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If you have swapped to polyurethane bushings for sharper handling, you already know the trade-off: that relentless creak, groan, and squeak from every bump and turn. The right grease is the only thing that kills the noise without hurting the bushing material, and picking a petroleum-based lube by mistake can actually swell and ruin your poly parts. This guide breaks down the handful of silicone and synthetic greases that poly bushings actually tolerate — so you stop chasing greasy fingers and start enjoying a quiet, planted ride.
I’m Min Islam — the founder and writer behind Trending Car. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Below are the four top-rated options to keep your suspension silent, from a massive value tub to a boutique aerospace lubricant — this is the real shortlist for the best grease for polyurethane bushings you can buy right now.
Our Picks at a Glance
How To Choose The Best Grease for Polyurethane Bushings
Polyurethane is a tough, long-lasting material — but it hates petroleum-based lubricants. Regular chassis grease contains mineral oil that soaks into poly and makes it swell, turning that tight bushing into a squishy, noisy mess. The right grease uses a silicone, synthetic, or PFPE base that stays chemically inert against polyurethane, so the bushing stays firm and quiet.
Pick the Right Base Chemistry
Look for a grease that is explicitly labeled as safe for polyurethane or uses a silicone, pure PFPE, or PTFE base. These materials do not react with the polymer the way hydrocarbon greases do. If the tube does not say “safe for poly” or “silicone-based”, it is probably a petroleum product you should skip.
Match the Volume to Your Project
A full suspension swap (control arms, sway bars, leaf springs) can soak up 8 to 14 ounces of grease easily. A smaller tube around 2 ounces is enough for a single sway bar or a set of control arm bushings. Look at how many bushings you need to pack — buying a giant tube for one small job can waste money, but running out mid-project is worse.
Consider Grease Gun Compatibility
Some of these greases come in standard grease-gun cartridges, while others are thick enough to require a dedicated gun. The tube format matters: a 14-ounce tube that fits a standard grease gun saves you from scooping and packing by hand. If a grease is extremely sticky (most of the good ones are), a grease gun with a coupler keeps your hands clean and gets the lube deeper into the bushing’s inner sleeve.
Quick Comparison
| Model | Best For | Volume | Base Material | Rating | Amazon |
|---|---|---|---|---|---|
| Energy Suspension Formula 5 Prelube★ Best Overall | Best Overall | 8 oz | Synthetic | 4.8/5 | Amazon |
| Prothane 19-1751 Super Grease | Best Value | 14 oz | Polyurethane | 4.7/5 | Amazon |
| Hotchkis 3101 Super Grease | Premium Pick | 14 oz | Silicone | 4.8/5 | Amazon |
| Krytox GPL 204 Grease | Heavy Duty | 2 oz | Ptfe | 4.6/5 | Amazon |
In‑Depth Reviews
1. Energy Suspension – 9.11104 Formula 5 Prelube
Our pick — over 4.5★ from 600+ verified ratings; the strongest balance of quality and price.
The 8-ounce tub that stays sticky and keeps polyurethane bushings quiet through every season.
This synthetic grease is engineered specifically for polyurethane components — it resists the road salt, oil, and torque that destroy rubber bushings over time. Buyers report it is “extremely sticky, durable bushing grease; resists pressure-washers,” meaning one application holds up to the underside of a daily driver and a high-pressure spray at the car wash.
A single 8-ounce tub covers an entire front-end bushing swap; owners have used it on a Toyota pickup and a 1972 GMC C15 and still had a third of the can left. The only downside is cleanup — owners mention it is “difficult to remove from skin” and requires grit cleaner or brake solvent, so wear tight rubber gloves.
Unlike the smaller 2-ounce Krytox tube, this comes in a generous tub and at a fraction of the price-per-ounce. It is not petroleum-based, so it will not swell your poly parts. For a first-time bushing job or a full suspension refresh, this is the safest bet for lasting silence.
Why it wins
- 8 oz is enough for a full suspension set
- Holds up to pressure washers and road salt
- 620 ratings with a 4.8/5 average
The catch
- Very sticky — needs solvent to clean off hands
- Does not fit a standard grease gun tube format
Reach for this if: you are doing a full front-end bushing replacement and want a proven, affordable grease from a brand that has been formulating poly lube for over two decades.
Look elsewhere if: you need a grease-gun cartridge and prefer not to scoop and pack by hand.
2. Prothane 19-1751 Super Grease Tube – 14 oz.
A massive 14-ounce tube that a full-time mechanic will not finish for years.
Prothane’s Super Grease comes in a 14-ounce tube — the exact same volume as the Hotchkis but at a notably lower cost per ounce. Customers note it is “the only grease to quiet squeaky urethane bushings.” It is compatible with polyurethane from any manufacturer, not just Prothane’s own parts, which makes it a universal go-to for any noisy suspension job.
Reviewers point out it is “super sticky” and will require “a separate grease gun just for this” because the residue does not wash off easily. One owner used it on Dirt King Upper Control Arms and confirmed it stopped the squeaking immediately. The 14-ounce format holds 14 ounces, compared to the Krytox 2-ounce tube, so it stretches across multiple vehicles or multiple suspension corners.
This is the pick if you have a grease gun and want a bulk supply that does not run out halfway through a project. Keep in mind one reviewer noted it “didn’t quiet them” even though it was the right grease — so application depth matters: you want to pack the inner sleeve thoroughly, not just smear the outside.
The bulk advantage
- 14 oz is more than you will likely ever use on one car
- Works with poly bushings from any brand
- Fits a standard grease gun
Watch for
- Extremely tacky — dedicate a grease gun to it
- One reviewer got no squeak relief, possibly from shallow application
Grab this if: you work on multiple vehicles or just want a tube of grease that will last through the next decade of suspension jobs without needing a refill.
skip it if: you only need a single sway-bar application — the 8-ounce tub is cheaper and less wasteful.
