Most, if not all, experts disagree with your figure.
Little things like population explosion, worldwide modernization, China becoming an automobile manufacturer...balloon the actual number of vehicles far past the amount of oil on Earth to run them.
Gas is on the way out as a transportation fuel, and probably completely in the next 20 years.
We use 25% of the oil and produce 33% of the world's wealth. It's a pretty good deal for everyone if you think about it.
There's population explosion in some places, but not in others. Europe is getting older in a big way. So is the USA.
This chart is for only the top 12 oil producing countries or those with the largest oil reserves. There are many more. The figures do not include ANWR, offshore, oil shale, and other sources in the USA. The 65 year number contradicts your 20 year figure. It truly is 150+ years if you count all the rest.
<table class="wikitable"><caption>Summary of Reserve Data as of 2007</caption> <tbody><tr> <th rowspan="2">Country</th> <th colspan="2">Reserves <sup>1</sup></th> <th colspan="2">Production <sup>2</sup></th> <th>Reserve life <sup>3</sup></th> </tr> <tr> <th>10<sup>9</sup> bbl</th> <th>10<sup>9</sup> m<sup>3</sup></th> <th>10<sup>6</sup> bbl/d</th> <th>10<sup>3</sup> m<sup>3</sup>/d</th> <th>years</th> </tr> <tr> <td>
Saudi Arabia</td> <td align="right">260</td> <td align="right">41</td> <td align="right">8.8</td> <td align="right">1,400</td> <td align="right">81</td> </tr> <tr> <td>
Canada</td> <td align="right">179</td> <td align="right">28.5</td> <td align="right">2.7</td> <td align="right">430</td> <td align="right">182</td> </tr> <tr> <td>
Iran</td> <td align="right">136</td> <td align="right">21.6</td> <td align="right">3.9</td> <td align="right">620</td> <td align="right">96</td> </tr> <tr> <td>
Iraq</td> <td align="right">115</td> <td align="right">18.3</td> <td align="right">3.7</td> <td align="right">590</td> <td align="right">85</td> </tr> <tr> <td>
Kuwait</td> <td align="right">99</td> <td align="right">15.7</td> <td align="right">2.5</td> <td align="right">400</td> <td align="right">108</td> </tr> <tr> <td>
United Arab Emirates</td> <td align="right">97</td> <td align="right">15.4</td> <td align="right">2.5</td> <td align="right">400</td> <td align="right">106</td> </tr> <tr> <td>
Venezuela</td> <td align="right">80</td> <td align="right">13</td> <td align="right">2.4</td> <td align="right">380</td> <td align="right">91</td> </tr> <tr> <td>
Russia</td> <td align="right">60</td> <td align="right">9.5</td> <td align="right">9.5</td> <td align="right">1,510</td> <td align="right">17</td> </tr> <tr> <td>
Libya</td> <td align="right">41.5</td> <td align="right">6.60</td> <td align="right">1.8</td> <td align="right">290</td> <td align="right">63</td> </tr> <tr> <td>
Nigeria</td> <td align="right">36.2</td> <td align="right">5.76</td> <td align="right">2.3</td> <td align="right">370</td> <td align="right">43</td> </tr> <tr> <td>
United States</td> <td align="right">21</td> <td align="right">3.3</td> <td align="right">4.9</td> <td align="right">780</td> <td align="right">11</td> </tr> <tr> <td>
Mexico</td> <td align="right">12</td> <td align="right">1.9</td> <td align="right">3.2</td> <td align="right">510</td> <td align="right">10</td> </tr> <tr> <td>
Total of top twelve reserves</td> <td align="right">1,137</td> <td align="right">180.8</td> <td align="right">48.2</td> <td align="right">7,660</td> <td align="right">65</td> </tr> <tr> <td colspan="6"><small>
Notes:</small> <dl><dd><small>1 Claimed or estimated reserves in billions (10<sup>9</sup>) of barrels (converted to billions of cubic metres). (Source: Oil & Gas Journal, January, 2007)</small></dd><dd><small>2 Production rate in millions (10<sup>6</sup>) of barrels per day (converted to thousands of cubic metres per day) (Source: US Energy Information Authority, September, 2007)<sup id="cite_ref-14" class="reference">
[15]</sup></small></dd><dd><small>3 Reserve to Production ratio (in years), calculated as reserves / annual production. (from above)</small></dd></dl></td></tr></tbody></table>There's this, too:
http://www.runet.edu/~wkovarik/oil/
To begin with, one of the most revealing speeches about world oil reserves went unremarked in 2006. The head of the world's largest oil company, Saudi Aramco, said:
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“We are looking at more than four and a half trillion barrels of potentially recoverable oil. That number translates into 140 years of oil at current rates of consumption, or to put it anther way, the world has only consumed about 18 percent of its conventional oil potential. [/FONT]
[FONT=Arial, Helvetica, sans-serif]That fact alone should discredit the argument that peak oil is imminent and put our minds at ease concerning future petrol supplies.” [/FONT]
[FONT=Arial, Helvetica, sans-serif]What does it mean? Why does his view of world reserves conflict so dramatically with the oil industry's view? [/FONT]
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Probably most important for world oil policy, the Middle East does not necessarily have two thirds of all world oil reserves, as has long been claimed by the oil companies and the US Dept. of Energy. It only has two thirds of "proven" oil reserves which are far smaller than the potential reserves Jum'ah describes.[/FONT][FONT=Arial, Helvetica, sans-serif]
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The "traditional" view (British Petroleum). [/FONT]
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Here is the conventional view of proven world oil reserves, 2002, British Petroleum. [/FONT]</td> <td bordercolor="#000000" bgcolor="#ffffff" height="66" width="400">[FONT=Arial, Helvetica, sans-serif]
Here is a more geologically accurate picture of world oil reserves that adds US Geological Survey figures for recoverable and unconventional oil reserves. [/FONT]</td></tr></tbody></table>