- Lubrication of LPG Engine
– LPG engines employ, with minor differences, a similar lubrication system to those of gasoline or diesel engines
– Using generic gasoline engine oil is permissible under normal operating conditions.
However, under severe operating conditions involving extreme loads, the viscosity of engine oil increases. Causing bearings to wear out at an accelerated pace
- Performance Requirements Applicable to LPG Engine Oil
– Excellent oxidative stability at high temperatures, in particular anti-NOx oxidative stability
– Prevent valve wear and tear
– Prevent deposition in the combustion chamber/spark plug/piston
– Wear-resistance/ant-scuffing performance
– Adequate ash content.
(Reference) Required Performance of Engine Oil per Vehicle Type
| Vehicle | Gasoline-fired | Diesel-fired | LPG- fired |
| Fuel | Gasoline | Diesel | LPG |
| Combustion temperature (thermal- resistance required) | 100°C | High (compared to gasoline) | High (compared to gasoline) |
| NOx amount (anti-NOx oxidative stability) | Low | High | High |
| Soot amount (detergent/dispersant required) | Low | High | Almost none |
| Sulfur content (acid-neutralization) | Low | High (low in recent models) | Almost none |
Note: * Peak flame temperature is higher than 500 ~700°C