# Why You Should Choose Lubri-Loy GO-320-640 Over Mobilgear 600 XP 320 Date: 2026-11-14 Canonical HTML URL: https://lubriloy.com/blog/why-choose-lubri-loy-go-320-640-over-mobilgear-600-xp-320 ISO 320 EP GEAR OILGO-320-640 # 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 [Buy GO-320-640 direct](https://lubriloy.com/products/go-320-640)[Request a quote](https://lubriloy.com/support?topic=quote&product=GO-320-640) 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. ## Quick answer Lubri-Loy's interchange list pairs Mobilgear 600 XP 320 (5 gal pail) with Lubri-Loy GO-320-640 (5 gal pail): both are ISO VG 320 gear oils for enclosed gear drives, and GO-320 is a mineral-oil EP gear oil. 01Side by side ## 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. Scroll the table sideways to see every column. 02The case for switching ## Why choose GO-320-640 - 01 ### 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. - 02 ### 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. - 03 ### 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. - 04 ### Since 1949 Lubri-Loy has supplied lubricants since 1949. We source, formulate and package through our network of US blending partners. 03Before the changeover ## 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. 04Common questions ## 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 [Buy GO-320-640 direct](https://lubriloy.com/products/go-320-640)[Request a quote](https://lubriloy.com/support?topic=quote&product=GO-320-640) ## Sources - [Mobilgear 600 XP 320 product page (ExxonMobil) (opens in a new tab)](https://www.mobil.com/en/lubricants/for-businesses/industrial/lubricants/products/products/mobilgear-600-xp-320) Mobil and Mobilgear are trademarks of ExxonMobil Corporation or its subsidiaries. Product names are trademarks of their respective owners and are used for identification only. Lubri-Loy is not affiliated with or endorsed by them. Competitor figures are from the sources linked above; Lubri-Loy figures are typical values from the Lubri-Loy catalog. Always check the current data sheet before changing products. Premium Lubricants, Without Premium Prices.