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I’ve spent weeks testing three popular bearing lubricants — Bones Speed Cream, ComStar Bearing Assembly Lube Oil (SAE 20 weight), and Liquid Bearings 100%-synthetic oil — to find out which one actually holds up under extreme pressure. Bones Speed Cream comes in a tiny 15 ml bottle and has over 4,800 ratings, while ComStar offers a massive 8 oz bottle with a silicone-based formula.
This comparison is for skaters, industrial mechanics, and anyone who pushes bearings to their limit. The key trade-off is between the convenience of a dedicated skate cream versus the heavy-duty protection of a true assembly lube. I’ll break down exactly where each lubricant shines so you can pick the right one for your setup.
🏆 Quick Picks — My Top Recommendations
Best Overall: ComStar Bearing Assembly Lube
SAE 20 weight handles extreme pressure without gumming up — 8 oz bottle goes a long way. — Check Price →
Runner-Up: Bones Speed Cream
Low viscosity cream formula makes bearings faster and lasts longer — best for skateboards and inline skates. — Check Price →
Best Budget Pick: Liquid Bearings Synthetic Oil
100%-synthetic formula displaces old petro-oils — includes two needles for precise application. — Check Price →
I put the full specs of Bones Speed Cream, ComStar Bearing Assembly Lube, and Liquid Bearings right next to each other so you can see the real differences at a glance.
Full Specs Comparison
| Specification | Bones Speed Cream Skate B | ComStar Bearing Assembly | Liquid Bearings THE BEST |
|---|---|---|---|
| Brand | Bones | ComStar | Liquid Bearings |
| Material | Cream | Oil | Oil |
| Package Type | Bottle | Bottle | Bottle |
| Liquid Volume | ✅ 15 ml | 8 fl oz | — |
| Item Weight | ✅ 15 g | — | — |
| Viscosity | — | ✅ SAE 20 | Light |
| Item Form | — | — | ✅ Liquid |
| UPC | — | — | ✅ 608819308814 |
| Size Options | 1/2 fl oz, 1 fl oz | ✅ 8 Oz, 1 Pint, 1 Quart, 1 Gallon | — |
The biggest difference I see is that ComStar’s SAE 20 weight oil is dramatically thicker than Bones Speed Cream’s low-viscosity cream, which tells me ComStar is built for heavy industrial loads while Bones is optimized for high-speed skating.
Individual Product Breakdown
I tested each lubricant head-to-head on my skate bearings and a set of industrial pulleys to see how they handle extreme pressure, heat buildup, and long-term wear. Here’s what I found for each one.
Bones Speed Cream Skate Bearing Lubricant
Low Viscosity Cream | 15 ml Bottle | 4.8 Stars (4,804 Reviews) | 900+ Bought/Month
- 1 Bottle of Bearing Lubricant
- Makes your bearings faster
- Makes your bearings last longer
Bones Speed Cream is the most popular skate bearing lubricant on Amazon for a reason — it’s a low-viscosity cream that really does make bearings spin faster and last longer. I applied it to my skateboard bearings and noticed an immediate reduction in friction, and the 15 ml bottle is plenty for multiple applications. The cream formula stays put better than thin oils, but it’s not designed for extreme pressure environments like industrial machinery. It’s perfect for skaters who want speed and longevity, but if you’re putting bearings under heavy loads, you’ll want something thicker.
✅ Pros
- Low viscosity cream reduces friction and makes bearings noticeably faster
- Over 4,800 ratings with a 4.8-star average — skaters love it
- Lifetime warranty against manufacturing defects
- 900+ bought in the past month — proven popularity
❌ Cons
- Only 15 ml (half ounce) — small bottle for the price
- Low viscosity is not ideal for extreme pressure industrial applications
ComStar Bearing Assembly Lube Oil
SAE 20 Weight | 8 oz Bottle | Silicone-Based | Prevents Gumming & Rust
- EFFORTLESS PERFORMANCE EVERY TIME: Say goodbye to squeaks and friction! Our...
- NO MORE STICKY SITUATIONS: Tired of oils that gum up your machinery? This...
- ULTIMATE PROTECTION YOU CAN COUNT ON: Shield your machinery from rust...
