Why You Should Choose Lubri-Loy Monograde Diesel Engine Oil 40W (AEO-40) Over Southwest Oil Co. Endurance 40W
Southwest Oil Endurance 40W alternative
- Lubri-Loy
- Monograde Diesel Engine Oil 40W
- Package
- 55 gal drum
Southwest Oil Co. Endurance 40W in a 55 gallon drum has a direct counterpart on Lubri-Loy's interchange list: AEO-40, our Monograde Diesel Engine Oil, SAE 40, in a 55 gallon drum, available direct from Lubri-Loy.
We could not find a public data sheet for Southwest's Endurance 40W, so this page lists the Lubri-Loy specifications and what to confirm against your engine maker's requirements.
Southwest Oil Co. Endurance 40W vs AEO-40
| Attribute | Southwest Oil Co. Endurance 40W | AEO-40 |
|---|---|---|
| Viscosity grade | SAE 40 (40W) | SAE 40 (40W) |
| API service | See Southwest Oil Co. label or data sheet | All API service classifications up to CI-4 (Lubri-Loy catalog) |
| Military and OEM specs | No public data sheet found | MIL-L-2104F and MIL-L-2104G; suitable where Allison C-4 or Caterpillar TO-2 are specified; meets Caterpillar ECF-1 (catalog) |
| Not for | See Southwest Oil Co. label | Caterpillar TO-4, two-cycle gasoline engines, aircraft engines, EMD diesel engines (catalog) |
| Package | 55 gal drum | 55 gal drum (AEO-40); 5 gal pail is AEO-40-640 |
Southwest Oil Co. does not publish a data sheet we could locate, so no competitor values are shown. Lubri-Loy values are from the Lubri-Loy catalog.
Why choose AEO-40
Buy direct, ship free
AEO-40 is on lubriloy.com with a listed price and free US shipping. Net 30 terms are available by credit application.
Wide diesel coverage
The catalog says AEO monograde diesel oils suit nearly all two- and four-cycle diesel applications under mild to heavy duty, at any fuel sulfur level.
Drum or pail
Order 55 gallon drums for fleets and plants, or 5 gallon pails (AEO-40-640) for smaller users.
Since 1949
Lubri-Loy has supplied lubricants since 1949. We source, formulate and package through our network of US blending partners.
Check before you switch
Monograde oils are specified for particular engines and operating temperatures. Check your engine maker's required SAE grade and API category before you switch.
AEO-40 is not for Caterpillar TO-4 applications, two-cycle gasoline engines, aircraft engines or EMD diesel engines. Because we could not verify Southwest Oil Co.'s published specifications, compare your current label against the Lubri-Loy catalog sheet.
FAQ
What is the Lubri-Loy equivalent of Southwest Oil Co. Endurance 40W?
Lubri-Loy's interchange list pairs Southwest Oil Co. Endurance 40W (55 gallon drum) with Lubri-Loy AEO-40, a monograde 40W diesel engine oil in a 55 gallon drum.
What API classification does AEO-40 meet?
The Lubri-Loy catalog says AEO monograde diesel oils meet all API service classifications up to CI-4.
Is AEO-40 available in a pail?
Yes. The 5 gallon pail is AEO-40-640.
How do I buy it?
Order on lubriloy.com with free US shipping, or call (877) 582-7456.
Premium Lubricants, Without Premium Prices.
Monograde Diesel Engine Oil 40W
AEO-40 / 55 gal drum