DIY Convert fuel economy gauge to oil temperature

mecheng77 · 07-13-2019, 07:38 PM

Perfekt toolbox is used to program the fuel economy gauge into oil temperature in 5 minutes and no special tools beyond a D+KCAN cable.

Yes, fuel economy is important to know and track but its in the gauge cluster, both average and instantaneous. If you don't have it, it can be easily programmed. A dial fuel economy is very annoying; but oil temperature is very useful. Especially if you take short trips in the cold you will realize you won't necessarily reach 100C which is necessary to burn off water vapor. Or if you drive on hot days or track the car, make sure you are not running the oil temperature above what the oil is rated for. You should aim to run the oil temp from 110C to 125C and never exceed 150C with a synthetic.

LMB335IS · 07-16-2019, 07:00 PM

Quote:

Originally Posted by mecheng77

Perfekt toolbox is used to program the fuel economy gauge into oil temperature in 5 minutes and no special tools beyond a D+KCAN cable.

Yes, fuel economy is important to know and track but its in the gauge cluster, both average and instantaneous. If you don't have it, it can be easily programmed. A dial fuel economy is very annoying; but oil temperature is very useful. Especially if you take short trips in the cold you will realize you won't necessarily reach 100C which is necessary to burn off water vapor. Or if you drive on hot days or track the car, make sure you are not running the oil temperature above what the oil is rated for. You should aim to run the oil temp from 110C to 125C and never exceed 150C with a synthetic.

If you really want to do it right without having to swap in a 335i cluster, get a junk 335i or 328i cluster with the oil temp face and swap out the face. Take the settings for a 335i tach and code them in using the same procedure you did with the oil temp so the scaling is correct.

ryanful · 08-19-2020, 06:10 PM

So easy!!!

Thank you for the easy to follow instructions and video.

I don't know why any enthusiast wouldn't do this.

07-13-2019, 07:38 PM	#1
mecheng77 Colonel 1006 Rep 2,243 Posts Drives: 2007 328i / 2014 M235i Join Date: Nov 2017 Location: Ontario Canada iTrader: (0) Garage List [0.00] [0.00]	DIY Convert fuel economy gauge to oil temperature Perfekt toolbox is used to program the fuel economy gauge into oil temperature in 5 minutes and no special tools beyond a D+KCAN cable. Yes, fuel economy is important to know and track but its in the gauge cluster, both average and instantaneous. If you don't have it, it can be easily programmed. A dial fuel economy is very annoying; but oil temperature is very useful. Especially if you take short trips in the cold you will realize you won't necessarily reach 100C which is necessary to burn off water vapor. Or if you drive on hot days or track the car, make sure you are not running the oil temperature above what the oil is rated for. You should aim to run the oil temp from 110C to 125C and never exceed 150C with a synthetic.
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08-19-2020, 06:10 PM	#3
ryanful Second Lieutenant 51 Rep 200 Posts Drives: 16 X5,06 e91 325ix,03 Mini R50 Join Date: Jan 2010 Location: Vancouver iTrader: (2) Garage List 2016 BMW X5 xDrive3 ... [0.00] 2006 BMW 325xiT WAGON [0.00] 2009 BMW 128i Conve ... [0.00]	So easy!!! Thank you for the easy to follow instructions and video. I don't know why any enthusiast wouldn't do this.
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