Quick Answer: The best grease for most heavy equipment is an NLGI #2 lithium-complex EP grease with 3–5% moly for pins, bushings, and pivot joints, and a non-moly lithium-complex or polyurea EP2 for rolling bearings. For wet, muddy, or washdown service, upgrade to a calcium-sulfonate complex grease — it carries the best water-washout and corrosion resistance of any thickener family. One fleet can usually standardize on two greases: a moly EP2 for articulation points and a premium bearing grease.
Heavy equipment destroys grease faster than any other application class: shock loads on pins and bushings, abrasive dust, water and mud, long service intervals, and temperature swings from cold-morning starts to hot hydraulic bays. “Best” is therefore not a brand question — it is a match between thickener chemistry, solid additives, and the specific joint. This guide gives you the decision framework, then the fleet-consolidation logic that keeps the grease cabinet to two or three cartridges.
The Four Specs That Decide Everything
1. Thickener: Lithium Complex vs Calcium Sulfonate
The thickener is the grease’s sponge — it holds the oil and controls water resistance, dropping point, and mechanical stability:
| Thickener | Water Washout | Dropping Point | Strengths | Watch Out |
|---|---|---|---|---|
| Lithium complex | Good | ~260°C | The fleet default: stable, pumpable, widely compatible | Moderate water resistance only |
| Calcium sulfonate | Excellent (<1% typical) | ~300°C | Best-in-class water/corrosion resistance, inherent EP, long life in mud and washdown | Higher cost; check compatibility before mixing |
| Polyurea | Good | ~250°C | Long-life rolling bearings, electric motors | Incompatible with many thickeners; not for pins |
| Aluminum complex / calcium stearate | Good | ~230°C | Niche: food-grade, high-water legacy uses | Lower mechanical stability |
Rule of thumb: dry, dusty sites → lithium complex is fine. Mud, rain, river crossings, or daily washdowns → calcium sulfonate pays for itself in extended joint life.
2. Moly (MoS2): Where 3–5% Earns Its Keep
Pins, bushings, bucket pivots, and slewing joints move slowly, oscillate, and take shock loads — conditions where the oil film collapses and only a solid film prevents metal contact. That is exactly what molybdenum disulfide provides. Specify 3% MoS2 for general articulation points and 5% for severe impact service (rock work, demolition). Rolling bearings and high-speed points are the exception: moly solids add nothing there and can increase heat — see our molybdenum grease guide for the full use/no-use map.
3. NLGI Grade: #2 Is the Default, #1 for Winter, #0/#00 for Centralized Systems
- NLGI #2 — the heavy-equipment default for manual greasing above freezing.
- NLGI #1 — winter grade; flows at temperatures where #2 stalls grease guns and starves joints.
- NLGI #0 or #00 — required by most automatic lubrication systems so the grease pumps through long small-bore lines to every point.
4. Base Oil Viscosity: Match Speed, Not Habit
Slow, heavily loaded joints want a heavier base oil (ISO VG 220–460); faster bearings want lighter (ISO VG 100–150). Most fleet EP2 greases land at ISO VG 150–220 — a workable middle, but slow pins and bushings genuinely benefit from the heavier end.
Match the Grease to the Point
| Grease Point | Recommended Grease | Why |
|---|---|---|
| Pins & bushings (bucket, boom, stick) | Lithium-complex or calcium-sulfonate EP, 3–5% moly, NLGI #2 | Oscillating shock load = boundary lubrication; moly film is mandatory |
| Slew ring / turntable | Moly EP2, heavier base oil | Slow oscillation under full machine weight |
| Wheel & roller bearings | Lithium-complex or polyurea EP2, no moly | Rolling contact; solids add heat, not protection |
| Universal joints / driveline | Moly EP2 | Sliding splines and cross journals |
| Final drive & gearbox (if grease-specified) | OEM spec only — often semi-fluid #00 | Wrong consistency causes leaks or starvation |
Excavator-specific point maps and intervals are in our best grease for excavators guide and excavator grease points diagram.
Fleet Consolidation: The Two-Grease Strategy
Most mixed fleets (excavators, loaders, dozers, haul trucks) can standardize without compromise:
- Articulation grease: one moly EP2 (3% general / 5% severe) for every pin, bushing, pivot, U-joint, and slew ring. In wet regions, make it calcium-sulfonate based.
- Bearing grease: one premium non-moly EP2 (lithium complex, or polyurea where specified) for all rolling bearings and motors.
- Winter swap: the same two products in NLGI #1 when sustained temperatures drop below −10°C.
Consolidation is not just convenience — it eliminates the most expensive grease error in fleet maintenance: the wrong cartridge in the wrong gun. Label guns, and never mix thickener families in one gun without a clean-out.
Delivery Matters as Much as the Grease
The best grease fails when it arrives late. Machines with 20+ grease points serviced daily are candidates for automatic lubrication systems, which meter small amounts while the joint moves — the condition under which grease distributes best. For manual routes, match the grease pump to the fleet size, and remember that #0/#00 winter grades are a system requirement, not a preference, on long auto-lube lines.
Once the grease is specified, delivery matters just as much. See the grease pump selection guide to match pneumatic, electric, or manual pumps to your grease grade and point count — or go straight to the industrial grease pump catalog.
Frequently Asked Questions
What grease do most heavy equipment manufacturers recommend?
Most OEMs specify an NLGI #2 EP grease with moly for pins and bushings and a non-moly EP2 for bearings, with NLGI #1 or #0 for cold climates and centralized systems. The OEM manual overrides every general rule — but where it only says “EP2 moly grease,” a lithium-complex 3% moly product is the safe interpretation.
Is calcium sulfonate grease worth the extra cost?
In wet, muddy, or washdown service, yes — its water-washout resistance (typically under 1%) and inherent corrosion protection measurably extend pin and bushing life. On dry, dusty sites, a quality lithium complex delivers most of the benefit at lower cost.
Should I use moly grease in bearings?
Generally no. Rolling bearings at speed run cooler and longer on non-moly EP or polyurea greases; the solid particles add no value to full-film rolling contact. Moly belongs in slow, oscillating, shock-loaded sliding joints — pins, bushings, fifth wheels, CV joints.
Can I mix lithium complex and calcium sulfonate greases?
Compatibility charts rate some combinations as acceptable, but field practice should be stricter: pick one thickener family per joint and clean out before switching. Mixed thickeners can soften or harden unpredictably, and the joint gives no warning until wear appears.
How often should heavy equipment be greased?
Daily or every 8–10 operating hours for pins and bushings in abrasive service — small, frequent amounts beat large, rare ones because fresh grease purges contaminants. Bearings follow the manufacturer’s hour-based schedule. An automatic lubrication system delivers the small-frequent pattern without labor.
Need Help Building a Fleet Grease Specification?
Tell us your machine list, climate, and washdown routine — request a quote and our engineers will spec the greases, pumps, and fittings as one system. Browse our heavy equipment lubrication solutions for the hardware side.
