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Oil Temp Gauge Tick Values

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Old Jun 11, 2011 | 12:27 AM
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Default Oil Temp Gauge Tick Values

I know this has been brought up in the past but I can't seem to find a thread about it.

Each oil temp gauge tick on the scale between 100 and 220 degrees represents 15 degree increments. Yet each tick between 220 and 260 degrees are 5 degree increments. This makes no sense to me as it can't be linear and non linear at the same time.......can it?
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Old Jun 11, 2011 | 01:05 AM
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Originally Posted by Shylor
I know this has been brought up in the past but I can't seem to find a thread about it.

Each oil temp gauge tick on the scale between 100 and 220 degrees represents 15 degree increments. Yet each tick between 220 and 260 degrees are 5 degree increments. This makes no sense to me as it can't be linear and non linear at the same time.......can it?
Just calibrated that way for display purposes. Same thing with your speedometer... there's a lot more gauge swing for the first 100mph than for the 2nd 100... (aka, from 100-200mph).

All a matter of what the PCM says to show and since they're obviously not old-school mechanical gauges the ticks can vary in terms of what they represent.

In a similar fashion, some manufacturers have a dead band on, for example, your coolant temp. Within the normal 20-30 degree operating range, the gauge will stay in one spot, even though the sending unit is obviously reflecting fluctuations up and down in terms of temp. Again the PCM is showing a refined output of sorts.
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Old Jun 11, 2011 | 05:07 AM
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Originally Posted by Shylor
I know this has been brought up in the past but I can't seem to find a thread about it.

Each oil temp gauge tick on the scale between 100 and 220 degrees represents 15 degree increments. Yet each tick between 220 and 260 degrees are 5 degree increments. This makes no sense to me as it can't be linear and non linear at the same time.......can it?
What is this "Oil Temp Gauge" of which you speak? There is no "gauge" for oil temps. "Oil Temp" is displayed on the DIC.

IF, you are referring to the ECT gauge, the answer to some your question/comment is in your OM, and I agree with bdhigs as regards "linearity". It is not. The gauge is set up and the pcm is programmed that way. It's a "logarithmic" type scale reading. I'm thinking the small gauge size has a lot to do with it.

From what I'm hearing from your question, you don't like it.
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Old Jun 14, 2011 | 01:30 AM
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Originally Posted by LoneStarFRC
There is no "gauge" for oil temps.
What was I thinking? Sorry, I meant the water temp gauge, on the far left of the instrument cluster.
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