Super Gas Engine Oil Plus LA/MA 40


PSO SUPER GAS ENGINE OIL PLUS LA & MA are super-premium quality gas engine oils. They meet the requirements of natural gas operated and dual-fuel gas engine applications. They are blended with hydrocracked super refined group III base stocks to provide the highest level of oxidation stability and long service life. The oils have been formulated to deliver excellent performance in natural gas engines operating on a wide range of gaseous fuels (natural, field or landfill gas).

PSO SUPER GAS ENGINE OIL PLUS LA & MA have been developed primarily to meet emerging requirements of major OEMs of gas engines like Caterpillar, Waukesha and Jenbachar to use a Low as well as Medium Ash lubricants with extended drain interval.


  • PSO SUPER GAS ENGINE OIL PLUS LA & MA are designed for spark-ignited gas engines fuelled by natural gas and dual-fuel gas engines ignited by diesel pilot fuel.
  • PSO SUPER GAS ENGINE OIL PLUS LA & MA meet/exceed the requirements of the following OEMs.
    1. Waukesha
    2. Jenbacher
    3. MWM Deutz
    4. Caterpillar
    5. Wartsila


  • Provides excellent resistance to oxidation and nitration by neutralizing the acid formation. Also protects bearing corrosion thus giving reduction in overall maintenance cost.
  • A balanced sulphated ash level optimises valve surface lubrication and reduces valve seat recession. A balanced sulphated ash level also avoids spark plug fouling thus enhances the life of valves and spark plugs.
  • TBN value is optimised to neutralize corrosive acids formation during dry and hot combustion thus enhances engine components down time.
  • An advanced component additive technology comprises of selected detergent/dispersant components to give exceptional cleanliness to piston and engine for maximizing service life.

Performance Standards


Typical Key Properties:

PSO Super Gas Engine Oil PLUS 30 40 30 40
Kinematic Viscosity cSt 40°C
cSt (ASTM D-445)
10.8 14.3 10.8 14.4
Viscosity Index
(ASTM D-2270)
96 155 96 157
Flash Point, COC, °C
220 224 220 224
Pour Point,
-6 -18 -6 -18
Kinematic Viscosity cSt 40°C,
(ASTM D-445)
93 145 136 130
TBN, mgKOH/g
ASTM D-2896
6.3 4.3 9.2 8.4
Sulphated Ash, wt%
ASTM D-874
0.5 0.5 0.9 0.9

These typical results are of existing production, the future production will conform to PSO blending specifications hence any variation in these results will not affect the product performance.