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Old 12-08-2008, 11:39 PM   #1
Scooby Newbie
Member#: 165725
Join Date: Dec 2007
Chapter/Region: TXIC
Location: Mission Tx
06 Subaru STI

Default Help: Oil Pressure at 0 using a Sandwich Adapter and Prosport Gauge

Moving this to the proper Thread!

I'm hoping to get some useful information from the NASIOC crew.

I've been using synthetic Mobile 1 since the first oil change on my 2006 STI. It has AP Stage 2 with an Invidia V3 catless down pipe and stock catback exhaust. I have a Prosport Oil Pressure Gauge with a Sandwich adapter and I don't recall where I purchased it. Either way I had my oil changed at the dealer over the T-Giving weekend and noticed this past Saturday that my oil pressure gauge was at 0 when at idle. When I would accelerate the pressure would increase but no more than 60. In the past it would operate at 30 when at idle and over 90 when accelerating.

I looked at the receipt and found that the dealer did my oil change but used regular castrol 5/30. They didn't use synthetic mobile 1. The change of oil from synthetic to regular is the only variable that has changed and my oil pressure has dropped significantly. I don't see any red oil lights from the vehicle and the motor has never knocked when at idle.

Either way I stopped driving it until today when the dealer asked to bring it and make it right by using synthetic. They don't think that my gauge is working properly because if it was 0 pressure the oil light should be on and the car should knock.

I drove the car home and running at about 70MPH the gauge was worse, it showed 0 pressure no matter what RPM and speed I was at. At this point I'm out of ideas.

Does anyone know if there is a way to determine whether or not my oil pump is working fine and that I have a bad sandwich adapter? I don't mind ordering one, but I would have to do another oil change to swap it out. Any ideas are appreciated. Many thanks to those of you who reply with assistance.
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Last edited by dculberson; 12-08-2008 at 11:46 PM.
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Old 12-09-2008, 04:46 AM   #2
Scooby Specialist
Member#: 142447
Join Date: Mar 2007
Chapter/Region: AKIC
Location: Not so Fair...banks
2017 Limited STI WRB
06 Outback 3.0R


Why is this in the pre-2002 factory turbo power train section again? More than likely your oil pressure sensor is borked. I'm having some issues with my pro-sport oil pressure gauge as well, have you contacted them yet to see what pro-sport has to say?
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