15W-40 Diesel & Petrol Engine Oil Formulation
By Lubechem Consultant – Your Complete Formulation & Manufacturing Partner
At Lubechem Consultant, we offer end-to-end formulation and production guidance for 15W-40 multigrade engine oil, suitable for both diesel and petrol engines. This high-performance engine oil formulation complies with key API service classifications like API CH-4, CI-4, SL, and SN, making it ideal for commercial fleets, trucks, agricultural machinery, and passenger cars operating under tropical or mixed climate conditions.
Production & Manufacturing Process of 15W-40 Engine Oil
Our team assists you through every phase of the 15W-40 engine oil manufacturing process, ensuring optimal performance, cost-efficiency, and API compliance.
Step-by-step process includes:
Selection of Base Oils:
High-quality Group I/II base oils or SN500/SN150/recycled base oils.
Blending ratio tailored to desired viscosity and budget.
Additive Package Integration:
Advanced detergents, dispersants, and anti-wear additives (ZDDP).
Use of viscosity index improvers (OCP/PIB-based) and pour point depressants.
Overbased calcium sulfonates and anti-foam agents for enhanced performance.
Blending Technology:
Hot blending process between 60–70°C using a high-shear mixer or in-line blender.
Ensuring homogeneous dispersion of additives and stability.
Filtration & Settling:
Multiple-stage filtration (25–5 micron) to remove impurities.
Settling tank use to separate unwanted particulates.
Quality Testing & Adjustment:
In-house lab testing for viscosity, TBN, flash point, and foaming.
Adjusting additive dosage to match API CH-4/CI-4/SN/SL standards.
Packaging & Storage:
Suitable for packaging in barrels, pails, and HDPE containers.
Compliance with lubricant shelf-life and safety protocols.
Technical Specifications – 15W-40 Engine Oil
| Parameter | Typical Range | Test Method |
|---|---|---|
| API Performance Level | CH-4, CI-4, SL, SN | API Classification |
| Viscosity @ 40°C (cSt) | 95 – 125 | ASTM D445 |
| Viscosity @ 100°C (cSt) | 13.5 – 15.5 | ASTM D445 |
| Viscosity Index (VI) | 130 – 145 | ASTM D2270 |
| Flash Point (°C) | 220 – 240 | ASTM D92 |
| Pour Point (°C) | -21 to -27 | ASTM D97 |
| TBN (mg KOH/g) | 8 – 12 | ASTM D2896 |
| Density @ 15°C (g/cm³) | 0.870 – 0.890 | ASTM D4052 |
| Sulphated Ash (% wt) | 1.0 – 1.4 | ASTM D874 |
| Noack Volatility (%) | ≤ 12 | ASTM D5800 |
| Copper Strip Corrosion | 1A | ASTM D130 |
| Foaming Characteristics | Pass (Seq. I, II, III) | ASTM D892 |
| Color | L 3.0 max | ASTM D1500 |
Why Choose Our 15W-40 Engine Oil Formulation?
✔ All-Season, Multigrade Protection Designed to perform in both hot and cold climates—perfect for all-weather applications.
✔ High TBN & Wear Protection Ideal for high-load diesel engines requiring strong acid neutralization and soot dispersion.
✔ Custom Formulation Options Formulated using recycled, virgin, or mixed base oils to meet your budget and market.
✔ Meets International Standards Tailored to meet or exceed API CH-4/CI-4/SL/SN requirements.
✔ Full Technical Guidance From ingredient sourcing to blending method and lab testing support, we provide expert help.