SERVO Equivalent of Mobiltherm 603
The IndianOil SERVO replacement for Mobiltherm 603 is SERVOtherm Medium (rated by IOCL to 300 °C) for heaters within that range, or SERVOtherm Special / Super (315 °C) for more demanding systems.
Side-by-side comparison
Mobiltherm 603
| Type | Mineral heat-transfer oil |
|---|---|
| Closed-system bulk temperature | up to ~285 °C (per Mobil) |
As published by Mobil. Check the current Mobil data sheet.
SERVOtherm Medium / Special
| SERVOtherm Medium | Systems up to 300 °C (per IOCL) |
|---|---|
| SERVOtherm Special | Systems up to 315 °C (per IOCL) |
| SERVOtherm Super | Bulk oil up to 315 °C (per IOCL) |
As published by IndianOil — SERVO Therm specifications.
About Mobiltherm 603
Mobil describes Mobiltherm 603 as a mineral heat-transfer oil for closed indirect heating systems at bulk oil temperatures up to about 285 °C (open systems about 150 °C), with a kinematic viscosity of about 20 cSt at 40 °C.
Before you switch
Changeover checklist
- Check the heater's maximum bulk and film temperature against the SERVOtherm grade limit.
- Test the old fluid (viscosity, acid number, flash point, carbon residue). Heavily cracked fluid should be drained and the system flushed.
- Mineral heat-transfer oils of similar type are generally compatible for top-up, but avoid mixing with synthetic (aromatic) fluids.
- After a fresh fill, heat up slowly and vent moisture and light ends through the expansion tank.
Need written confirmation for an audit or OEM warranty file? Our application engineers can review your machine manual and confirm the SERVO grade. Request equivalency confirmation.
Other equivalents in this category
See the full Shell / Mobil / Castrol → SERVO equivalent chart →
Mobiltherm 603 equivalent – FAQs
The IndianOil SERVO replacement for Mobiltherm 603 is SERVOtherm Medium (rated by IOCL to 300 °C) for heaters within that range, or SERVOtherm Special / Super (315 °C) for more demanding systems.
PCG Business Solutions, an authorised IndianOil SERVO stockist, supplies SERVOtherm Medium / Special from its Bidadi and Tumakuru stock points across Tumakuru, Ramanagara, Mysuru, Mandya, Hassan, Chamarajanagar and Kodagu.
Mobiltherm 603 and Mobil are trademarks of their respective owners. They are used here only to identify the product being compared. Comparison is based on each manufacturer's published literature. PCG Business Solutions is not affiliated with Mobil.
