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Old 09-23-2010, 11:13 PM   #1
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Engine oil temp

Guys, I'm curious what oil temp those of you with SC's are seeing. Mine seems a bit high, it peaks at 235-240 degrees. The oil is brand new Mobile 1 synthetic 5w30
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Old 09-23-2010, 11:21 PM   #2
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I usually run right over the 200 mark. I would switch to Mobil 1 - 15w50 oil. Thats what LPE, ADM and other shops recommend running, especially in the heat.
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Old 09-23-2010, 11:37 PM   #3
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I usually run right over the 200 mark. I would switch to Mobil 1 - 15w50 oil. Thats what LPE, ADM and other shops recommend running, especially in the heat.
That's where mine was before I installed the SC. I may have to try thicker oil.
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Old 09-23-2010, 11:41 PM   #4
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That's where mine was before I installed the SC. I may have to try thicker oil.
Give it a shot - I run 15w-50 in the summer and 5w-30 when it gets cold here in SD.
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Old 09-24-2010, 12:22 AM   #5
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Guys, I'm curious what oil temp those of you with SC's are seeing. Mine seems a bit high, it peaks at 235-240 degrees. The oil is brand new Mobile 1 synthetic 5w30
how many quarts did you put in, i had the same issue when the dealer put my oil, i think they just put seven and it was running hot, however they recommended 8 quarts this time around and the car is right on the money 210 is constant. also I used the mobil one oil filter, the dealer uses pensky oil fitter.
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Old 09-24-2010, 12:27 AM   #6
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if they make a gauge for it, people will worry about it
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Old 09-24-2010, 02:36 PM   #7
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if they make a gauge for it, people will worry about it
If they make a gauge for it, you need to worry about it.
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Old 09-24-2010, 05:28 PM   #8
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GrinderSS - just wondering what your oil pressure is at idle.
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Old 09-24-2010, 06:58 PM   #9
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GrinderSS - I see you are in Florida, temps about same as here in Texas. Your oil is WATER cooled by the engine oil cooler. So, your oil temp should be about 20 degrees hotter than coolent temp. Make sense? So, on a hot Florida summer day you can get very high temps. I sugest you cool the motor down some by installing a 160 degree stat that will lower coolent and engine oil temps. I am not supercharged, yet. With my 160 stat at highway speed in DFW summer I read close to 190 degrees coolent temp on my DIC and engine oil about 20 degrees higher on my counsel oil temp gauge. This is how it is supposed to operate. Also, if you have headers they pass very close to the oil/water cooler on driver side of car. I wraped my headers in that area to reduce the radiant heat onto the factory cooler. I also run Mobil 1 15-50 all year. Hope this helps.
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Old 09-24-2010, 10:32 PM   #10
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That's where mine was before I installed the SC. I may have to try thicker oil.
I don't understand why thicker oil would yield cooler oil temperatures.
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Old 09-25-2010, 12:46 AM   #11
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GrinderSS - I see you are in Florida, temps about same as here in Texas. Your oil is WATER cooled by the engine oil cooler. So, your oil temp should be about 20 degrees hotter than coolent temp. Make sense? So, on a hot Florida summer day you can get very high temps. I sugest you cool the motor down some by installing a 160 degree stat that will lower coolent and engine oil temps. I am not supercharged, yet. With my 160 stat at highway speed in DFW summer I read close to 190 degrees coolent temp on my DIC and engine oil about 20 degrees higher on my counsel oil temp gauge. This is how it is supposed to operate. Also, if you have headers they pass very close to the oil/water cooler on driver side of car. I wraped my headers in that area to reduce the radiant heat onto the factory cooler. I also run Mobil 1 15-50 all year. Hope this helps.
That makes sense. My water temp hovers around 200, mid day it gets up to 210. So that explains the temps I'm seeing. Thanks!
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Old 09-25-2010, 10:47 AM   #12
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I don't understand why thicker oil would yield cooler oil temperatures.
You are correct, it does not yield cooler temps. But it does coat and protect all moving parts, especially during the hottest months. I just threw that in as a sidenote to those living in hot areas. GM has used the thinner 5 w 30 that gives slightly better mileage. Just my 2 cents.
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Old 09-25-2010, 12:02 PM   #13
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If they make a gauge for it, you need to worry about it.
1SS guys with the same engine don't have a gauge. Maybe the leather makes the oil temp more critical in the 2SS.
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Old 09-25-2010, 02:28 PM   #14
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I usually run right over the 200 mark. I would switch to Mobil 1 - 15w50 oil. Thats what LPE, ADM and other shops recommend running, especially in the heat.


