Guys,
On the 93 and earlier Mustangs, the stock oil pressure gauge did give variable oil pressure readings. The stock oil pressure gauge on the 94/95 Mustangs do not. The sender is a switch. It's either on or off just like a lightswitch. There's no debate here as this info is from the Factory shop manual. The gauge will indicate normal if oil pressure is approximately 4.5 PSI or higher (I'd have to pull out my shop manual to confirm the exact PSI) The needle should point to the M in Normal.
If your stock oil pressure gauge needle is low or wandering, then your oil pressure sender is shot or you have a bad ground somewhere.
When I first bought my 95 GT, my oil pressure was wandering around all over the place. I replaced the sender and now it is steady at the M in Normal.
To repeat what Hairy said with regards to your oil pressure gauge, it doesn't matter if your actual oil pressure is 10 PSI or 60 PSI. The stock oil pressure gauge will show the oil pressure around the middle of the normal range.
PS. This topic has been covered MANY times before. I'd recommend anyone who doubts what I've posted either do a search here and on The Corral or buy a Factory shop manual CD ($10 on Ebay) and read for yourself.
On the 93 and earlier Mustangs, the stock oil pressure gauge did give variable oil pressure readings. The stock oil pressure gauge on the 94/95 Mustangs do not. The sender is a switch. It's either on or off just like a lightswitch. There's no debate here as this info is from the Factory shop manual. The gauge will indicate normal if oil pressure is approximately 4.5 PSI or higher (I'd have to pull out my shop manual to confirm the exact PSI) The needle should point to the M in Normal.
If your stock oil pressure gauge needle is low or wandering, then your oil pressure sender is shot or you have a bad ground somewhere.
When I first bought my 95 GT, my oil pressure was wandering around all over the place. I replaced the sender and now it is steady at the M in Normal.
To repeat what Hairy said with regards to your oil pressure gauge, it doesn't matter if your actual oil pressure is 10 PSI or 60 PSI. The stock oil pressure gauge will show the oil pressure around the middle of the normal range.
Your stock oil pressure sender is shot Revhead. Replace it with a new one and you'll see your oil pressure return to the middle of the normal range.
PS. This topic has been covered MANY times before. I'd recommend anyone who doubts what I've posted either do a search here and on The Corral or buy a Factory shop manual CD ($10 on Ebay) and read for yourself.