I have an issue with my 2002 Saturn SL1 over 200,000 k.

70 was at 2000 rpms warm engine before

Redid the compression test each came back at 175-180. Psi

Well testing it with the light on is a problem. First the light has not stayed on and on, it only has flashed also It comes on at start up and lasts the longest of all warning lights. Don't I have to have the censer in for the light to come if so how can I have both going. Id have to get under the car install the switch and take it out to put in the oil tester. With hot oil coming from the hole.I'm sure it would have been on if that was the case while I was testing the pressure. Or be running the engine with no pressure with the pressure tester in till the light comes on? Running the engine with out oil pressure is bad and I will end up ruining the engine. I'm not to sure what kinda plugs I just got them at auto value parts. The parts person got them for me. They fit. Lol.

It seam to be running ok.I haven't heard any sounds. I just got new brakes last summer. Fuel may be consuming faster than normal. Seams when the oil light comes on the car looses the get up and go. And feels to me like its gonna over heat but the temp gauge says its ok. It stays at about half way mark. The area where the oxygen censer seams to get super hot fast. I replaced the belt a month ago it seams tight. Other than that only the fan or Heater switch thing is broken. Really only goes on high. Last summer There was a spark and smoked that came from the switch when I turned on the air conditioning. I did have a coolant leak but replaced the water pump last summer and Trouble starting and replaced the starter last summer. Now this. Lol.

If I get the t connector, hook it up what am I looking for. If the pressure drops again. What would that mean. If not what then. Should I give up and bring it into a shop.I brought it in last week to a place when the light first came on. Dropped it off and 3 days later the guy still hadn't look at it. I got the censer and changed it myself and saved 200 bucks. And it wasn't even the problem. Any ideas on what Im looking at the good and bad. Lol.

I THINK I HAVE CHAMPION PLUGS SILVER AND WHITE. BUT THAT WOULDN'T CAUSE LOW OIL PRESSURE WOULD IT. STILL DIDN'T GET THE FUEL FILTER CHANGED OUT BOLTS ARE SEIZED UP ON THE MOUNT. SPRAYED SOME DW40 BUT WONT BUDGE. WOULD DROPPING THE OIL PAN BE THE NEXT STEP.I THINK I NEED SPECIAL TOOLS FOR THAT THAT I DON'T HAVE.

OK ONE MORE TRY. LOL. Ill get a T connector and see if I can get let light on with out killing the engine. And Ill let you know what happens. Thanks.

No luck finding a T fitting or any parts to build one. No places carry metric. Even the hose and fitting place I got the last fitting from can't. It would take a few weeks to order something in.

How can I rule out a electrical problem if I cant get the test with the light to come on. Or what else could I do. Assuming I lose pressure on the gauge when the light comes on while driving at 2000 to 3000 rpms. But can continue to drive. And amusing the pressure doesn't not come back on until I restart the car.

Well after coming to no conclusion. I brought my car into Canadian tire, which it the closest place for me.I told them everything and they lifted it up to see what was going on. They think That I have a leak some where at the back of the engine and also from somewhere in the Timing chain camshaft area. He also said he smells fuel in the oil. He said the cost of repairs are not worth fixing it. So I guess I'm looking for a new car. Not sure where to start with that one. Lol. Thanks fore everything.

He lifted up the front right splash shield a bit and said there is a lot of oil coming from somewhere and said it would be like 900 bucks just to get in a look at that one spot. Then there's a leak at the back of the engine behind the starter. Which he guesses is a head gasket. And then he thinks he smells fuel in the oil and mentioned checking the fuel injectors or something and that maybe to much fuel is getting in. He then said it would not be worth the money to fix it.I don't have a garage I'm doing this on the street in front of my house. Lol. And to remove the crankshaft and what not could get messy. I may park it in the back and wait till the summer and have a project on my hands. The guy didn't charge me which was nice. He just kept telling me how impressed he was with me. Lol.

He didn't really have an explanation for why the light was coming on.