A bit on the other side of the 200 mark is where I sit ... I use 15w50 as well and a 160* stat.
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Old 09-25-2010, 02:41 PM   #15
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A bit on the other side of the 200 mark is where I sit ... I use 15w50 as well and a 160* stat.
I'm at the same point with the same oil and thermostat
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Old 09-25-2010, 02:41 PM   #16
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Quote:
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If they make a gauge for it, you need to worry about it.
kinda like the Trans Temp gauge? when that temp skyrockets, it means your sensor or gauge is bad and it's time to replace it!

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1SS guys with the same engine don't have a gauge. Maybe the leather makes the oil temp more critical in the 2SS.
ohhhhhhhh SNAP!
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Old 09-25-2010, 05:25 PM   #17
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You guys are worried about oil temp as you cruise down the highway in overdrive? At a road course you will see a lot higher than water temp + 20! Add a blower and heavy foot and 290 will come soon enough.

Andy
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Old 09-25-2010, 08:09 PM   #18
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True enough. I'm guessing the guys ripping on gauges don't track their cars or drive them hard enough to realize how much these temps can rise, quickly.

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You guys are worried about oil temp as you cruise down the highway in overdrive? At a road course you will see a lot higher than water temp + 20! Add a blower and heavy foot and 290 will come soon enough.

Andy
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Old 09-28-2010, 05:29 PM   #19
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You guys are worried about oil temp as you cruise down the highway in overdrive? At a road course you will see a lot higher than water temp + 20! Add a blower and heavy foot and 290 will come soon enough.

Andy
I took my car to Miami for an autox event, it was 90 degrees outside and 4 laps in the oil temp was 300+. So I shut it down. I need to find an oil cooling kit I suppose.
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Old 09-28-2010, 05:35 PM   #20
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I took my car to Miami for an autox event, it was 90 degrees outside and 4 laps in the oil temp was 300+. So I shut it down. I need to find an oil cooling kit I suppose.
300 is really high. I hope you replaced your oil right after this event. Temperatures that high really put a hurt to the oil and the additives in it.
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Old 09-28-2010, 05:41 PM   #21
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300 is really high. I hope you replaced your oil right after this event. Temperatures that high really put a hurt to the oil and the additives in it.
The break down temp of the Mobile 1 synthetic is supposed to be over 400 degrees, but I did change the oil immediately after the event.

I'm beginning to wonder if the factory gauge is out of calibration.
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Old 09-28-2010, 06:09 PM   #22
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The break down temp of the Mobile 1 synthetic is supposed to be over 400 degrees, but I did change the oil immediately after the event.

I'm beginning to wonder if the factory gauge is out of calibration.
I would not wish to try that 400 degree oil temp on my engine. I work on a lot of cars that road race, and we don't like to see temps above about 280 degrees if we plan on the engine lasting a weekend. The actual oil temp at the bearing, under pressure, keeping the crankshaft off the bearing, is going to be higher than you are seeing on a gauge.

Where you take the temp, and the calibration of the gauge come into play also, but generally speaking the oil and water temp run hand in hand.

There is a sweet spot for oil and water temps, but the cooler you keep everything, the longer it will last.
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Old 09-28-2010, 08:05 PM   #23
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LS3 motor's run a higher oil temp than the older LS1's. I'm guessing it must be where the oil gallies run.

One of my winter projects is to get rid of the gay water/oil heat exchanger and put on a real oil cooler like the Z06's run.
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Old 09-28-2010, 08:31 PM   #24
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LS3 motor's run a higher oil temp than the older LS1's. I'm guessing it must be where the oil gallies run.

One of my winter projects is to get rid of the gay water/oil heat exchanger and put on a real oil cooler like the Z06's run.
Keep us posted on that project as I'm thinking about doing the same.
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Old 09-28-2010, 08:38 PM   #25
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I would not wish to try that 400 degree oil temp on my engine. I work on a lot of cars that road race, and we don't like to see temps above about 280 degrees if we plan on the engine lasting a weekend. The actual oil temp at the bearing, under pressure, keeping the crankshaft off the bearing, is going to be higher than you are seeing on a gauge.

Where you take the temp, and the calibration of the gauge come into play also, but generally speaking the oil and water temp run hand in hand.

There is a sweet spot for oil and water temps, but the cooler you keep everything, the longer it will last.
That's a very good point...certainly there are hot-spots in the engine where the temps might exceed the oil breakdown point.

I was pushing the car pretty hard and the temp reading was from the analog factory gauge. It could have been < 300, but the needle looked awfully close to the 300 mark.

I noticed after the oil change (used 5w30 Royal Purple) the oil temperature under normal driving conditions seems lower. I haven't tracked it again since.
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