There could be several reasons for a significant oil pressure difference in gas engines:

1. EXCESSIVE CRANKCASE OIL

Having too much oil in the crankcase raises oil temperatures, lowers viscosity, increases the likelihood of oil leaks, and subsequently raises oil pressure.

2. POOR CRANKCASE VENTILATION

The oil pressure and temperature in the crankcase are influenced by airflow. Inadequate ventilation in the crankcase can elevate oil pressure.

3. LOW OIL LEVEL IN SUMP

Insufficient oil in the sump prevents the oil pump from drawing in enough oil, leading to decreased oil pressure.

4. LUBRICATION SYSTEM MALFUNCTION

Any malfunction in the lubrication system can result in increased oil pressure, affecting normal engine operation.

5. EXCESSIVE BEARING CLEARANCE

Excessive bearing clearance tends to cause oil leaks and can also impact oil pressure.

6. COOLING SYSTEM MALFUNCTION

Engine cooling system malfunctions cause high engine temperatures, reduced oil viscosity, increased oil leakage, and subsequently affect oil pressure.

7. SEVERE PISTON RING WEAR

Extensive piston ring wear reduces engine compression, lowers engine power, increases oil leakage, and consequently affects oil pressure.

8. FUEL SYSTEM MALFUNCTION

Issues with the fuel system can hinder the proper functioning of the engine, affecting oil pressure.

9. SENSOR MALFUNCTION

Sensor malfunctions can disrupt the engine control system, influencing oil pressure.

10.ENGINE CONTROL MODULE(ECM)MALFUNCTION

A malfunctioning ECM can prevent the engine from functioning correctly, affecting oil pressure.

In conclusion, high oil pressure differences in gas engines can result from various causes. To ensure the engine's proper operation, it's essential to perform regular checks and maintenance, promptly identifying and addressing any potential issues.