Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Engine Oil Pressure



Start the engine and let it run until it reaches the measurement temperature. => Engine temperature: 90°C Measured values (examples)

For a cold start (e.g. 24 °C) pressure immediately jumps to 8 bar briefly (oil-pressure gauge).
Following cold start oil pressure drops briefly to 3 bar (oil-pressure gauge) - 4000 hPa (PIWIS Tester).
For warm-up phase at idle speed pressure drops from 3 bar to 1.8 bar (oil-pressure gauge) - 4000 hPa drops to 2800 hPa (PIWIS Tester).
At engine temperature of 90 °C at idle speed 1.5 bar to 1.6 bar (oil-pressure gauge) - 2600 hPa (PIWIS Tester).
At engine temperature of 90 °C at 1000 rpm 2.8 bar (oil-pressure gauge) - 3800 hPa (PIWIS Tester).
At engine temperature of 90 °C at between 2000 rpm and 4000 rpm the oil pressure is almost constant at 3.0 bar (oil-pressure gauge) - 4000 hPa (PIWIS Tester). The value may fluctuate by 0.1 bar (100 hPa).