No. 1, No. 2, and No. 4 diesel fuel are used in on-highway diesel engines, such as those found in cars and trucks, as well as off-highway engines, such as those in railroad locomotives and agricultural machinery. Products known as No. 1, No. 2, and No. 4 fuel oils are used primarily for space heating and electricity generation. (AER 2009, page, 392)In fact on-road diesel, off-road diesel (for farm vehicles and heating oil are chemically interchangeable. It only government proclamation and some red dye that distinguishes them:
Back to the AER 2009 (Table 5.11), which estimated that the total daily dfo supply rate is 3.63 MB dfo/d or 152 MG dfo/d, which I will take as being equal to the daily consumption rate of dfo.
So there we have the state of “happy motoring” in the USA today:
368 million MG gas/d and 152 MG dfo/d.