A6-C5 - (Typ 4B, 1997–2004) 1997–2004

High oil temperature - A6 2.7T

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Old 06-22-2010, 04:05 PM
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Angry Re: High oil temperature - A6 2.7T

F*CK. I thought I had found my problem. WTF, anybody can help please? Oil temp is too high dammit its not normal. **** I opened the trunk and the heat came out of there like a freaking BBQ oven. GUYS PLEASE HELP. Its scary that my temp is UP to 100-110 Celsius every dam day.
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Old 06-22-2010, 04:23 PM
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Default Re: High oil temperature - A6 2.7T

Could it be the OIL TEMP SENSOR that needs to be replaced? The car has 142000 kms.
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Old 06-22-2010, 05:47 PM
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Default Re: High oil temperature - A6 2.7T

I don't find the oil temp in your pic to be alarming at all, I usually run about that temp
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Old 06-23-2010, 06:10 PM
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Default Re: High oil temperature - A6 2.7T

Originally Posted by vghostine
Mobile1 5W30 synthetic oil (which is not FULLY synthetic oil).

Audi Dealer uses CATROL SYNTEC 5W40 FULL SYNTHETIC OIL.
I believe you to have your facts mixed up... Mobil1 is the true, full synthetic oil. Castrol fought U.S. legislation so they could label their partial Synthetic oil as a Full synthetic.


Coincidentaly (?!? spelling?) I found the opposite to be true. I find I'm 10-15 degrees cooler running Mobil, and castrol always runs warmer. BTW - You should be using 0W40 as per your manual. 30 weight oil will slip past your rings and ruin your cats - very $$$$$$.
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Old 06-28-2010, 02:30 PM
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Default Re: High oil temperature - A6 2.7T

100-110 C is PERFECTLY acceptable for most conditions (especially in the summer).

The owner's manual states that the factory oil was 0W-30
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Old 06-28-2010, 04:49 PM
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Default Re: High oil temperature - A6 2.7T

I'll have to take your word on that... I have never owned a turbo. I have a 2.8 30v and a 4.2 40v, both require 0-40.

Interestingly when i first got the 2.8, i changed the oil with 0w30, and lost a full litre in 1000Km! changed it to 0W40 and now it doesnt loose a drop in the last 45,000Km
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Old 06-29-2010, 10:22 AM
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Default Re: High oil temperature - A6 2.7T

The owner's manual covers 2.7, 3.0, 4.2 engines.

2.8 is a different beast.

You might not know what was in (mineral?)before you switched to 0-40.

The fact is that Mobil 1 Extended performance (much more "full" synthetic than regularar Mobil 1) does not have 0-40.
Let's not start a discussion about oils...
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Old 06-30-2010, 10:44 AM
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Default Re: High oil temperature - A6 2.7T

Agreed there is nothing wrong with the oil temp in your pic especially during summer months.

I use Mobil1 and it is full synthetic although I can't speak to some of their newer flavors coined with names like new vehicle / high mileage / extended performance / etc. You can identify full synthetic by a reputable retailer price as you get what you pay for. A good price for full synthetic approaches $10/L and above.
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Old 08-11-2010, 09:33 PM
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Default Re: High oil temperature - A6 2.7T

Sorry to disappoint you. You have a problem and this is not thermostat. It is your coolant leaking probably through the pump. You can not see the pump as it is where your timing belt is. Do not even try to use any "coolant stop leak" because you will plug the whole system.
You need to replace the seal on your pump, the pump itself and when you do it the timing belt and tensioner as these parts are already eaten by the antifreeze.
In case you do not do it your oil temperature will be going up and up to 160 where you get warning lite and the engine starts to boil. By now your car developed air bubbles and you will not have any heat inside the car during winter. Check your heat now it is not as hot as it used to be - right?
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Old 08-11-2010, 09:36 PM
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Default Re: High oil temperature - A6 2.7T

Originally Posted by vghostine
Could it be the OIL TEMP SENSOR that needs to be replaced? The car has 142000 kms.
NO it is not!
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