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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 12-12-2014, 02:27 AM   #1
JB86'd
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N/A typical oil temps

I've read the threads on oil temp and watched @Dezoris oil pressure video. He mentions 0w-20 being fine for street and autox on an N/A car, but the limits being around 225-235 F.

My car is pretty much stock minus an OFT tune, running TGMO 0w-20. The other night it was about 70 F out, and I did a few runs to redline 1st-3rd gear, datalogging with OFT. I saw oil temps as high as 235, and during autox before my tune I've seen as high as 244 oil temp on 85-95 F days at autox.
Just cruising on the freeway I see up to 219 regularly.

I understand an oil cooler isn't really necessary for street/autox, but are these temps consistent with what you guys are experiencing?
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Old 12-12-2014, 02:38 AM   #2
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with ambient temp being around 70-80 here i see my average oil temp DD my car at 195-215. done 2 track events with ambient temps being 55-70 the average was 220 all the way up for 250 but no more then that. not sure if this is a problem or no but this was my experience.
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Old 12-12-2014, 02:46 AM   #3
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Yes.

125-135C without Cusco oil cooler.
110-120C with Cusco oil cooler.

Both are peak temps at track events, ranging from 50-100F ambient.

UOA shows normal "wear" on the oil, nothing different than normal driving..

-alex
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Old 12-12-2014, 03:25 AM   #4
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Koyo rad, vented hood and JR NA oil cooler. My oil temps rather low with 5w30 in winter, it barely gets to 100C during my 15 minute commute. It will stay around 85C at night when I go out for food or groceries. Going back to 0w20 on the next oil change..


As for track temps, here's two data points with Motul 300V 0w20:
BRP 13CW / No Oil Cooler / Ambient 76F Hi / => Oil Temp 270F Hi
BRP 13CW / JR NA Oil Cooler / Ambient 97F Hi / => Oil Temp 228F Hi

I've seen guys with no cooling mods log oil temps of up to 280F at the track.
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Old 12-12-2014, 07:45 AM   #5
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My car is modded and has a catted UEL on, so YMMV

Without oil cooler I was getting temps up to 130ish C at the track, after installing the maximal performance oil cooler my oil temp never got past 115C at the track where my car never fell below 5K RPM's during the 20 min sessions.

Street driving my oil temp was often passing 100C with Toyota 0w-20. after the oil cooler oil temp stays a cool 86C during street driving.

My average ambient temps are usually mid 80's to mid 90's F year round.
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Old 12-12-2014, 11:13 PM   #6
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Quote:
Originally Posted by JB86'd View Post
I've read the threads on oil temp and watched @Dezoris oil pressure video. He mentions 0w-20 being fine for street and autox on an N/A car, but the limits being around 225-235 F.

My car is pretty much stock minus an OFT tune, running TGMO 0w-20. The other night it was about 70 F out, and I did a few runs to redline 1st-3rd gear, datalogging with OFT. I saw oil temps as high as 235, and during autox before my tune I've seen as high as 244 oil temp on 85-95 F days at autox.
Just cruising on the freeway I see up to 219 regularly.

I understand an oil cooler isn't really necessary for street/autox, but are these temps consistent with what you guys are experiencing?
Randomly hitting the 220-235 range on 0w20 is no big deal its if you are not on a redline rampage and exceeding those temps. Its not the temps as much as the pressure loss long term you have to worry about.
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Old 12-12-2014, 11:26 PM   #7
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Quote:
Originally Posted by Dezoris View Post
Randomly hitting the 220-235 range on 0w20 is no big deal its if you are not on a redline rampage and exceeding those temps. Its not the temps as much as the pressure loss long term you have to worry about.

Thank you kind sir for the response and all your research and videos! good stuff.
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Old 12-15-2014, 04:45 AM   #8
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If you have an air cooler it's possible you'll get a pressure drop as dezoris has mentioned elsewhere i think. So you trade some pressure for temp.
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Old 12-15-2014, 04:45 PM   #9
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I saw temps of 268F+ on a 72F track day with no oil cooler.
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Old 12-15-2014, 05:17 PM   #10
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I miss my old RSX-S with Koyo Radiator that only reaches 175 -185 F all time
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Old 12-15-2014, 05:38 PM   #11
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What kind of pressure drop are you talking about?

Elemen Tuning uses an oil cooler along with other mods to keep the temps down, which helps keep his oil pressures UP.

I just bought an oil cooler that I want to mount in the passenger side driving light area (removing the light) which is about as far away from the oil filter and sandwich plate as you can get. I'm wondering what kind of pressure losses I can expect.



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If you have an air cooler it's possible you'll get a pressure drop as dezoris has mentioned elsewhere i think. So you trade some pressure for temp.
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Old 12-15-2014, 06:14 PM   #12
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Originally Posted by mike the snake View Post
What kind of pressure drop are you talking about?

Elemen Tuning uses an oil cooler along with other mods to keep the temps down, which helps keep his oil pressures UP.

I just bought an oil cooler that I want to mount in the passenger side driving light area (removing the light) which is about as far away from the oil filter and sandwich plate as you can get. I'm wondering what kind of pressure losses I can expect.
From everything I've read from Phil at Element Tuning and others, while you may in theory lose some pressure due to the extra distance oil travels out to the oil cooler you will more than make up for the pressure difference by having thicker, cooler oil, especially on track.

What I mean by this is say that we have two cars, one with an radiator based oil cooler and one without. If the oil temps in both cars are the same the car with the oil cooler will probably have slightly less pressure than the one without due to the longer distance the oil has to travel. However, on the track the car without the oil cooler will run much hotter (I've seen over 50F difference in my own testing) and will end up having significantly less pressure than the car with a cooler due to the hotter oil being thinner.
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Old 12-16-2014, 12:27 AM   #13
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That's the conclusion I came to as well.

I see oil coolers on street applications where the temps are actually too low (in the 170-180 range). Oil needs to be 200-220 to be effective. It is what the weights are rated at. Too cool=too thick, too hot =too thin.

IMO the goal is to have oil temps at 200-220. A little hotter occasionally is just fine.

Constant driving with oil temps too cool is worse than the oil getting a bit hot every once i a while IMO.

Conclusion is most cars can do fine without an oil cooler, but if you drive hard, or track, and cause oil temps to go high fairly often, then an oil cooler can help.

I plan to instal my oi cooler, and for street driving I'll cover the cooler to keep the temps up above 200, and uncover when tracking or hard driving, and time temps go over 230-240.
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Old 12-16-2014, 12:42 AM   #14
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Sounds like this simple mod is perfect for a DD that gets fun occasionally but doesn't do any serious racing. Far lower peaks, only slightly lower when not pushing it.

http://www.ft86club.com/forums/showthread.php?t=72961
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