Oil Pressure (>2 kg/mm2): Idle (2~3), Cruising (3~5), VTEC (6~6.5)
High oil pressure : ( suddenly increases) Pressure relief valve could be not working.
Low oil pressure: Insufficient oil in engine, leakage, damaged oil pump, and worn out oil.
Oil Temp (<130 degC): Idle (85~90), Cruising (80~90), VTEC (slightly above 100)
High oil Temp: Insufficient oil level, insufficient cooling (if modded), blocked passage, damaged oil pump, bad bearing and worn out oil.
Low oil Temp: Over cooled engine, normally due to oversize oil cooler used.
Water Temp (<110 degC): Idle (85~90), Cruising (80~90), VTEC (slightly below 100)
High water Temp: Thermostat jam, insufficient water, insufficient cooling (if modded), blocked passage, damaged water pump, and worn out coolant (normally water is ok unless heavy mod engine).
Low water Temp: Wrong radiator size causing overcooling or slow heating up.