Why Does My Grease Gun Grease Tube Have No NGLI Rating?

You might notice your grease gun tube lacks an NGLI rating, making you wonder if it is the right grease. This matters because the NGLI number tells you the grease’s thickness, which affects how it works in your equipment.

Many grease tubes sold in hardware stores are private label or generic brands that skip NGLI testing to save money. This means you are buying a grease with unknown consistency, which can lead to poor lubrication or gun jams.

Has Your Car’s Ball Joint Failed Because You Couldn’t Get Grease Into the Fitting?

You’re under your truck, freezing, and the grease gun won’t push anything into the zerk fitting. The tube has no NGLI rating, so you don’t even know if the grease is too stiff for cold weather. That’s when you grab the DIYtoolifz Cordless Grease Gun Compatible with DeWalt 20V. It blasts through cold, thick grease instantly, so you never get stranded again.

Here’s what ended my cold-weather frustration for good: DIYtoolifz Cordless Grease Gun Compatible with DeWalt 20V

Why the Missing NGLI Rating Matters for Your Tools

I learned this the hard way when I grabbed a cheap grease tube from the bargain bin. My grease gun started making a grinding noise halfway through greasing my lawn tractor spindles.

What Happens When You Use Mystery Grease

Without an NGLI rating, you have no idea if the grease is too thick or too thin. In my experience, too-thick grease can actually clog your grease gun coupler and make the handle impossible to pump.

I once spent twenty minutes fighting a stuck grease gun on a hot summer day. The tube had no NGLI number, and the grease was like cold peanut butter. My kids were waiting for me to finish so we could go to the pool.

The Real Cost of No NGLI Rating

When you use grease without a known thickness, you risk these problems:

• Your grease gun seals blow out from too much pressure
• Bearings run dry because the grease is too thick to flow
• Grease drips out immediately because it is too thin
• You waste money on a product that does not protect your equipment

I watched a neighbor ruin a zero-turn mower deck spindle because he used bargain grease with no rating. The bearing seized up in less than a month.

Reading Between the Lines on the Tube

Look for any NLGI stamp or number on the back of the tube. If you see nothing, I recommend putting it back on the shelf. In my shop, I only buy tubes with the rating clearly printed, even if they cost a dollar more.

How I Found Grease That Actually Works

After my lawn tractor spindle disaster, I started paying close attention to what was inside those tubes. Honestly, this is what worked for us in my shop.

Check the Base Oil Type First

Even without an NGLI rating, the tube usually lists the base oil. Look for lithium complex or calcium sulfonate on the label. In my experience, these two types handle heat and water better than generic mineral oil.

I started buying only tubes that clearly stated the thickener type. It made a huge difference in how my grease gun performed.

My Simple Test for Mystery Grease

If I am stuck with an unrated tube, I do a quick squeeze test before loading it:

• Squeeze a pea-sized dab onto a piece of cardboard
• Press it flat with my thumb
• If it oozes like honey, it is probably NLGI 1 or 2
• If it stays stiff like cold butter, skip it

This saved me from ruining another bearing. I wish I had known this trick years ago.

You know that sinking feeling when you pump the handle and nothing comes out, or worse, grease shoots everywhere but where you need it. That is exactly why what I grabbed for my shop has an actual NGLI rating printed right on the tube, so I never have to guess again.

What I Look for When Buying Grease Tubes

After all my mistakes, I have a simple checklist I use every time I grab a tube off the shelf. Here is what I check before I buy.

Look for a Brand Name You Recognize

I stick with brands like Lucas, Mobil, or Shell. They have a reputation to protect. No-name tubes are the ones that usually skip the NGLI testing to save a few cents.

Check the Label for the Thickener Type

I flip the tube over and look for the words “lithium complex” or “calcium sulfonate.” If the label just says “grease” with no details, I put it back. That is a red flag for mystery ingredients.

See If the Tube Has a Temperature Range

A good grease tube lists a working temperature range. If you see something like “-20°F to 350°F,” that tells you the manufacturer did their homework. No temperature range usually means no testing at all.

Feel the Tube Before You Buy

I squeeze the tube gently in the store. If it feels rock hard or overly soft compared to others, I skip it. Consistent firmness usually means consistent quality inside.

The Mistake I See People Make With Unrated Grease Tubes

I watch guys grab the cheapest tube on the shelf because they think all grease is basically the same. That is the mistake that costs you money and ruins your equipment.

They assume a grease tube is a grease tube. But the truth is, a tube with no NGLI rating is a gamble. You might get something that works fine for a year, or you might get a batch that separates into oil and soap inside the tube. I have seen it happen.

What you should do instead is simple. If the tube has no rating, walk away. Even if it is half the price of a name brand. I learned that paying a dollar more now saves me fifty dollars in repairs later. My neighbor still buys the cheap stuff, and he still replaces spindles every season.

