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AMSOIL Grease
Engineered for heavy equipment, including dozers, tractors, balers, scrapers, graders, combines, loaders, forklifts, backhoes, harvesters, feller bunchers, and excavator shovels.
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| Product code | Package size | Unit of measure |
|---|---|---|
| GPOR1CR-EA | 15 oz. Cartridge | Each |
| GPOR1CR-PK | 15 oz. Cartridge - Packs of 40 | Packs of 40 |
| GPOR1CR-CA | Case of 10 15 oz. Cartridges | Case of 10 |
| GPOR199-EA | 120 lb. Keg | 120 lb. Keg |
| GPOR135-EA | 35 lb. Pail | 35 lb. Pail |
AMSOIL Synthetic Polymeric Off-Road Grease NLGI #1 (GPOR1) is a heavy-duty, calcium-sulfonate-complex grease engineered for pin, bushing, and pivot lubrication on construction, mining, logging, agricultural, and landscaping equipment. The softer NLGI #1 consistency pumps more readily through long grease hose runs in cold weather, while a proprietary synthetic polymeric system gives the grease the adhesion and impact resistance needed to stay on heavily loaded components between service intervals.
Off-road equipment forces every pound of working load through the same pivot points, so grease has to absorb repetitive pounding without being squeezed out. The synthetic polymeric system in GPOR1 provides high adhesion to metal and cohesion within the grease film, which keeps lubricant in the wear zone under shock loading. A Four-Ball Weld Point of 620+ kgf in ASTM D-2596 and a Timken OK Load of 65+ lbs in ASTM D-2509 document the load-carrying capacity.
Grease intended for severe pin and bushing service is usually tacky and tough to move through long supply lines in winter. The NLGI #1 grade was developed for that scenario. GPOR1 pumps best in temperatures above 0 F, compared with the NLGI #2 version (GPOR2), which is rated to pump best in temperatures above 40 F. A heavy follower plate may be required when pumping the grease from larger package sizes such as the 120-lb. keg. Because the grease is engineered to stay in place over long service intervals, automatic or centralized lubrication systems are only suitable when the system is specifically designed to handle a tackier grease.
The formulation is heavily fortified with molybdenum disulfide, which forms a sacrificial film on metal during boundary lubrication and absorbs impact when an oil film is momentarily squeezed out. The 5 percent moly content matches the level Caterpillar specifies for pin and bushing applications on dozers, loaders, and similar machines. The Four-Ball Wear Test scar measures less than 0.45 mm in ASTM D-2266, supporting protection of heavily loaded contact areas through long re-grease cycles.
The calcium-sulfonate complex thickener carries inherent extreme-pressure and corrosion-inhibiting properties without relying solely on additive package response. The Dropping Point reaches 321 C (610 F) in ASTM D-2265, giving margin for hot bearing housings and pivot points near exhaust components on operating equipment.
Wheel loaders moving aggregate, log skidders in wet ground, and graders pushing through standing water all expose grease points to constant water intrusion. GPOR1 produces only 1 percent loss in the ASTM D-1264 Water Washout test at 100 F, holding the seal at the bushing face so water and grit cannot reach the wear surface. The formulation also passes the ASTM D-1743 Corrosion Test, which guards bearings and journals against rust during seasonal storage.
The same tenacity that resists impact reduces the volume of grease ejected from a fitting during repetitive pounding. Field service can either keep the current schedule and use less grease per cycle or extend the time between greasing, lowering lubricant, labor, and equipment-replacement cost over a season.
GPOR1 is built for heavy-duty, heavy-load-bearing service in adverse outdoor conditions. The NLGI #1 grade is the right choice when ambient temperatures, hose length, or pump capacity require a softer grease than the NLGI #2 version.
