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Old 09-30-2005, 07:46 PM   #1
txl146
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Default what's normal oil temperature for WRX?

Just installed oil gauge on my WRX. It's reading at 150C+ after driving for about 10 minutes. What's normal oil temperature for WRX?

Gauge is 3 gauge pack from Subaru. Its maximum reading is just 150C.
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Old 09-30-2005, 07:59 PM   #2
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that sounds like it is waaaay too hot, normal oil temps are around 210-220F or so, and around 240ish with hard driving, if i remember correctly. also 150C would be much hotter than that, so it is a possibility that your temp sender could be fubared or maybe something else?
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Old 09-30-2005, 09:06 PM   #3
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Yeah, that's way too hot. Even on an extremely hot day, driving the car hard, I can barely get above 100 C on my factory oil temp gauge.
I did have many problems with erratic readings and low readings on the factory gauge. I ended up having to replace the sensor ($150 - Ouch!) You may need to do the same.
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Old 10-01-2005, 12:00 AM   #4
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Under regular driving conditions I am seeing temps in the range of 96-98C and going up to 100-102C on hot days. I have seen it as high as 114C but that was during a auto-x, lapping in 40C+ weather and 20W50 racing oil.
150C is way too high. If you can, check the voltage etc from the sensor with a multi-meter or try to see what voltage the ECU is getting from the sensor.
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Old 10-01-2005, 12:34 AM   #5
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When I installed the sensor, the connector was soaked in oil. Not sure if it has anything to do with such high reading... I will try to clean it up and reinstalling it.
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Old 10-01-2005, 09:06 PM   #6
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Quote:
Originally Posted by fuzzy13
...or try to see what voltage the ECU is getting from the sensor.
The ECU has nothing to do with this sensor.
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Old 10-01-2005, 09:08 PM   #7
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Quote:
Originally Posted by txl146
When I installed the sensor, the connector was soaked in oil. Not sure if it has anything to do with such high reading... I will try to clean it up and reinstalling it.
Good idea, but I'm not sure it will make a difference. When I was getting low readings, I thought the oil might be acting as an insulator. Try come electrical contact cleaner on the swivel part of the sensor where it enters the threaded plug.
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Old 10-01-2005, 11:13 PM   #8
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whoa!! 150C is way too hot...mines around 95C. creeping slightly above 100C during hard driving. The wheather here is 33-34C daily.
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Old 10-01-2005, 11:26 PM   #9
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With regular Mobil 5/10W-30, the oil will fall apart at 115C. At those temps recing oil is needed and it needs to be changed alot. Think weekly. Above 130C is too hot period. I suspect the guage is broken.

You want to keep it 90C-100C.
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Old 10-02-2005, 03:25 AM   #10
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Quote:
Originally Posted by ebeck
With regular Mobil 5/10W-30, the oil will fall apart at 115C. At those temps recing oil is needed and it needs to be changed alot. Think weekly. Above 130C is too hot period.
Vettes run 240F+ under normal operating conditions, and close to 300F when racing. That's 115C normal and 130C+ racing. They come stock with M1, so I doubt that M1 "falls apart" at those kinds of temps, otherwise they would be spinning rods quite frequently.

Corvette Forum - Oil temps at the track?

Those temps are much higher than the temps in your typical WRX, though, as posted above.
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Old 03-15-2007, 03:01 PM   #11
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hey guys I was running a circuit track and few min into it my oil temp is 250F.....could someone tell me how high I need to stop racing and how high I need to get oil cooler? thanks, I have vf34, full exhaust, FMIC
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Old 03-15-2007, 03:17 PM   #12
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Quote:
Originally Posted by okaythen View Post
hey guys I was running a circuit track and few min into it my oil temp is 250F.....could someone tell me how high I need to stop racing and how high I need to get oil cooler? thanks, I have vf34, full exhaust, FMIC
Go to the electrical forum and read the gauge FAQ.
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Old 03-15-2007, 03:17 PM   #13
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I had the oem gauge pack and sometimes I would get high readings like that, cleaned the connection and that tok care of it. Now I have a Defi/STI Genome pack, commuting I seee between 82-88 Celsius, y-day at WSIR I had +112C max on a +28C ambient temp with M1 oil and a 25%/75% antifreeze/didtilled water mix and a bottle of water wetter.
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