Through the test and comparison of ethylene cracking of hydrogenated delayed coking gasoline and regular grade straight-run gasoline, it is showed that the former can be used as ethylene stock.

通过对延迟焦化汽油加氢后与普通直馏汽油的乙烯裂解试验和比较，延迟焦化汽油加氢后可以作乙烯原料。

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Mercedes recommends 91-octane fuel, but the per-gallon difference of 15 to 20 cents seems a high price to pay for a grade that is only two octane levels higher than regular.

WSJ: Is Regular Gas Good Enough?