3. Hotchkis 3101 Super Grease – 14 oz.
A silicone-based formula engineered to keep poly bushings quiet — and stay put for years.
Hotchkis specifically formulated this grease to keep polyurethane bushings quiet, and it works with greaseable sway bar bushings from both Hotchkis and Energy Suspension. One frustrated buyer wrote: “The squeaking was driving me NUTS! Not sure why Hotchkis didn’t include this with my k+ suspension system, but it was definitely necessary.” That is the kind of real-world proof that this lube solves the exact problem poly owners face.
The 14-ounce tube holds the same volume as the Prothane, but Hotchkis uses a silicone base rather than polyurethane, which gives it a different chemical profile — silicone stays inert in more extreme temperature swings. It is also ideal for use in grease guns, so you can shoot it directly into zerk fittings on your control arms or sway bar bushings without scooping.
Shoppers say it is “very sticky” and “stays put for a long time.” At 12 ounces item weight vs 14 fluid ounces volume, the tube is dense; it covers a full suspension build with plenty left over. Compared to the 8-ounce Energy Suspension tub, this gives you 14 ounces versus 8 ounces in a gun-ready tube, though it costs more upfront.
Built for the job
- Silicone base is chemically safe for polyurethane
- 14 fluid ounces — enough for multiple vehicles
- Grease-gun compatible with standard couplers
One thing to know
- Item weight is listed at 12 oz, less than the 14 oz of grease inside due to packaging
Choose this if: you own a premium suspension system like Hotchkis’ own and want the exact grease the suspension engineers designed for it.
Pass if: you are on a tight budget — the Energy Suspension 8-ounce tub costs less and covers a single car just fine.
4. Krytox by Chemours GPL 204 Grease, 2 oz Tube
An aerospace-grade PFPE grease that costs more per ounce than anything else here — but lasts through salt brine and extreme temps.
Krytox GPL 204 is a pure PFPE/PTFE grease with no hydrogen or silicone, meaning it is chemically inert and will not react with oxygen, solvents, or salt. For your polyurethane bushings, that translates to a lubricant that one buyer says “has been great since putting it on” even after a Wisconsin winter of salt brine blasting the underside. Compared to the 14-ounce Hotchkis tube (which holds 14 fluid ounces), this tiny 2-fluid-ounce tube holds 2 fluid ounces — but the Krytox is in a different league for extreme conditions.
Its temperature range runs from -51°C through 179°C, so it handles both a frozen driveway and a track-day brake-heated suspension. It is nonflammable and passes impact standards with liquid oxygen, which is overkill for a street car but means it will never break down under normal use. Buyers also use it on mechanical keyboard switches and sunroof tracks because it stays buttery smooth without attracting dirt.
The catch is the price: at roughly per ounce, this is a luxury item. For one sway bar or control arm set, a 2-ounce tube is enough. But for a full suspension build, you will run out fast — that is where the Prothane or Hotchkis 14-ounce tubes make more sense.
What justifies the cost
- Chemically inert — safe with polyurethane, oxygen, and solvents
- Extreme temp range: -51°C to 179°C
- Nonflammable, no hydrogen or silicone
The trade-off
- Only 2 fluid ounces — barely enough for one axle set
- Very expensive per ounce compared to silicone or synthetic alternatives
Get this if: you live in a salt-belt state, low-temp performance matters, or you want the most chemically stable grease money can buy for a single critical bushing.
pass on it if: you have a full suspension to pack — a 14-ounce tube of Hotchkis or Prothane will do the same job for less total cost.
Understanding the Specs
Base Chemistry: Silicone vs Synthetic vs PFPE
The base grease is the single most important spec for polyurethane. A petroleum-based grease will swell and degrade the bushing material. Look for a lubricant that is explicitly silicone-based, synthetic (like Energy Suspension’s Formula 5), or pure PFPE/PTFE (like Krytox). These three chemistries are inert against polyurethane and will keep the bushing tight and quiet. If the label says “lithium complex” or “moly grease”, keep it off your poly parts.
Volume and Tube Format
Grease comes in tubs (8 ounces) and tubes (14 ounces or 2 ounces). A 14-ounce tube is overkill for a single sway bar but perfect for an entire SUV’s control arms and leaf springs. A 2-ounce tube is enough for one set of greaseable sway bar bushings. Also check whether the container fits a standard grease gun — tubes with the threaded end let you load a gun and pump the grease deep into the bushing’s inner sleeve without disassembling the suspension.
FAQ
Can I use regular chassis grease on polyurethane bushings?
How often should I re-grease polyurethane bushings?
Will the Energy Suspension Formula 5 Prelube fit a grease gun?
What is the difference between the Prothane 14 oz tube and the Hotchkis 14 oz tube?
Is Krytox GPL 204 safe for all polyurethane bushings?
How much grease do I need for a full suspension swap?
Can I mix two different greases on the same bushing?
Why do my polyurethane bushings squeak even after applying grease?
Final Thoughts: The Verdict
If you want one dependable pick, the best grease for polyurethane bushings winner is the Energy Suspension Formula 5 Prelube because it has the highest average rating (4.8/5 from 620 reviews), the right synthetic base, and enough volume for a full suspension while staying affordable. If you want a grease-gun-friendly tube that lasts through years of future projects, grab the Prothane 19-1751 Super Grease. And for the buyer who needs extreme chemical stability and salt-brine resistance above all else, the standout is the Krytox GPL 204.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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