The DeWalt cordless grease gun is one of the most underrated tools in my barn. It pumps grease into stubborn trailer hubs that a hand gun cannot crack open, and it works the same hot or cold. But the wrong cartridge can clog the gun, leak past the seal, or simply not lubricate the way modern equipment needs.
I have run dozens of cartridges through my DeWalt DCGG571 over the years. The five below are the ones I keep buying when the box runs empty.
Quick Comparison
| Product | Best For | Rating |
|---|---|---|
| Mobil 1 Synthetic Grease 14 oz | Best overall | 4.8/5 |
| Lucas Oil X-tra Heavy Duty Grease | High pressure | 4.7/5 |
| Valvoline Multi Vehicle Synthetic | All purpose | 4.6/5 |
| Lubrimatic Marine Trailer Grease | Marine and trailer | 4.5/5 |
| Sta-Lube Heavy Duty Lithium | Budget pick | 4.4/5 |
1. Mobil 1 Synthetic - Best Overall
Mobil 1’s synthetic grease pumps smoothly through my DeWalt at 0 degrees and at 100 degrees, never separates in storage, and the lithium complex holds up under load. It is what I run on every tractor fitting.
2. Lucas Oil X-tra Heavy Duty - Best for High Pressure
Lucas X-tra is tacky enough to stay put on vertical pins and dropper joints. The blue color makes overspray easy to see and wipe up. Heavier than Mobil 1, so cold weather pumping requires patience.
3. Valvoline Multi Vehicle Synthetic - Best All Purpose
Valvoline’s multi vehicle is a true do-everything grease. It is what I send with friends who just bought their first DeWalt gun. Versatile, available everywhere, fair price.
4. Lubrimatic Marine Trailer - Best for Boats and Trailers
Lubrimatic Marine has the highest water resistance of any cartridge I have tested. Boat trailer bearings need this kind of grease. Do not substitute lithium grease in submerged applications.
5. Sta-Lube Heavy Duty Lithium - Best Budget
Sta-Lube is the cheapest cartridge I trust. The lithium soap base is consistent, the cartridge wall does not leak, and it works fine in a DeWalt gun. Skip the no-name brands below this price.
What Matters Most
NLGI grade, base oil, and cartridge wall quality. Use NLGI 2 for general DeWalt work. Synthetic base oils pump better cold and last longer hot. Cheap cartridge walls collapse in the gun.
My Setup
I keep the DCGG571 loaded with Mobil 1 for general use and a second gun loaded with Lubrimatic for the boat trailer. Switching guns is faster than purging cartridges.
Common Mistakes
Mixing greases without purging. Different soap bases (lithium, calcium, polyurea) can react and break down. Pump a fitting full of new grease until clean grease comes out the relief side.
Final Recommendation
Mobil 1 synthetic is the grease I have settled on for almost every DeWalt application. Buy a sleeve of cartridges and a marine cartridge or two for trailer hubs and you are set for a year.
Frequently asked questions
Does DeWalt make its own grease cartridges?+
No. DeWalt makes the grease guns; the cartridges are universal 14 ounce tubes from third-party manufacturers. Any standard cartridge will fit a DeWalt 20V Max or 18V grease gun.
What is NLGI grade and does it matter?+
NLGI rates grease consistency from 000 (semi-fluid) to 6 (block). For most DeWalt grease guns, NLGI 2 is the sweet spot. NLGI 1 pumps easier in cold weather; NLGI 3 holds better at high temperatures.