how many miles on the oil and have you cleaned the strainer? I'd also check the oil pump gears for damage. -----Original Message----- From: Dan Martin <danandkatrinamartin@xxxxxxx> Subj: [tcb] Oil Pressure dropping to Zero after 15 mnutes warm up when I stop? Date: Wed Jun 28, 2006 4:21 pm Size: 1K To: tcb@xxxxxxxxxxxxx From Trey, He used the wrong e mail address ; ) -1600 DP Stock Engine ...16,000 miles on building it. -VDO Oil Pressure gauge and sensor..... When I start the engine , oil pressure is fine but after running for 15 or so minutes when oil temps get up to 200-205 ( oil pressure ok at 40-45 psi ) but when I come up to a light or stop sign the oil pressure drops to 0. Oil light comes on and stays on until the rpm's raise above idle (900 rpm) when I drive off. ???? Then I go on my way and everything seems fine until I stop and the oil lights comes on again. When I first get in the bus the engine is warming up (120 to 180 degess) the first 15 minutes or so when I come to a stop sign at idle the oil pressure is 10-20 psi.... seems fine. Frustrating,,,,,, I replaced the oil pressure relieve and pressure springs and the plugs which increased my oil pressure but after 15 minutes (Oil temps 200-210) the pressure drops to 0. Any ideas? Running Castrol HD 40 wt. It's hot here in Houston but never had the oil pressure ever drop to 0 before like this. Engine was built 2 years ago. No visible oil leaks anywhere. Help.... Trey