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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > High Oil Temps And An Effective Solution



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      11-29-2016, 02:40 PM   #1
6IX-F10-N52
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High Oil Temps And An Effective Solution

Hi all, so those of you who have an oil temperature gauge equipped on their vehicle may already know all about the infamous high oil temps modern BMW's have featured simply for fuel economy and emission purposes. for those of you who do not know why, when BMW introduced electric water pumps in their engines N52+ (2006) our oil temps have been completely through the roof. Ideally, your temps should range between 100c (210f) - 110c (230f) . 250f is track temperatures, while anything past that is basically overheating. One effective solution i found worked very well for me was simply removing the plastic engine cover. after doing this, i noted a 50F difference in temps! if you are worried about your engine running hot, here is a great solution that may even work better then an oil cooler. I found another roughly 40f decrease in oil temps when switching from 5w-30 to 5w-40 weight oil.
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      11-29-2016, 02:47 PM   #2
jeddo45
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Originally Posted by 6IX-F10-N52 View Post
Hi all, so those of you who have an oil temperature gauge equipped on their vehicle may already know all about the infamous high oil temps modern BMW's have featured simply for fuel economy and emission purposes. for those of you who do not know why, when BMW introduced electric water pumps in their engines N52+ (2006) our oil temps have been completely through the roof. Ideally, your temps should range between 100c (210f) - 110c (230f) . 250f is track temperatures, while anything past that is basically overheating. One effective solution i found worked very well for me was simply removing the plastic engine cover. after doing this, i noted a 50F difference in temps! if you are worried about your engine running hot, here is a great solution that may even work better then an oil cooler. I found another roughly 40f decrease in oil temps when switching from 5w-30 to 5w-40 weight oil.

My 335i runs around that 250f mark. If I am just on my regular commute, or doing a long road trip the temperature is pretty consistent. I'm not worried about it too much.

Also, I talked to a BMW tech, and I was told that BMW's come with oil coolers from the factory, someone could correct me if I am wrong.
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      11-29-2016, 02:54 PM   #3
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Originally Posted by jeddo45 View Post
Also, I talked to a BMW tech, and I was told that BMW's come with oil coolers from the factory, someone could correct me if I am wrong.
Early models did not.
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      11-29-2016, 02:56 PM   #4
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Originally Posted by GottWhat View Post
Early models did not.
Thanks for the correction. With that being said, I've never been worried about my engine oil running hot.

I also use Motul 5w-40 which is a huge upgrade from the Castrol crap I used to use...
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      11-29-2016, 03:13 PM   #5
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Originally Posted by jeddo45 View Post
Thanks for the correction. With that being said, I've never been worried about my engine oil running hot.

I also use Motul 5w-40 which is a huge upgrade from the Castrol crap I used to use...
250f steady during a simple commute is too high. those are track temps man!

and about motul, really? i mean, i always liked castrol and while its not the best out there, its certainly better then mobil 1 and what not. can you shed some information on motul and what you didnt like about castrol? thanks alot!
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      11-29-2016, 03:28 PM   #6
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Turbocharged cars always run hotter oil temps than naturally aspirated engines. 230-250 is normal. If you have the PPK with an additional external oil cooler or have the 335is the oil temps are usually 20-30 degrees lower and cool at a faster rate.
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      11-29-2016, 03:36 PM   #7
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2010 335i  [5.00]
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Getting an oil cooler would be the obvious choice. My oil temps don't go past 230 degrees. Mine is a 2010 335i and it did not come stock with an oil cooler... Liqui-Moly oil here .
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      11-29-2016, 03:39 PM   #8
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Quote:
Originally Posted by Gohan335i7 View Post
Getting an oil cooler would be the obvious choice. My oil temps don't go past 230 degrees. Mine is a 2010 335i and it did not come stock with an oil cooler... Liqui-Moly oil here .
if anyone is concerned about these ridiculous temps, why install an oil cooler when you can remove the plastic engine cover for free and bring your temps exactly to where they should be?
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      11-29-2016, 03:40 PM   #9
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Quote:
Originally Posted by rsyed07 View Post
Turbocharged cars always run hotter oil temps than naturally aspirated engines. 230-250 is normal. If you have the PPK with an additional external oil cooler or have the 335is the oil temps are usually 20-30 degrees lower and cool at a faster rate.
i heard of people not recommended thicker oil weights for turbo engines. (5w-40) what do you think of this? i believe with turbo engines running hotter, and putting more stress onto the engine under load, thicker oil would be good for your bearings no?
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      11-29-2016, 03:47 PM   #10
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Quote:
Originally Posted by 6IX-F10-N52 View Post
250f steady during a simple commute is too high. those are track temps man!

and about motul, really? i mean, i always liked castrol and while its not the best out there, its certainly better then mobil 1 and what not. can you shed some information on motul and what you didnt like about castrol? thanks alot!
I'm averaging out my temperature. My daily commute, is actually a little bit lower.

