★ Low-Viscosity · ABS / ESP / EHB
Sinolook DOT 4 LV Brake Fluid (DOT 4+ PLUS)
Low-viscosity high-performance brake fluid engineered for modern ABS, ESP and electro-hydraulic braking systems requiring fast valve response in cold climates.
- Dry boiling point 265 °C · Wet boiling point 170 °C
- Certified to FMVSS 116, ISO 4925 Class 4, SAE J1703, GB HZY4
- Independently tested at ABIC Testing Laboratories (USA)
- Available bulk, drum, IBC and retail packaging — OEM & private label welcome
265 °C
Dry Boiling Point
170 °C
Wet Boiling Point
LV Grade
ISO Class 4
25 yrs
Manufacturing Experience
Product Overview
DOT 4 LV Brake Fluid (DOT 4+ PLUS)
DOT 4 LV (low-viscosity) is the modern evolution of DOT 4 — same chemistry, dramatically lower kinematic viscosity at low temperatures. The 1,000 mm²/s viscosity at −40 °C enables fast ABS modulator and ESP valve response, which is why most European and Asian OEMs since 2010 specify DOT 4 LV for vehicles with electronic stability control.
Manufactured at our IATF 16949:2016 certified plant in Nan'an, Fujian, Sinolook DOT 4 LV is a synthetic glycol-ether blend meeting all four major standards: FMVSS 116, ISO 4925 Class 4, SAE J1703, and GB 12981 HZY4.
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Industry-leading cold flow
1,000 mm²/s at −40 °C — 33% lower than standard DOT 4. ABS solenoids cycle faster and ESP intervention is more responsive in winter conditions.
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High dry boiling point
Typical 265 °C dry ERBP, 15 °C above the ISO 4925 Class 4 minimum and 35 °C above the FMVSS 116 minimum.
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Modern OEM-spec match
Aligned with the brake fluid specifications used by most European and Asian vehicle manufacturers since 2010 for ESP-equipped vehicles.
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Backward compatible
Fully miscible with DOT 3, DOT 4 and DOT 4+. Direct upgrade fill — no system flush required.
Technical Specifications
Sinolook DOT 4 LV — typical production values
Enterprise typical values from current production batches. Every shipment is supplied with a Certificate of Analysis (COA) listing the batch-specific results. Independent ABIC test reports against FMVSS 116, ISO 4925, and SAE J1703 are available on request.
| Property | Test method | Typical value | ISO 4925 Class 4 min. |
|---|---|---|---|
| Appearance & Chemistry | |||
| Appearance | Visual | Clear, transparent | Free of suspended matter |
| pH value | ISO 4925 §6.3 | 7.9 | 7.0 – 11.5 |
| Boiling Point | |||
| Equilibrium reflux boiling point (Dry ERBP) | ISO 4925 §6.2 | 265 °C | ≥ 230 |
| Wet equilibrium reflux boiling point (Wet ERBP) | ISO 4925 §6.2.6 | 170 °C | ≥ 155 |
| Kinematic Viscosity | |||
| Viscosity at −40 °C | ISO 4925 §6.1 | 1,000 mm²/s | ≤ 1500 |
| Viscosity at 100 °C | ISO 4925 §6.1 | 2.0 mm²/s | ≥ 1.5 |
| Corrosion (120 h @ 100 °C ± 2 °C, mg/cm²) | |||
| Tinned iron / Steel / Cast iron | ISO 4925 §6.5 | Within tolerance | ±0.2 |
| Aluminium | ISO 4925 §6.5 | Within tolerance | ±0.1 |
| Brass / Copper / Zinc | ISO 4925 §6.5 | Within tolerance | ±0.4 |
| Rubber Compatibility (120 °C, 70 h) | |||
| SBR — hardness change (IRHD) | ISO 4925 §6.10 | Within tolerance | ≤ −15 |
| SBR — volume increase | ISO 4925 §6.10 | Within tolerance | 1 – 16% |
| EPDM — hardness change (IRHD) | ISO 4925 §6.10 | Within tolerance | ≤ −15 |
| EPDM — volume increase | ISO 4925 §6.10 | Within tolerance | 0 – 10% |
Typical values from production batch. Highlighted figures indicate margin above the ISO 4925 Class 4 minimum requirement. Complete test reports — including fluidity, water tolerance, oxidation and stroking — issued per shipment by ABIC Testing Laboratories.
