After switching out my stock gauges from metric to Defi BF Imperial, I've noticed my oil temps didn't scale correctly. Normally, I would hover around 75C with street cruising and up to 95C depending upon ambient temp and driving style. Now, I average 215-225F according to my Defis (which is up to 105C for normal driving - outside temps in the upper 70s-low 80s). Either my old stock gauge was off, or my Defis are off.

Question is: What's the deal with those oil temps? Do the seem a bit high for Farenheit even for an Evo at normal driving? Anyone make the switch from C to F notice this jump or have experience/opinions?

 

Is the probe in the same place as before or did you move it?

 

defi gauges read higher then normal!
also my car at cruising speeds i see 80 celsius and when i do fast and hard driving it goes up to 92 celsius this is using my stock oem gauges!

 

Same. Nothing changed but the gauges. Checked oil cooler to see if there was something blocking it, but that was fine. Water temp (dummy light) is norm. Car seems fine. Just curious about those readings. Chalk it up to higher reading Defis? I like to cover my bases and eliminate any potential issues which is why I asked.

 

how did you put the new temp sensor in the pan?? or did you use the stock one?

 

I've seen as high as 220F in 95 degree weather traveling 80mph or so. It's gotten slightly above that with 4th & 5th gear pulls with the same ambient temps. I'm using Defi's D-series with the probe located in one of the gallies in the engine block.

 

225 is dead on perfect. And Defi gauges are tested w/i 5degs, so you are fine. My Defi Oil Temp reads 210-240 daily driving - and past 300 at the track. Mind you, I still have the oil pan sensor. Which is pre-cooler and post turbo. So its no surprise the oil is smoking hot.

According to Smokey's race book, you never want to break 280' - thats when the oil breaks down and loses it's ability to protect/support the crank and rod bearings.

I'd love to switch over to a more accurate sensor location. Could you list your specifics on the install, please?

 

Oil will actually be cooler in the oil pan since there is some air flow there and also has all the other oil to act as a large heat sink. I moved my sensor from the pan to the oil housing pre cooler and its much much warmer.

I hit 132c at the track and 90c on street but a little over 100c if I am pushing it on the street.

 

Man... I cant even get mine past 90C!!! Thats even after several (and I mean several) law-breakin freeway runs which I won't speak about! Sorry for the off-topic, but mine is always 70-75C while cruising but that could just be the Seattle climate.

 

Good theory - but its a different story with turbo cars. Our oil is cooked to over 700' F, then it drops straight into the pan - which is where the sensor is located. If you race, you will get the oil so hot, it will bring the entire pan above 300'F.

Our cooler is large enough to bring it down to a safe 240-260' F. - And thats where the sensor should be located (post cooler)

 

It's not a theory, I've seen it with my own eyes on my car and others. Did you read the rest of my post? You will see higher oil temps if you move your probe to the oil filter assembly pre-cooler.

I do open track and I have seen 269F where the probe currently is. The highest I saw it in the oil pan was 240F or so.

Real world > theory.

and 700F? wha? Show me oil that can take that. Didn't you say you don't want to go over 280F above? Oh yes, you did:

Or do you think the stock oil cooler can shed 420F worth of heat and actually reverse the flash point of oil?

 

yeah motor oil thats good to 700F sounds like something a traveling medicinal healer would sell

 

wouldnt you want to read the temp of oil at its hottest point?? like the water temp sensor?? i wouldnt want to know the coolest temp, not after its gone through the cooling system....??

 

The HOUSING is +700'F, not the oil. So, like I said - the oil gets cooked at 700'F. Think before you respond.

And yes - over 280'F while being pumped through the engine is approaching the limit of providing a safe barrier b/w the crank & bearings.

Again - dont question what you already know

 

You want to know the temp just before it circulates through the engine - not right after the turbo. Kind of like measuring the intake charge temps before the intercooler.