| Oil measure | 11 |
| Oil meas. | 9 |
| Oil man | 7 |
| Oil magnate John Paul | 21 |
| Oil magnate J. Paul ___ | 23 |
| Oil magnate J. Paul | 19 |
| Oil magnate Hess | 16 |
| Oil magnate | 11 |
| Oil low in erucic acid | 22 |
| Oil letters | 11 |
| Oil leaks | 9 |
| Oil leakage | 11 |
| Oil land | 8 |
| Oil lamp part | 13 |
| Oil lamp feature | 16 |
| Oil job | 7 |
| Oil jar | 7 |
| Oil island | 10 |
| Oil industry tie? | 17 |
| Oil industry prefix | 19 |
| Oil industry honcho | 19 |
| Oil in old Rome | 15 |
| Oil in Earl Grey tea is announced? | 34 |
| Oil in a can | 12 |
| Oil holders | 11 |
| Oil holder? | 11 |
| Oil holder, perhaps | 19 |
| Oil holder, maybe | 17 |
| Oil holder | 10 |
| Oil grp. | 8 |
| Oil group | 9 |
| Oil gp. | 7 |
| Oil giant with HQ in Vienna | 27 |
| Oil giant that's part of the Tesoro Corporation | 51 |
| Oil giant of yore | 17 |
| Oil giant based in Memphis | 26 |
| Oil giant Amerada __ | 20 |
| Oil giant acquired by BP | 24 |
| Oil giant | 9 |
| Oil from petals | 15 |
| Oil from orange trees | 21 |
| Oil from orange flowers | 23 |
| Oil from orange blossoms | 24 |
| Oil from flower petals | 22 |
| Oil from flax | 13 |
| Oil for the lamps of Roma | 25 |
| Oil flask | 9 |
| Oil fire fighter Red ___ | 24 |
| Oil filter brand | 16 |
| Oil filter accumulation | 23 |
| Oil field? | 10 |
| Oil field workers | 17 |
| Oil field strike | 16 |
| Oil field sights | 16 |
| Oil field sight | 15 |
| Oil field investigation | 23 |
| Oil family of TV | 16 |
| Oil family name of the '80s | 31 |
| Oil facility | 12 |
| Oil extractors | 14 |
| Oil exporters | 13 |
| Oil exporter | 12 |
| Oil exportation grp. | 20 |
| Oil encircler | 13 |
| Oil emirate | 11 |
| Oil drum | 8 |
| Oil drilling equipment | 22 |
| Oil drilling device | 19 |
| Oil driller's setup | 23 |
| Oil directly from a well | 24 |
| Oil deposit problem | 19 |
| Oil country: Var. | 17 |
| Oil country | 11 |
| Oil corporation based in Irving, Texas | 38 |
| Oil corp. based in La Palma, Calif. | 35 |
| Oil conveyor | 12 |
| Oil containers ["Get down!"] | 38 |
| Oil containers | 14 |
| Oil container #4 | 16 |
| Oil container #3 | 16 |
| Oil container #2 | 16 |
| Oil container #1 | 16 |
| Oil container | 13 |
| Oil conduit | 11 |
| Oil company, in Wall Street lingo | 33 |
| Oil company's penchant for employee transfers? | 50 |
| Oil company with annual toy trucks | 34 |
| Oil company with a toy truck line | 33 |
| Oil company with a sign visible from Fenway Park | 48 |
| Oil company with a "trimark" logo | 43 |
| Oil company that merged with BP | 31 |
| Oil company structure | 21 |
| Oil company sold to Texaco in 1984 | 34 |
| Oil company of old | 18 |
| Oil company mercenary? | 22 |
| Oil company machine | 19 |
| Oil company in a 1999 merger | 28 |
| Oil company headquartered in New York City | 42 |
| Oil company founder Halliburton | 31 |
| Oil company founded by George H.W. Bush | 39 |