This grease is not recommended for automatic or centralized lubrication systems unless the system is engineered to pump a tackier grease. GPOR1 is compatible with many other types of greases, but switching greases is best handled by cleaning the old grease out where possible or flushing the mechanism with a liberal amount of GPOR1 while the equipment is in operation, then monitoring closely for any inconsistencies. Aftermarket grease additives are not required and are not recommended for use with AMSOIL synthetic greases.
| Property | Value |
|---|---|
| NLGI Grade | 1 |
| Thickener | Calcium-Sulfonate Complex |
| Penetration, worked 60 strokes at 25 C (77 F), 0.1 mm (ASTM D-217) | 310-340 |
| Base Oil Viscosity at 40 C (104 F), cSt (ASTM D-445) | 68 |
| Timken OK Load, lbs (ASTM D-2509) | 65+ |
| Four-Ball Weld Point, kgf (ASTM D-2596) | 620+ |
| Four-Ball Wear Test, scar mm (ASTM D-2266) | <0.45 |
| Dropping Point, C (F) (ASTM D-2265) | 321 (610) |
| Water Washout at 100 F, percent loss (ASTM D-1264) | 1 |
| Corrosion Test (ASTM D-1743) | Pass |
GPOR1 is available in 15-oz. cartridges , a 35-lb. pail , and a 120-lb. keg . All AMSOIL lubricants are covered by the AMSOIL Limited Warranty, and using AMSOIL synthetic lubricants does not void a new equipment manufacturer warranty. review NLGI grade selection and water-resistance positioning in the AMSOIL Grease Guide, then order AMSOIL Synthetic Polymeric Off-Road Grease NLGI #1.
Very happy with this product lasts longer than any other brand I have tried keeps all equipment quite and operating smoothly
Would recommend this to a friend.
This product works great on our heavy equipment
Would recommend this to a friend.
NLGI grade measures grease consistency from very fluid (000) to very stiff (6). NLGI #1 is softer than the more common NLGI #2, with a worked penetration of 310 to 340 in ASTM D-217 versus 265 to 295 for NLGI #2. GPOR1 keeps the same calcium-sulfonate-complex chemistry and moly fortification as the NLGI #2 version but moves through long lines and cold pumps more readily.
Choose GPOR1 when ambient temperatures drop below the NLGI #2 pumping window, when supply lines on bulk dispensers or pump systems are long, or when a softer grease is needed to keep equipment serviced through winter. GPOR1 pumps best in temperatures above 0 F, compared with 40 F for GPOR2. Above 40 F, the NLGI #2 grade is generally the better fit for heavy off-road service.
This grease is designed to stay in place over long service intervals, and the same tenacity that benefits pin and bushing service makes it harder to pump than thinner greases. GPOR1 is only recommended for automatic or centralized lubrication systems when the system is specifically designed to successfully pump a tackier grease. Verify the dispenser, hose length, and follower plate configuration before installing this grease in a bulk system.
Yes. The formulation is heavily fortified with 5 percent moly, which matches the Caterpillar recommendation for pin and bushing applications on heavy off-road equipment. Combined with the calcium-sulfonate-complex base, the grease delivers a Four-Ball Weld Point of 620+ kgf and a Timken OK Load of 65+ lbs to support pivot loads on dozers, loaders, and similar machines.
The grease produces only 1 percent loss in the ASTM D-1264 Water Washout test at 100 F and passes the ASTM D-1743 Corrosion Test, so it holds the seal on greased components and shields bearings and journals from rust. This makes GPOR1 a fit for log skidders, road graders, dump trucks, and other equipment routinely exposed to standing water, mud, and crop debris.
GPOR1 is compatible with many other types of greases. When switching, the equipment should be cleaned of the old grease where possible or flushed with a liberal amount of GPOR1 while the mechanism is in operation. Monitor the system closely for any inconsistencies during the transition.
GPOR1 ships in 15-oz. cartridges , cases of 10 cartridges , packs of 40 cartridges , a 35-lb. pail , and a 120-lb. keg . The 400-lb. drum size is offered for the NLGI #2 grade (GPOR2) only.