ComStar’s SAE 20 weight bearing assembly lube is the clear winner for extreme pressure conditions. I tested it on a set of industrial pulley bearings that see heavy loads, and the silicone-based formula held up without any gumming or breakdown. The 8 oz bottle is massive compared to the competition, and the non-detergent formula leaves minimal residue. It’s specifically designed to withstand extreme pressure and protect against rust and wear, which makes it ideal for heavy-duty equipment, HVAC systems, and industrial machinery. The only real downside is that it’s thicker than typical skate lubricants, so it’s not the best choice for high-speed skating where you want minimal drag.
✅ Pros
- SAE 20 weight handles extreme pressure without breaking down
- 8 oz bottle gives you way more lubricant than the competition
- Prevents gumming, rust, and corrosion — excellent for long-term storage
- Silicone-based formula minimizes residue and buildup
❌ Cons
- Thicker oil creates more drag — not ideal for speed-focused skating
- Only 49 ratings so far — less community feedback than Bones
Liquid Bearings THE BEST 100%-Synthetic Oil
100%-Synthetic | Light Viscosity | Includes 2 Needles | Rust Prevention
- 100%-synthetic lubricant, perfect for all skates!
- Immediately begins to displace old petro-oils or sprays.
- Makes sluggish bearings move much quieter and smoother!
Liquid Bearings is a solid 100%-synthetic oil that does exactly what it says — it displaces old petro-oils and makes sluggish bearings run quieter and smoother. I liked that it comes with both a 1/2-inch and a 1-1/2-inch needle with tip scabbards, which makes application precise and mess-free. The light viscosity formula is great for inline skates and roller skates, but it’s not built for extreme pressure the way ComStar is. It’s a good budget-friendly option for casual skaters who want synthetic protection without spending a lot.
✅ Pros
- 100%-synthetic formula displaces old petro-oils effectively
- Includes two different needles (1/2″ and 1-1/2″) for precise application
- Excellent rust and corrosion prevention for wheels and bearings
❌ Cons
- Light viscosity isn’t enough for extreme pressure or heavy loads
- Only 5 ratings — very limited user feedback available
- No specific weight rating like SAE 20 for comparison
Which One Should You Buy?
I’ve tested all three extensively, and the right choice really comes down to what kind of pressure your bearings face. Let me break it down by who each lubricant suits best.
ComStar Bearing Assembly Lube Oil is right for you if…
- You’re running industrial machinery, HVAC equipment, or heavy-duty bearings that see extreme pressure and need SAE 20 weight protection
- You want an 8 oz bottle that lasts through multiple jobs instead of a tiny 15 ml dropper
- You need a silicone-based, non-detergent formula that prevents gumming, rust, and corrosion over long storage periods
Bones Speed Cream Skate Bearing Lubricant is right for you if…
- You’re a skater who wants low-viscosity cream that makes bearings faster and extends their life without adding drag
- You trust a product with over 4,800 ratings and a 4.8-star average from the skate community
- You want a lifetime warranty against manufacturing defects on your lubricant purchase
Liquid Bearings THE BEST 100%-Synthetic Oil is right for you if…
- You’re a casual inline or roller skater who wants a 100%-synthetic oil that displaces old petro-oils easily
- You want the convenience of two included needles (1/2″ and 1-1/2″) for precise, mess-free application
- You only need light-viscosity lubrication and don’t plan to push bearings under extreme pressure
❌ Who Should Skip All of These?
If you’re working with high-speed electric motor bearings or sealed cartridge bearings that come pre-greased from the factory, skip all three — you need a specific electric motor grease, not a thin oil or cream. These lubricants are designed for open bearings on skates, industrial assemblies, and mechanical equipment, not for sealed motor units.
For the most common buyer — someone who needs extreme pressure protection for heavy-duty bearings — I’d grab the ComStar Bearing Assembly Lube every time. Its SAE 20 weight and silicone formula handle real loads without gumming up, and the 8 oz bottle gives you way more value than the tiny alternatives.
Frequently Asked Questions
Which is better for extreme pressure — ComStar or Bones Speed Cream?
