water temp Oil temp observations (Experiment)

Hello All

 

Some time ago I read about a heat type shield to help to shorten up the warming up time of diesel skoda cars as there was a general though that they are very slow to warm up and in particular defog the windows). To this end I have started an experiment which I have been running for some time. I have a lot more experimentation to do before I can post conclusive results but here are the details thus far.

Test subject: 2008 skoda scout with circa 122000 miles. This car has a diesel PD bmm engine (2.0 liter)

I use a hand held infra red thermometer to take my readings. The reading that I take are as follows:

1) The water temperature at the gauge (dash)

2) I have a mark on the metal housing which holds the oil filter. I take this as the oil tempature

3) At the the base of the housing which holds the oil filter there is a heat exchanger (some call it an oil cooler)

 

The following is a summary of my observations

Open road driving when the engine is up to tempature

Gauge temp 90 degrees C

Oil temp 81-83 degrees C

Heat Exchanger 83-84 degrees C

 

Open road driving when the engine is up to tempature

Gauge temp 90 degrees C

Oil temp 81-83 degrees C

Heat Exchanger 83-84 degrees C

 

Town driving

Gauge temp 90 degrees C

Oil temp 90 degrees C

Heat Exchanger 90 degrees C

 

I take the same route into work each morning (mix of rural and urban) (3 mile run)

Air temp circa 13  degrees C

                     Gauge temp       Oil Temp      HE temp

1 mile            less than 50         39                 45

2 miles          70                           51                60

3 miles          90                           66                72

 

Open road narrow country roads (Air temp circa 9 degrees) no load on engine

                     Gauge temp       Oil Temp      HE temp

1 mile          less than 50         34                 37

2 miles        58                          45                 50

3 miles        75                          55                 62

4 miles        88                          65                72

5 miles        90                          71                77

 

 

Idle car to warm up no electrical load (air temp 12.5 degrees C) no loads on engine

Time        Gauge temp           Oil Temp      HE Temp

0  min        less than 50              15                 15

2 min         less than 50              17                 17

3 min         less than 50              20                 22

4 min         less than 50              23                 24

5 min         less than 50              30                 31

9 min         less than 50              38                 40

10 min       less than 50              40                 42

 

 

The above is a summary of the information obtained to date. It does not contain any cold weather data but it is a very useful base line.Of particular note is 1 mile of country driving gives you an oil temp of 34 - 39 deg C, Heat Exchanger  37 -44 Degrees C (Gauge less than 50)

and 10 minutes of idle time gives an oil temp of 40 degrees C and Heat Exchanger temp of 42 degrees C. Thus the practice of extended idle times to warm up the engine would appear not to be a good practice.

 

I will post more information when I have it.

 

Thoughts and observations on this date/ conclusions

 

Regars

 

TSM