NEW YORK (CNNMoney.com) -- Oil prices dropped Friday after a government report said almost all of the jobs added last month were temporary Census workers, and the euro fell to a 4-year low.
What prices are doing: Crude oil for July delivery fell $3.10, or more than 4%, to settle at $71.51 a barrel.
Oil prices rose more than 2% Thursday after a report showed supplies fell more than expected.
The national average price for a gallon of regular unleaded gasoline increased to $2.726, up from the previous day's price of $2.716, according to motorist group AAA. It was the first increase after 27 straight days of declines.
What's moving the market: The widely watched U.S. jobs report, released at 8:30 a.m. ET, was disappointing because gains were due mostly to a surge in Census hiring.
Payrolls rose by 431,000 in May, the Labor Department said, but 411,000 of those were temporary Census workers. That was the largest monthly increase in more than 10 years. Economists expected an overall gain of 500,000.
But private employment increased just 41,000, after a 218,000 increase in April. Government payrolls other than Census declined by 21,000 jobs in May.
The tepid gains show U.S. employers are still nervous about hiring. America is the world's largest consumer of oil.
The jobs report also sent other markets lower, which placed pressure on crude. U.S. stocks tumbled, with the Dow Jones industrial average (INDU) losing nore than 399 points. Oil investors tend to look to stock markets as an indicator of future global fuel demand.
The safe-haven dollar soared to a four-year high versus the euro. Oil is priced in U.S. dollars around the world, so a firmer dollar makes crude more expensive for foreign investors and therefore dampens demand for the commodity. 
| Overnight Avg Rate | Latest | Change | Last Week |
|---|---|---|---|
| 30 yr fixed | 3.80% | 3.88% | |
| 15 yr fixed | 3.20% | 3.23% | |
| 5/1 ARM | 3.84% | 3.88% | |
| 30 yr refi | 3.82% | 3.93% | |
| 15 yr refi | 3.20% | 3.23% |
Today's featured rates:
| Index | Last | Change | % Change |
|---|---|---|---|
| Dow | 32,627.97 | -234.33 | -0.71% |
| Nasdaq | 13,215.24 | 99.07 | 0.76% |
| S&P 500 | 3,913.10 | -2.36 | -0.06% |
| Treasuries | 1.73 | 0.00 | 0.12% |
| Company | Price | Change | % Change |
|---|---|---|---|
| Ford Motor Co | 8.29 | 0.05 | 0.61% |
| Advanced Micro Devic... | 54.59 | 0.70 | 1.30% |
| Cisco Systems Inc | 47.49 | -2.44 | -4.89% |
| General Electric Co | 13.00 | -0.16 | -1.22% |
| Kraft Heinz Co | 27.84 | -2.20 | -7.32% |
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