| Midest export | 13 |
| Mideast mainstay | 16 |
| Mideast industry | 16 |
| Mideast "gold" | 24 |
| Middle Eastern asset | 20 |
| Medium for Van Dyck or van Gogh | 31 |
| Medium for Matisse | 18 |
| Masseuse's bottleful | 24 |
| Masseur's need | 18 |
| Many a MoMA piece | 17 |
| Many a fine artwork | 19 |
| Manet's "The Luncheon on the Grass," e.g. | 55 |
| Manet, maybe | 12 |
| Make slick | 10 |
| Maintain, as some tools | 23 |
| Lucigen fuel | 12 |
| Lubricating agent | 17 |
| Lube (up) | 9 |
| Lorenzo's nostrum | 21 |
| Loosen up, maybe | 16 |
| Little squirt, maybe | 20 |
| Liquid gold | 11 |
| Linseed yield | 13 |
| Linseed product | 15 |
| Linseed ___ | 11 |
| Light on a dashboard | 20 |
| Libyan export | 13 |
| Kuwait's great resource | 27 |
| Kuwait asset | 12 |
| Kneading need | 13 |
| Kirkuk resource | 15 |
| Kind of palm or pan | 19 |
| Kind of paint or well | 21 |
| Kind of leak | 12 |
| Kind of filter | 14 |
| Kind of field or man | 20 |
| Kind of cloth or can | 20 |
| Kind of can or cloth | 20 |
| Key export through the Strait of Hormuz | 39 |
| Joint relief for the Tin Man | 28 |
| Joint application | 17 |
| Jiffy Lube supply | 17 |
| Jett Rink's find | 20 |
| Jed's find | 14 |
| Jed Clampett's wealth source | 32 |
| Jed Clampett's find | 23 |
| Jed Clampett's bubblin' crude | 37 |
| J.R.'s business | 19 |
| J.R. Ewing's concern | 24 |
| J. R.'s concern | 19 |
| Its spill may kill one with a bill | 34 |
| It's well-supplied | 22 |
| It's well-regulated | 23 |
| It's struck in Texas | 24 |
| It's regularly changed in automobiles | 41 |
| It's often changed at garages | 33 |
| It should be changed regularly | 30 |
| It might be crude | 17 |
| It might be changed quarterly | 29 |
| It may be struck in a field | 27 |
| It may be made from olives or corn | 34 |
| It may be crude or refined | 26 |
| It made Jed a millionaire | 25 |
| It gets piped in | 16 |
| It gets checked with a stick | 28 |
| It floats on water | 18 |
| It can foul spark plugs | 23 |
| It can be refined | 17 |
| It can be hydrogenated | 22 |
| Iraqi export | 12 |
| Iraq resource | 13 |
| Industrial staple | 17 |
| Indicator on a dashboard | 24 |
| Incubus "___ and Water" | 33 |
| High-priced commodity in 2008 | 29 |
| Heating alternative | 19 |
| Halliburton commodity | 21 |
| Gusher's gush | 17 |
| Gulf of Mexico product | 22 |
| Grapeseed or sesame | 19 |
| Grape seed product | 18 |
| Gas-station item | 16 |
| Futures contract | 16 |
| Fuel found in all three theme entries | 37 |
| Fuel associated with midnight | 29 |
| Fry cook's supply | 21 |
| Friction decreaser | 18 |
| Fondue pot fill | 15 |
| Fluid on a dipstick | 19 |
| Fluid for a car | 15 |
| Flattering talk | 15 |
| Flattering speech | 17 |
| Fix the squeak | 14 |
| Essential or crude substance | 28 |
| Energy source in drums | 22 |
| Ebon flow | 9 |
| Driveway stain | 14 |
| Drilling target | 15 |
| Driller's quest, often | 26 |
| Driller's goal | 18 |