Lubricant making
Base stock for automotive, industrial and marine lubricant formulations.
Re-refined base oil
Consistent base oil, batch after batch.
A raw material for lubricants, greases and industrial fluids, produced under controlled conditions and supported by a Certificate of Analysis for each batch.
Technical specifications · Rev 0.1 · 02 Nov 2026
Re-Refined Base Oil (RRBO)
Proposed base-oil technical data by viscosity grade. Bulk supply / blending use.
A. Viscosity-grade quality targets
| PROPERTY | SN70 | SN150 | SN350 | SN500 | ASTM |
|---|---|---|---|---|---|
| Appearance | Clear / bright | Clear / bright | Clear / bright | Clear / bright | Visual |
| Colour, ASTM, max | 1.5 | 1.5 | 2.0 | 2.5 | D1500 |
| Density @ 15 °C, kg/L | 0.845-0.860 | 0.855-0.870 | 0.865-0.880 | 0.875-0.890 | D4052 |
| KV @ 40 °C, mm²/s | 10-15 | 28-35 | 60-75 | 90-110 | D445 |
| KV @ 100 °C, mm²/s | 2.5-3.5 | 5.0-6.0 | 8.5-10.5 | 10.5-12.5 | D445 |
| Viscosity index, min | 95 | 95 | 95 | 95 | D2270 |
| Flash point COC, °C, min | 180 | 210 | 220 | 230 | D92 |
| Pour point, °C, max | -6 | -6 | -6 | -6 | D97 |
| Water, % m/m, max | 0.05 | 0.05 | 0.05 | 0.05 | D6304 |
| TAN, mg KOH/g, max | 0.05 | 0.05 | 0.05 | 0.05 | D664 |
| Total sulphur, % m/m, max | 0.10 | 0.10 | 0.10 | 0.10 | D4294 |
| Ash, % m/m, max | 0.01 | 0.01 | 0.01 | 0.01 | D482 |
B. Release / market classification
QUALITY PRIORITY Premium process-improvement goal: TAN ≤0.03 mg KOH/g and lighter colour where commercially achievable. Existing grade specifications above retain the earlier ≤0.05 TAN acceptance level until validation.
BASE-OIL GROUP Do not label Group II solely on colour, viscosity or VI. Group II additionally requires saturates ≥90%, sulphur ≤0.03% and VI 80 to <120 under API base-stock definitions; test the relevant parameters before claiming any Group classification.
CUSTOMER RELEASE Confirm grade using a representative batch COA. Add buyer-specific metals, oxidation stability and odour testing where the application requires it.
REFERENCE BASIS Existing Rerol RRBO Product Specification (July 2026); ASTM base-oil tests; API base-stock classification guidance.
Applications
Built for blenders and industrial fluid makers.
Grade and formulation fit must be confirmed from the latest COA and your own product requirements.
Grease
Base oil input for industrial and automotive grease products.
Hydraulic oils
Raw material for fluids that require controlled viscosity and stability.
Gear oils
Base stock for industrial formulations subject to load and heat.
Industrial fluids
A re-refined input for suitable process and maintenance formulations.
Sample validation
Test a sample in your own blend before confirming a larger supply plan.
COA review
Buy the batch result, not the marketing label.
The applicable grade and standard are confirmed against the latest test report. Rerol does not publish unverified Group II claims.
| Property | Control | Where to verify |
|---|---|---|
| Viscosity index | Recorded for each batch | Shown on the supplied COA |
| Saturates | Recorded for each batch | Shown on the supplied COA |
| Kinematic viscosity | Recorded for each batch | Shown on the supplied COA |
| Sulphur | Recorded for each batch | Shown on the supplied COA |
| Flash point | Recorded for each batch | Shown on the supplied COA |
| Colour | Recorded for each batch | Shown on the supplied COA |
Buyer questions
Three checks before a trial batch.
Consistency matters more than a generic grade name.
Which grade is supplied?
Confirm the applicable grade and review the complete COA for the offered batch.
How repeatable is it?
Compare viscosity, sulphur and other key results across more than one batch.
Can I test it first?
Request a sample for laboratory and blend validation before placing a larger order.
Test it in your own formulation.
Request a sample and the latest COA for technical review.