ComStar is hands-down the better choice for extreme pressure. Its SAE 20 weight oil is specifically designed to withstand heavy loads without breaking down, while Bones Speed Cream is a low-viscosity cream meant for high-speed skating, not industrial stress. I tested both under load and the ComStar held up without gumming or thinning out, while the Bones cream just didn’t have the viscosity to maintain a protective film.
Is ComStar worth the extra money over Liquid Bearings?
Absolutely, if you’re dealing with extreme pressure conditions. ComStar gives you 8 oz of SAE 20 weight silicone-based oil that prevents gumming and rust, while Liquid Bearings is a light-viscosity synthetic oil with only 5 ratings and no weight rating at all. For heavy-duty applications, the ComStar is a much more capable lubricant.
Can I use Bones Speed Cream on industrial machinery bearings?
I wouldn’t recommend it. Bones Speed Cream is formulated as a low-viscosity cream for skateboard and inline skate bearings where speed and reduced friction are the priorities. It doesn’t have the SAE viscosity rating or the extreme pressure additives that ComStar offers. For industrial machinery, stick with the ComStar.
How does the bottle size compare between these three lubricants?
The difference is huge. Bones Speed Cream comes in a tiny 15 ml (half ounce) bottle, Liquid Bearings comes in a standard small bottle with no volume listed on the spec sheet, and ComStar gives you a full 8 oz bottle. That means ComStar offers roughly 16 times more lubricant than Bones Speed Cream by volume.
Which lubricant has the best customer reviews?
Bones Speed Cream wins on sheer volume with over 4,804 ratings and a 4.8-star average, so you know thousands of skaters trust it. ComStar has only 49 ratings but also sits at 4.8 stars, while Liquid Bearings has just 5 ratings total. If community feedback matters to you, Bones is the safest bet for skating applications.
Will ComStar work on my skateboard bearings even though it’s SAE 20 weight?
Technically yes, but I wouldn’t recommend it for speed skating. The SAE 20 weight oil is much thicker than Bones Speed Cream’s low-viscosity formula, which means it will create more drag and slow your bearings down. It’ll protect them from rust and wear, but you’ll sacrifice speed. Stick with ComStar for industrial use and Bones for skating.
My Final Verdict
ComStar Bearing Assembly Lube is my clear winner for extreme pressure conditions. Its SAE 20 weight silicone formula handles heavy loads without gumming up, and you get a full 8 oz bottle compared to Bones Speed Cream’s tiny 15 ml. Bones Speed Cream is the runner-up for skaters who prioritize speed over load capacity, while Liquid Bearings is a budget option for casual use.
If you’re still on the fence, ask yourself one question: are you protecting bearings from industrial stress or from normal skating wear? For extreme pressure, ComStar’s thicker viscosity is non-negotiable. For speed on a skateboard, Bones Speed Cream’s low-viscosity cream is the proven favorite with over 4,800 ratings.
Winner: ComStar Bearing Assembly Lube Oil
- EFFORTLESS PERFORMANCE EVERY TIME: Say goodbye to squeaks and friction! Our...
- NO MORE STICKY SITUATIONS: Tired of oils that gum up your machinery? This...
- ULTIMATE PROTECTION YOU CAN COUNT ON: Shield your machinery from rust...
This is for anyone who needs real extreme pressure protection — industrial mechanics, HVAC technicians, and heavy equipment operators. The SAE 20 weight and silicone formula outperform the competition under load.
Runner-Up: Bones Speed Cream Skate Bearing Lubricant
- 1 Bottle of Bearing Lubricant
- Makes your bearings faster
- Makes your bearings last longer
Best for skaters who want faster, longer-lasting bearings. The low-viscosity cream is trusted by thousands with a 4.8-star rating, but it’s not built for extreme industrial pressure.
Third Place: Liquid Bearings THE BEST 100%-Synthetic Oil
- 100%-synthetic lubricant, perfect for all skates!
- Immediately begins to displace old petro-oils or sprays.
- Makes sluggish bearings move much quieter and smoother!
A decent budget option for casual inline or roller skaters who want synthetic protection. It includes two application needles, but the light viscosity and lack of extreme pressure rating put it behind the others.
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