Recommended Applications
Where Sinolook DOT 4 LV is used
DOT 4 LV is positioned for specific application profiles where its combination of boiling points, viscosity and chemistry delivers measurable advantages over standard grades.
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Modern cars with ABS / ESP
The default specification for most European and Asian vehicles built since 2010 with electronic stability control.
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Hybrid & mild-hybrid vehicles
Where regenerative-friction blending requires brake-by-wire-like response from the hydraulic system.
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Cold-climate applications
Vehicles operating in northern climates where −40 °C viscosity directly impacts ABS responsiveness.
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High-end motorcycles
Premium motorcycles with cornering-ABS and traction control benefiting from lower-viscosity hydraulic response.
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Modern commercial fleets
Buses, delivery vans and light commercial trucks specifying DOT 4 LV for their stability control systems.
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OEM service programs
Authorized service network filling specification for vehicles originally factory-filled with low-viscosity DOT 4.
Note: Always check the brake fluid reservoir cap on the master cylinder for the manufacturer's specification. Never use a fluid grade lower than specified. Glycol-ether brake fluids must never be mixed with DOT 5 silicone.
B2B Capability
Flexible packaging, OEM & global supply
Sinolook DOT 4 LV is supplied in every commercial format — from 250 ml retail bottles for the aftermarket through to ISO tanks for high-volume lubricant blenders and OEM brake-system suppliers.
SERVICE 01
OEM & private label
Custom label design, custom bottle / drum colors, dedicated SKU codes. Artwork approval to first shipment in 25 – 35 days.
SERVICE 02
Retail & bulk packaging
250 ml · 500 ml · 1 L retail bottles · 5 L, 20 L, 200 L drums · 1,000 L IBC totes · flexitank · ISO tank.
SERVICE 03
Global logistics
Direct shipment ex Xiamen, Hong Kong or Singapore. FOB / CIF / DDP terms. UN 1992 / IMDG-compliant export packing.
SERVICE 04
Documentation per shipment
Technical Data Sheet (TDS), Safety Data Sheet (SDS), Certificate of Analysis (COA), AMECA notification, certificate of origin and CIQ documents.
Learn More
Brake fluid resources
In-depth guides on brake fluid chemistry, standards, and selection — written by our technical team.
Reference
Types of Brake Fluid Explained: DOT 3, 4, 4+, 5, 5.1, HZY6, Class 7
Every brake fluid grade compared — composition, boiling points, applications and selection chart.
Technical
Brake Fluid Boiling Point: Dry vs Wet, Why It Matters
How the ERBP test works, why fluid absorbs moisture, and how brake fade actually happens.
Standards
Brake Fluid Standards: FMVSS 116, ISO 4925, SAE J1703 & GB 12981
A B2B reference on the four major brake fluid standards and how they map to OEM specifications.
Compatibility
Can You Mix Brake Fluids? DOT 3, 4, 5.1 & DOT 5 Compatibility
A complete compatibility matrix — which combinations are safe, which will destroy your brake system.
EV / Hybrid
Brake Fluid for EVs & Hybrids: Why Low-Viscosity Matters
Regenerative braking, brake-by-wire, and why electrified vehicles need low-viscosity high-performance fluid.
Service Interval
How Often Should You Change Brake Fluid?
Manufacturer intervals, climate impact, and when symptom-based replacement makes sense.
FAQ
Frequently asked questions
What is DOT 4 LV brake fluid?
