Why You Should Choose Lubri-Loy GO-320-640 Over Mobilgear 600 XP 320
Mobilgear 600 XP 320 alternative
- Lubri-Loy
- Industrial EP Gear Oil, Mineral, ISO 320
- Package
- 5 gal pail

Mobilgear 600 XP 320 is a common spec on enclosed industrial gearboxes. If you buy it in 5 gallon pails and want a direct-from-supplier alternative, Lubri-Loy's interchange list points to GO-320-640: our Industrial EP Gear Oil, mineral, ISO viscosity grade 320.
Below is a plain comparison using Lubri-Loy catalog values and Mobil's published properties, plus the things you should confirm before you change oils.
Mobilgear 600 XP 320 vs GO-320-640
| Attribute | Mobilgear 600 XP 320 | GO-320-640 |
|---|---|---|
| Product type | Extra-high-performance mineral industrial gear oil (Mobilgear 600 XP series) | Industrial EP gear oil, mineral |
| ISO viscosity grade | ISO VG 320 | ISO VG 320 |
| Viscosity @ 40°C, cSt | 320 | 320 |
| Viscosity @ 100°C, cSt | 24.1 | 25 |
| Viscosity index | 97 | 100 |
| Pour point | -24°C | See data sheet |
| OEM approvals | Mobil lists OEM approvals (such as Flender and Renk) on some grades; see its data sheet for the 320 grade | None listed in the Lubri-Loy catalog |
| Package on interchange list | 5 gal pail | 5 gal pail (GO-320-640) |
Mobil values are Mobil's published typical properties. Lubri-Loy values are typical properties printed in the Lubri-Loy catalog spec pages.
Why choose GO-320-640
Buy direct, ship free
GO-320-640 is on lubriloy.com with a listed price, and US orders ship free. Net 30 terms are available by credit application.
Made for heavily loaded gear drives
The Lubri-Loy catalog describes the GO line as having excellent oxidation and thermal stability, non-corrosive to steel, copper, bronze, Babbitt and cadmium-nickel, with good foam resistance and water separation.
Pail, drum or tote
Start with a 5 gallon pail and move up to a 55 gallon drum (GO-320) or a 275 gallon tote (quote) as your volume grows.
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
Mobil lists OEM approvals (for example Flender and Renk) on some grades of the 600 XP series. If your gearbox maker requires a named approval, confirm what the OEM specifies for the 320 grade before you switch.
Mobil highlights micropitting and FE8 bearing-wear protection for the 600 XP series. The Lubri-Loy catalog does not print those tests for GO-320, so if your gearbox is micropitting-sensitive, ask the OEM what it requires.
FAQ
What is the Lubri-Loy equivalent of Mobilgear 600 XP 320?
Lubri-Loy's product interchange list pairs Mobilgear 600 XP 320 in a 5 gallon pail with Lubri-Loy GO-320-640, an ISO 320 mineral EP gear oil in a 5 gallon pail. Different companies make them, so compare data sheets and OEM requirements.
Is GO-320-640 a mineral or synthetic oil?
GO-320-640 is a mineral-oil industrial EP gear oil. Lubri-Loy's synthetic line (GOS) is a separate family.
Can I buy it in a drum?
Yes. The 55 gallon drum is catalog number GO-320. A 275 gallon tote is available by quote.
How do I order GO-320-640?
Order direct on lubriloy.com with free US shipping, or call (877) 582-7456.
Premium Lubricants, Without Premium Prices.
Industrial EP Gear Oil, Mineral, ISO 320
GO-320-640 / 5 gal pail