engine and drivetrain Average oil temps?

[msh441]

Just curious...

 

I have a street-driver '02.  Just went from an OE rad with should and tropical fan to a new IE aluminum rad and e-fan kit.

 

Water temps look good, and when the gauge gets a little above the 1/2 point, fan kicks on as designed and cools everything down just fine.

 

I've noticed however, that my engine oil temp has taken a slight jump, based at least on the crappy gauge in my car. Where I was running about 210-215 on the gauge (right on the line between green and yellow). Now it hovers right around 235-240 (yellow, into red).  Again, coolant temp, oil pressure all seem fine, and it was a 90-degree day, yesterday.

 

So for those with better gauges than mine... what oil temps are you seeing?

 

what engine oil temps are considered excessive in the '02?

[roadhog0]

On a hot day or cold I see about 200 on the dot in my car. Because it matters, I my sensor is at the oil filter housing in the path of the oil flow.

[jrkoupe]

usually 200.....

 

 

check gauge/sender

[msh441]

Mine is and electric sender, tapped into the oil filter housing, too.

 

Looking at VDO sender units, and it seems like they come in 250F and 300F flavor. My crappy gauge goes from 0-280.

 

Wondering if the sender isn't a 250, and is causing the 280 gauge to read a bit higher.

[jimk]

For every 10F temperature increase above 250F, the rate of oxidation doubles.  Bear in mind though a reading is the bulk oil temperature and oil films on the surface of certain parts is quite a bit higher, so that is why a high flashpoint oil does better for cylinder wall lube (reduced wear).

[harold]

For every 10 degrees C (not F), chemical reaction rates double.  That's 18 degrees F.    I don't know how susceptible oil is to oxidation, but 2X a very low rate is still a small number. 

 

H

[ifayeoh]

Sounds about normal. Considering water cools down alot faster than oil, hence the oil will stay hotter longer and probably never cool down till engine is off.

The electric fan will only cool the water.

Where is the water sender located? 

Maybe fan coming on to late? Depends on water sender location.

Get a separate water gauge to help.

[msh441]

If I'm not mistaken, water temp sender is just off the head, where the two large/upper radiator hoses meet (one to upper rad tank, the other to the thermstat).

 

Fan sensor/switch is between the thermostat and the lower tank.

 

PSI is off the oil pressure sending unit, and oil temp off the filter housing.

[TobyB]

On a street car that's not working hard, usually not much above water temps (200 sounds about right)

 

When it starts working hard in high heat, 250 is pretty reasonable.

 

Much over that, and either you're at the track on a hot day, or something's going wrong.

 

I found the M10 needs a bit of oil cooler for the track, especially if you don't use synthetic.

 

t

 

[roadhog0]

This is the temp sender that I use (it's not a switch). It's a VW part that works awesome and has the same specs as the VDO temp sender for 0-300 F

 

http://www.amazon.com/Beck-Arnley-201-1730-Temperature-Switch/dp/B000CB5IHC