DOT 4 LV (Low Viscosity) is a modern DOT 4 grade brake fluid with dramatically reduced kinematic viscosity at low temperatures. Sinolook DOT 4 LV measures 1,000 mm²/s at −40 °C compared to 1,300 mm²/s for standard DOT 4 — enabling faster ABS modulator and ESP valve response in cold-climate operation. It is also marketed as DOT 4+ PLUS, DOT 4 Class 6, or "ABS / ESP brake fluid".
Is DOT 4 LV the same as DOT 4+ PLUS?
Yes — Sinolook DOT 4+ PLUS is our brand name for the DOT 4 LV (low-viscosity) grade. Both names refer to the same product: a low-viscosity DOT 4 hydraulic fluid certified to FMVSS 116 and ISO 4925 Class 4, engineered for modern ABS / ESP / EHB braking systems.
What is the difference between DOT 4 and DOT 4 LV?
Both are ISO 4925 Class 4 brake fluids with similar dry boiling points. The key difference is low-temperature viscosity: standard DOT 4 is around 1,300 mm²/s at −40 °C, while DOT 4 LV is around 1,000 mm²/s — about 23% lower. The lower viscosity translates directly to faster ABS and ESP response in cold weather.
Which vehicles specify DOT 4 LV?
Most modern European and Asian vehicles built since 2010 with ABS / ESP / ESC / VSC stability control specify DOT 4 LV or an equivalent low-viscosity DOT 4 grade. Always check the brake fluid reservoir cap on the master cylinder or the owner's manual for the exact specification.
Can I use DOT 4 LV in a vehicle that originally used DOT 4?
Yes. DOT 4 LV meets all DOT 4 requirements plus the lower viscosity benefit — it is a direct upgrade. Mixing with existing DOT 4 in the reservoir is also safe; no system flush required.
Can I mix Sinolook DOT 4 LV with other glycol-ether brake fluids?
Yes. Sinolook DOT 4 LV is fully compatible with all other glycol-ether based brake fluids — DOT 3, DOT 4, DOT 4+, DOT 4 LV, DOT 5.1, HZY6 and Class 7 — from any manufacturer meeting FMVSS 116 or ISO 4925. It must never be mixed with DOT 5 silicone brake fluid, which is chemically incompatible and will damage seals.
What standards does Sinolook DOT 4 LV meet?
Sinolook DOT 4 LV brake fluid is certified to four major international standards:
• US FMVSS 116
• ISO 4925:2020 — Class 4
• SAE J1703
• GB 12981 HZY4 — China national standard
Independent test reports are issued by ABIC Testing Laboratories, Inc. in Fairfield, New Jersey, USA. Manufacturing operates under IATF 16949:2016 and ISO 9001:2015 quality systems.
• US FMVSS 116
• ISO 4925:2020 — Class 4
• SAE J1703
• GB 12981 HZY4 — China national standard
Independent test reports are issued by ABIC Testing Laboratories, Inc. in Fairfield, New Jersey, USA. Manufacturing operates under IATF 16949:2016 and ISO 9001:2015 quality systems.
What is the shelf life of unopened DOT 4 LV?
Sealed Sinolook DOT 4 LV has a shelf life of 24 months from the production date when stored in original containers, away from direct sunlight, at 5 – 30 °C. Once opened, glycol-ether brake fluid begins absorbing atmospheric moisture (hygroscopy), which lowers its boiling point — opened containers should be used within 12 months.
What is the minimum order quantity for Sinolook DOT 4 LV?
Standard MOQ is 1 × 20'FCL, approximately 18–20 metric tons depending on packaging configuration. Smaller trial orders may be accepted for OEM and private-label customers. Bulk shipment in flexitank or ISO tank is available for orders 20 tons and above.
Does Sinolook offer OEM and private-label DOT 4 LV?
Yes. Sinolook offers full OEM and private-label service: custom label design, custom bottle and drum colors, custom packaging sizes from 250 ml to 200 L, and bulk supply. Lead time is typically 25 – 35 days from artwork approval. Contact sales@sinolook.com with your label artwork and packaging requirement.
Source DOT 4 LV from a 25-year manufacturer
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