You know that sinking feeling when you pump your grease gun and nothing comes out, but then grease suddenly explodes everywhere except where you need it. That is exactly why what I finally switched to has a clear rating on the label, so I never waste another tube of mystery grease.

Here Is the One Thing That Changed Everything for Me

I finally figured out why some tubes have no NGLI rating. It is not because the grease is bad. It is because the company selling it did not pay for the testing. NGLI certification costs money, and many private label brands skip it to keep their price low.

Here is the aha moment for me. The grease inside might be perfectly fine, but without the rating, you have no way to know. I started calling the 800 numbers on the back of the tubes. One customer service rep told me straight up that their grease was NLGI 2, but they just chose not to pay for the stamp on the tube.

My tip for you is simple. If you find a tube with no NGLI rating, call the company. Ask them what NLGI grade they use. If they cannot tell you, put the tube back. If they can, you just got the same information for free that the label would have cost them money to print.

My Top Picks for Grease That Will Not Let You Down

After all my trial and error with mystery grease tubes, I have two go-to products I trust. Here is exactly what I use and why.

SHALL Mini Grease Gun Kit 3.52OZ 3000PSI with Accessories — Perfect for Tight Spots

The SHALL Mini Grease Gun Kit is what I grab for small jobs around my lawn equipment. It comes pre-filled with 3.52 ounces of grease that has a clear NGLI rating. I love that I can slip it into my tool bag and grease my zero-turn spindles without dragging out the big gun. The only trade-off is the small size means you will need multiple tubes for bigger jobs.

Lincoln 1142 Lever Action Grease Gun HD Cast Iron Pump — Built to Last

The Lincoln 1142 Lever Action Grease Gun is the heavy-duty workhorse I keep in my main toolbox. It has a cast iron pump head that handles any grease I put in it, even the stiff stuff. This gun is perfect for anyone who greases equipment regularly and wants something that will not break after a season. The honest trade-off is it costs more than a plastic gun, but mine has lasted five years so far.

Conclusion

The most important thing I learned is that a missing NGLI rating is a red flag, not a deal breaker, but you should always verify what you are buying before you pump it into your equipment.

Go check the grease tubes in your toolbox right now and see which ones have a rating printed on them. If you find any mystery tubes, swap them out this weekend before your next greasing job.

Frequently Asked Questions about Why Does My Grease Gun Grease Tube Have No NGLI Rating?

Can I use a grease tube with no NGLI rating in my grease gun?

You can use it, but I do not recommend it. Without the rating, you are guessing at the grease thickness. That gamble can clog your gun or leave your bearings dry.

In my experience, it is better to buy a tube with a clear rating. You will save yourself the headache of a jammed gun and wasted time cleaning up messes.

What does the NGLI number actually tell me about the grease?

The NGLI number tells you how thick or thin the grease is. A lower number like NLGI 0 is runny like pudding. A higher number like NLGI 3 is stiff like cold butter.

Most grease guns work best with NLGI 2 grease. That is the standard thickness for general purpose use. Knowing this number helps you pick the right grease for your tools.

Why would a company skip getting an NGLI rating on their grease?

Companies skip the rating to save money. The testing process costs hundreds of dollars per batch. Smaller brands would rather keep their prices low than pay for certification.

That does not mean the grease is bad. It just means you have no proof of quality. I personally avoid unrated tubes because I value the peace of mind a rating gives me.

What is the best grease tube for someone who needs a guaranteed NGLI rating?

If you want a tube with a guaranteed NGLI rating, you need a product from a trusted brand. I understand the frustration of buying mystery grease and hoping it works. That is why what I keep in my toolbox always has the rating clearly printed on the label so I never have to guess.

The SHALL Mini Grease Gun Kit comes pre-filled with rated grease and includes handy accessories. It is perfect for small jobs where you want guaranteed quality without buying a full-size tube. I grab mine for quick greasing of my lawn mower spindles.

Which grease gun won’t let me down when I have to pump mystery grease?

If you are stuck with unrated grease, you need a gun that can handle anything. I have been in that situation where the grease is too stiff and a cheap gun just gives up. That is why what I finally bought for my shop has a cast iron pump that powers through even the thickest mystery grease.

The Lincoln 1142 Lever Action Grease Gun has a heavy-duty cast iron pump head that does not flex or break. It costs more upfront, but mine has lasted five years and handled every tube I have thrown at it. That is real value for anyone who greases equipment regularly.

Can I test the thickness of unrated grease at home?

Yes, you can do a simple squeeze test. Put a pea-sized dab on cardboard and press it flat with your thumb. If it oozes like honey, it is probably around NLGI 2. If it stays stiff like cold butter, it is thicker.

This test is not perfect, but it helps. I use it when I find an old tube in my garage with no label left. It beats guessing and risking a clogged grease gun.