# Lubri-Loy GOS-150-640 vs Mobil SHC 629: Why Choose Lubri-Loy for ISO 150 Synthetic Gear Oil Date: 2026-11-14 Canonical HTML URL: https://lubriloy.com/blog/why-choose-lubri-loy-gos-150-640-over-mobil-shc-629 ISO 150 SYNTHETIC GEAR OILGOS-150-640 # Lubri-Loy GOS-150-640 vs Mobil SHC 629: Why Choose Lubri-Loy for ISO 150 Synthetic Gear Oil Mobil SHC 629 alternative - **Lubri-Loy:** Industrial EP Synthetic Gear Oil ISO 150 - **Package:** 5 gal pail [Buy GOS-150-640 direct](https://lubriloy.com/products/gos-150-640)[Request a quote](https://lubriloy.com/support?topic=quote&product=GOS-150-640) If you buy Mobil SHC 629 in a 5 gallon pail, there is a straight swap on Lubri-Loy's interchange list: GOS-150-640, our Industrial EP Synthetic Gear Oil in ISO viscosity grade 150. It is a PAO (polyalphaolefin) synthetic built for enclosed gear drives that call for an AGMA EP or AGMA S gear oil, and you can order it direct from Lubri-Loy. This page lays out what the two oils have in common, where the published numbers differ, and what to check before you switch. We only use figures from Lubri-Loy's own catalog and from the manufacturer's public data, and we mark anything we could not verify. ## Quick answer Lubri-Loy's interchange list pairs Mobil SHC 629 (5 gal pail) with Lubri-Loy GOS-150-640 (5 gal pail): both are ISO VG 150 synthetic gear oils for enclosed gear drives. 01Side by side ## Mobil SHC 629 vs GOS-150-640 | Attribute | Mobil SHC 629 | GOS-150-640 | | Product type | Synthetic gear and bearing oil | Industrial EP synthetic gear oil (PAO) | | ISO viscosity grade | ISO VG 150 | ISO VG 150 | | Viscosity @ 40°C, cSt | 150 | 156.75 | | Viscosity @ 100°C, cSt | 21.1 | 19.3 | | Viscosity index | 166 | 141 | | Pour point | -48°C | -40°C (-40°F) | | Flash point | 220°C | See data sheet | | OEM approvals | Mobil lists a Flender (Siemens) approval | None listed in the Lubri-Loy catalog | | Package on interchange list | 5 gal pail | 5 gal pail (GOS-150-640) | Mobil values are from Mobil's published product page for the SHC 600 Series. 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 GOS-150-640 - 01 ### Buy direct, ship free GOS-150-640 is listed on lubriloy.com with a price, and US orders ship free. Call (877) 582-7456 to talk through a standing order. - 02 ### Built for enclosed gear drives Lubri-Loy's catalog describes the GOS series for enclosed spur, bevel, herringbone, helical and chain-drive gearboxes and other applications that require an AGMA EP or AGMA S gear oil, with protection in extreme hot and cold temperatures and heavy loads. - 03 ### Pail or drum, same line Run 5 gallon pails for small gearboxes and move to 55 gallon drums (GOS-150) for larger sumps without changing the product family. - 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 says SHC 629 is approved by Siemens AG for use in Flender gearboxes. If your gearbox maker requires a named approval, or your warranty depends on one, confirm what the OEM specifies before you switch. Mobil's published viscosity index (166) and pour point (-48°C) are better than the Lubri-Loy catalog values shown above, so compare against the operating temperatures in your application. If you are changing oils in a running gearbox, follow your OEM's drain and flush guidance, and do not mix synthetic gear oils from different makers in one sump without confirming compatibility. 04Common questions ## FAQ ### What is the Lubri-Loy equivalent of Mobil SHC 629? + On Lubri-Loy's product interchange list, Mobil SHC 629 in a 5 gallon pail is paired with Lubri-Loy GOS-150-640, an ISO 150 industrial EP synthetic gear oil in a 5 gallon pail. They are different products from different companies, so check the data sheets and your OEM's requirements. ### Is GOS-150-640 a PAO synthetic? + Yes. The Lubri-Loy catalog spec page lists the GOS series as PAO (polyalphaolefin) base oil with an EP additive package. ### Can I order GOS-150-640 online? + Yes. It is on lubriloy.com with direct purchase and free US shipping. Call (877) 582-7456 for drums or standing orders. ### Does GOS-150-640 carry a Flender approval? + The Lubri-Loy catalog does not list OEM approvals for this product. If your gearbox maker requires one, confirm with the OEM or ask Lubri-Loy for the current data sheet. Premium Lubricants, Without Premium Prices. ## Industrial EP Synthetic Gear Oil ISO 150 GOS-150-640 / 5 gal pail [Buy GOS-150-640 direct](https://lubriloy.com/products/gos-150-640)[Request a quote](https://lubriloy.com/support?topic=quote&product=GOS-150-640) ## Sources - [Mobil SHC 629 product page (ExxonMobil) (opens in a new tab)](https://www.mobil.com/en/lubricants/for-businesses/industrial/lubricants/products/products/mobil-shc-629) Mobil and SHC 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.