Applications Applications Applications Applications
Lube Additives for Natural Gas Engine Oils (NGEO)
Overview:
Spark-ignited gas engines experience high oxidation and nitration with lean burn conditions; low-ash requirements protect combustion hardware and aftertreatment.
Why an additive package is required:
- Suppress oxidation/nitration to maintain viscosity and prevent varnish on hot surfaces.
- Provide deposit control and ash management to avoid pre-ignition and valve recession.
- Neutralize acids from combustion byproducts; maintain base reserve across extended drains.
Typical additive families employed:
Antioxidants (high-temperature), low-/medium-ash detergents (overbased), ashless dispersants, AW, anti-foam, metal deactivators; gas-engine-specific detergency packages.
Indicative performance tests:
RPVOT (ASTM D2272), TBN/TAN (ASTM D2896/D664), FTIR nitration/oxidation, deposit tests (TEOST), copper corrosion (ASTM D130).
Recommended PX Products
|
Product
|
Function
|
Dosage
|
|---|---|---|
|
PX 3811
|
Oxidation Inhibitor
|
1.0 – 4.0
|
|
PX 3806
|
Premium antioxidant
|
0.05 – 1.0
|
|
PX 3807
|
Premium antioxidant
|
0.05 – 1.0
|
|
PX 3841
|
Anti-foamant
|
0.05 – 0.30
|
|
PX 4005
|
Dispersant
|
2.0 – 10.0
|
|
PX 4006
|
Dispersant + Lubricity
|
2.0 – 10.0
|
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