As far as Castrol, I find that it just burned way too fast for my taste, even more so on my 335i. We currently have 3 BMW's in the family. They all burned Castrol quicker than we liked. My BMW Indy highly recommended Motul or Mobil 1. He also despises Castrol. Apparently BMW doesn't like them anymore because they ditched them from what I hear!

I switched to Motul and I haven't needed to top off my oil for a long time. I have had to top it off recently, and that is due to a current oil leaked getting addressed as I type
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      11-29-2016, 04:18 PM   #11
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Quote:
Originally Posted by jeddo45 View Post
I'm averaging out my temperature. My daily commute, is actually a little bit lower.

As far as Castrol, I find that it just burned way too fast for my taste, even more so on my 335i. We currently have 3 BMW's in the family. They all burned Castrol quicker than we liked. My BMW Indy highly recommended Motul or Mobil 1. He also despises Castrol. Apparently BMW doesn't like them anymore because they ditched them from what I hear!

I switched to Motul and I haven't needed to top off my oil for a long time. I have had to top it off recently, and that is due to a current oil leaked getting addressed as I type
hmm i see.. mobil 1 is definitely not recommended. even castrol is better quality and offers more protection. I find that no matter what oil you use, your car will never burn a drop of it if you break the car in properly during the initial 3000 miles of the car. no repeated high revs, and keeping the revs under 3-4k for this period will ensure your car is well broken in and burns no oil. I will be switching to motul for my next oil change, should i continue sticking to 5w-40?
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      11-29-2016, 04:36 PM   #12
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Quote:
Originally Posted by 6IX-F10-N52 View Post
hmm i see.. mobil 1 is definitely not recommended. even castrol is better quality and offers more protection. I find that no matter what oil you use, your car will never burn a drop of it if you break the car in properly during the initial 3000 miles of the car. no repeated high revs, and keeping the revs under 3-4k for this period will ensure your car is well broken in and burns no oil. I will be switching to motul for my next oil change, should i continue sticking to 5w-40?
If I am not mistaken, it only comes in 5w-40. If you're not comfortable with it, don't! But I did my own research as well as talk to my Indy about it. He's been dealing with these cars for more than 2 decades so I do trust him. I have been pleased with the oil thus far.
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      11-29-2016, 05:29 PM   #13
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Pennzoil recommends Pennzoil Platinum Euro SAE 5W-40 Full Synthetic Motor Oil or 5W-30 for my car (2008 335i) but the 5W-40 is recommended higher. I am going to give it a go with my next oil change.

PS: I used Motul oil exclusively in the last two motorcycles I owned (Aprilia) with no complaints.
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      11-29-2016, 05:34 PM   #14
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My 335i sits around 220F at highway speeds in 115F ambient temperature. I have the factory oil cooler and use 0w-40 LiquiMoly. Only once have I seen it above 240F
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      11-29-2016, 06:03 PM   #15
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Originally Posted by Mr. Tasty View Post
My 335i sits around 220F at highway speeds in 115F ambient temperature. I have the factory oil cooler and use 0w-40 LiquiMoly. Only once have I seen it above 240F
thats exactly where your temps should be, nice. im at roughly 100c at highway speeds with the engine cover removed. if you dont have an oil cooler from the factory, removing the plastic engine cover is all you need.
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      11-29-2016, 06:05 PM   #16
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Quote:
Originally Posted by jeddo45 View Post
If I am not mistaken, it only comes in 5w-40. If you're not comfortable with it, don't! But I did my own research as well as talk to my Indy about it. He's been dealing with these cars for more than 2 decades so I do trust him. I have been pleased with the oil thus far.
glad to hear you guys are putting 5w30 and 40 into your cars.. as you all should be. i recently switched to 5w-40 with my previous oil change and the car seems really happy with thicker oil. will be switching to motul for my next oil change.
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      11-30-2016, 03:12 AM   #17
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Originally Posted by 6IX-F10-N52 View Post
glad to hear you guys are putting 5w30 and 40 into your cars.. as you all should be. i recently switched to 5w-40 with my previous oil change and the car seems really happy with thicker oil. will be switching to motul for my next oil change.
Car smiles more, huh?
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      11-30-2016, 02:29 PM   #18
6IX-F10-N52
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Car smiles more, huh?
that sinister f10 smile is more pronounced then ever. it looks ecstatic when pouring 5w40 into it and more eager to molest the pavement then ever.

on a serious note, the 5w-40 does fill the bearings better. it pulls to high revs smoother and makes the engine run quieter overall.
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