I had this happen only one time on a 413 equipped car, when I changed the oil by driving the car up on ramps, and letting the oil drain out for a number of hours, as I got side-tracked by another project. The oil pump lost its prime, and therefore I had no pressure. I had to resolve this by removing the pump (luckily it's externally mounted) and packing it with Vaseline,then re-installing it. The gooey vaseline aided the pump in getting an initial re-prime, and all has been right with the world ever since. I no longer wait this long before putting new oil back in, nor do I drive up on ramps to change it. I recommend using a guage, just to be sure of how much/little pressure you have. John -----Original Message----- From: annbarbq@xxxx [mailto:annbarbq@xxxx] Sent: Tuesday, December 02, 2003 6:11 AM To: Chrysler300@xxxxxxxxxxxxxxx Cc: stephen.schieser@xxxx Subject: [Chrysler300] Chrysler 300 Hurst oil pressure I have a 300 Hurst with 77,044 miles on it. Drove it about 10 miles then changed the oil. I used 10W30 Valvoline oil and Ford Motorcraft FL-1A oil filter, the equivalent of Fram PH8A oil filter. Oil filter removed was FRAM PH8A. After changing the oil, the oil pressure light stayed on ( no oil pressure gauge on my car ). I replaced the oil pressure sending unit to the oil pressure light, but still the light stays on, so apparently no oil pressure? Any suggestions on resolving this oil pressure problem? I considered removing oil pressure sending unit and installing mechanical oil pressure gauge to confirm no oil pressure. Also I talked to NAPA about a new oil pump - theysell a standard one, a high performance one, and a high performance and high volume. Which one to buy if it turns out to be a failed oil pressure pump?Thank you. Steve in Columbus, Ohio. To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/