How much oil is required for manufacturing, maintaining and driving a vehicle?

Well, this question is definitely hard to answer. There's so much that goes behind building a car in terms of energy expenditure, that I consider impossible to get an accurate number. But we may be able to get an estimate. Here's a great question: which requires more energy - manufacturing a car or driving and maintaining it? In the case of electric vehicles no oil is necessary to power the car and the energy can come from 100% renewable sources as mentioned in my previous post. EVs require very little maintenance in comparison to ICEs; something I'll get into details later.

According to Colin Campbell, it takes between 17 and 50 barrels of oil to manufacture a single car. Of course no auto plant is built for the purpose of building a single car (not typically anyway), so this information is broken down and the impact on the environment is always from manufacturing large numbers of vehicles and not just one. But let's use these numbers as a basis until we get something more accurate. What is the amount of oil that it takes to drive a car? This last question is a little easier to answer, though it'll require some research. I'll probably use the Toyota Camry for this measurement since it's the "best-selling passenger car in America". I'll use the average miles-per-gallon (MPG) of the Toyota Camry to calculate how much gasoline it uses in its lifetime. For the lifetime I'll probably use 300,000 miles since I believe that's how long those engines last on average. Then the last step will be to convert the energy in a gallon of gasoline to the energy in a barrel of oil. This should give us an estimate. If anyone has any ideas or pointers, please let me know. In the meantime I'll be working on this. Please check back soon!
- Ricardo Parker

Source: http://www.energy.ca.gov/gasoline/whats_in_barrel_oil.html