Crudely (haha) crunching some numbers, if we consider the oil spilled in the US in 2011 (incl. Deepwater Horizon) of 4.95e6 bbl compared to the total oil consumption in 2015 of 7.09e9 bbl, the oil spilled is less than 0.07% of the oil consumed. This, mind you, is considering a massive outlier year for spilled oil. In a more typical year it's an order of magnitude less.
Not to minimize the damage from spilled oil or suggest that it's no problem, but let's keep "spill a lot" in perspective.
4.95e6 bbl ( 41 L/bbl) = 203 million liters. Your only reference for scale can't be just net product, absolute numbers seem to more accurately approximate the scale of damage.
Do your numbers include pipeline and other small but continuous sources of loss?
That includes spills from vessels, facilities, pipelines, and other unknown sources. Regardless, the spill due to Deepwater Horizon was so massive compared to more typical years.
Also, it's 786,987,110 liters (there are ~159 liters in an oil barrel).
Not to minimize the damage from spilled oil or suggest that it's no problem, but let's keep "spill a lot" in perspective.