what temp does your oil get up to?

[chrissyr32]

109 HIGHEST I EVER HAD IT AND THAT WAS AFTER A HOT DAY AND VERY FAST DRIVING!!!

[sonny]

127c at Bruntters

[ArthurPE]

1 oil doesn't break down at 250F...a good synthetic is good to 300 for short periods, normal operating temp is 212, to vaporize the water...
flashpoint is >400F

2 the temp displayed is the hotest it gets, in the sump, before it's cooled...
so by the time it gets back to the engine it's cooled down 20 to 40 F....

and temp is only one factor to breakdown: shear, contamination, etc.

changing oil every other week! how many miles?

[SR71]

Flashpoint of my oil was down to 155C on removal last time it was analysed...

FWIW.

[chrissyr32]

1 oil doesn't break down at 250F...a good synthetic is good to 300 for short periods, normal operating temp is 212, to vaporize the water...
flashpoint is >400F

2 the temp displayed is the hotest it gets, in the sump, before it's cooled...
so by the time it gets back to the engine it's cooled down 20 to 40 F....

and temp is only one factor to breakdown: shear, contamination, etc.

changing oil every other week! how many miles?

EH????????? This guy baffles me with his stats and posts!! Is it just me???

[P_G]

Try reading it a few times and then it sinks in!

[SR71]

Track? What???

Can you guess which way the circuit went...

[SwedishRS4]

120?????!!!!!

Normal driving 90-98 and spirited driving in the alps, a 107! And 107 is the highest ive seen.....

[djt]

WOW those are high temps or maybe im NOT ragging m car hard enough!..lol

Normal drivign conditions are 96c and aspirated road drives (not track) around 106c

Same for me but I haven't had mine long so not much experience yet

[sonny]

I noticed that my normal oil temp (day to day driving) changed when i had my car serviced, it sat at a hotter temp around +4>6 degrees hotter! I can not confirm what oil was in the car prior to the oil change.

[ghoonk]

Good to see this thread -- I sleep a lot better at night now.

I came from a Mitsu Evo 8MR and used to run oil temps at 90C on normal driving, 130C on track. In the RS4, I'm at 99C on normal driving, 110C on spirited driving (ambient temp is around 40C here in Dubai at the moment) and was a little worried if there was something wrong with my car. Nice to know that this is 'normal'

[Teutonic_Tamer]

There was a thread on this same topic some time back, I get to 138 on normal roads but opening the tap a bit , talking to Audi Germany re this due to the fact that oil starts to break down at 118 to 120ºC area so we loose above 50% of the oil's capability to protect..

Really? I strongly doubt it!

504.00 oils are HTHS rated to over 150deg C. Any oil which starts to break down around 120deg C is NOT a genuine fully synthetic oil, and nor will it be 504.00 approved.

[Teutonic_Tamer]

MikeD,

Have you spoken to the gurus (Guy) at Opie Oils (http://www.opieoils.co.uk) about your issues?

They're extremely knowledegable and might be able to advise you temporarily on a high temperature solution...maybe you need to move away from a multigrade oil for the summer? Something like a "60" oil except that in a V8 which revs to 8000+rpm, in theory, thats not ideal...

Wow - that is really 'old skool' advice! Modern, low viscosity, high quality synthetics can easily cope with mean oil temperatures of 150deg C. How do you think the factory filled 5w30 504.00 oils fair in even hotter places such as Dubai - and in the raging furnace-like turbo bearings of the RS6 motors?

I don't know enough though.....

Lips 'r' sealed . . .

I get all my oil from them - they're about the only place I know about in the country where I can find the Titan Fuchs factory fill oil for the RS4.

There is some debate on the 'factory fill' being Fuchs. Both VW and Audi clearly state that all their OEM engine oils are soley developed by Castrol - so how do Fuchs now enter this particular equation?

[Teutonic_Tamer]

1 oil doesn't break down at 250F...a good synthetic is good to 300 for short periods, normal operating temp is 212,

What are those temps in the international unit of centigrade?

flashpoint is >400F

Which has exactly what to do with the oils lubricating properties?

2 the temp displayed is the hotest it gets, in the sump, before it's cooled...

Not quite. Yes, the temperature IS taken from the sump - but sump oil is categorically not the hottest location for the oil. Localised oil temperatures will be noticeably hotter on the small-ish volumes of oil which is sprayed onto the underside of the pistons. And the same can be said for the localised oil surrounding the valve stems of the exhaust valves.

And although we arn't graced with turbos on the B7 RS4 - turbo bearings are arguably by far the hottest localised area for oil.

so by the time it gets back to the engine it's cooled down 20 to 40 F....

Rubish. For a modern automotive specific engine oil - its optimum operating temperature is in excess of 80-85 deg C. If the oil drops below 60deg C, it noticeably looses some of its lubricating abilites.

and temp is only one factor to breakdown: shear, contamination, etc.

Sort of agree - but only on generalistic terms. 503.00 and above oils have an additional HTHS - or 'High Temperature, High Shear' test - so won't be an issue. And then contamination - if your oil contains enough 'contaminents' to lessen the lubricating qualities of the oil, then either there is a problem with filtration (no element, damaged filter medium, or incorrect filter), or the oil is massively beyond its sheduled oil change interval.

changing oil every other week! how many miles?

Bonkers . . . . utterly bonkers.

[ArthurPE]

mine runs ~ 90C or so, but as high as 100C when pushed hard (accle runs, up grade, etc.)
it varies a bit with OA temp