Drop in MPG E90 325D

Bazzswann · 02-04-2015, 02:13 PM

Guys

I have a 2007 E90 325D M-Sport Auto and lately i have seen a drop in fuel consumption. I googled it and one of the common issues was the thermo, i looked at the hidden Menu and checked the Temp

After 10 Miles it was 59, 20 miles it was 65. The highest i had was 72.

What is the ideal coolant temp?

Anything else that could be causing it?

Cheers

David c · 02-04-2015, 02:18 PM

I'd say that's too low you need to be at least into the mid 80's ideally low 90's but hopefully changing both your thermostats will sort that out for you.

Bazzswann · 02-04-2015, 02:19 PM

Cheers David, big job or not? Im only used to old Jap cars so havent a clue lol

David c · 02-04-2015, 02:24 PM

Not a massive job to do,I think these a guide somewhere on here how to change them.

David c · 02-04-2015, 02:40 PM

Take a look at this mate;

http://www.e90post.com/forums/showthread.php?t=632656

holmefield · 02-04-2015, 03:34 PM

Mine was just as yours just before crimbo after 10 or so miles 73c was my limit...i took the EGR stat off and really struggled to blow through it so ordered a main stat from ALLGERMANCARPARTS £44.00 delievered for a Genuine OEM main stat, fitted it myself ( 330 D ) and my temps are averaging between 85c/90c now..

xube8 · 02-04-2015, 06:16 PM

Hiya
I had mine done last week.
Was hovering around 62 and 72 and since they've been replaced it's staying around late 80s.
I got both the main and the egr start from GSF for £59, was £75 but if you order online and collect from the store you get a voucher code which gets you a 20% discount.

Jase 320d · 02-04-2015, 07:22 PM

With both genuine stats i hit 88-91 degrees no less

Buy genuine some patent ones last a month

Bazzswann · 02-08-2015, 10:26 AM

Right, could be a related issues or not but just been out in the car today and it felt a bit under powered, normally when you put it in Drive it moves forward but hasnt of late.

Done a couple of miles to the shop and back and when i got home it was smoking a bit and a burning smell lingered.

Any ideas?

02-04-2015, 02:13 PM	#1
Bazzswann New Member 4 Rep 21 Posts Drives: BMW E90 325D M-Sport Join Date: Nov 2014 Location: Milton Keynes iTrader: (0)	Drop in MPG E90 325D Guys I have a 2007 E90 325D M-Sport Auto and lately i have seen a drop in fuel consumption. I googled it and one of the common issues was the thermo, i looked at the hidden Menu and checked the Temp After 10 Miles it was 59, 20 miles it was 65. The highest i had was 72. What is the ideal coolant temp? Anything else that could be causing it? Cheers
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02-04-2015, 02:18 PM	#2
David c Private 5 Rep 81 Posts Drives: E92 325d M Sport Join Date: May 2013 Location: North East iTrader: (0)	I'd say that's too low you need to be at least into the mid 80's ideally low 90's but hopefully changing both your thermostats will sort that out for you.
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02-04-2015, 02:19 PM	#3
Bazzswann New Member 4 Rep 21 Posts Drives: BMW E90 325D M-Sport Join Date: Nov 2014 Location: Milton Keynes iTrader: (0)	Cheers David, big job or not? Im only used to old Jap cars so havent a clue lol
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02-04-2015, 02:24 PM	#4
David c Private 5 Rep 81 Posts Drives: E92 325d M Sport Join Date: May 2013 Location: North East iTrader: (0)	Not a massive job to do,I think these a guide somewhere on here how to change them.
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02-04-2015, 02:40 PM	#5
David c Private 5 Rep 81 Posts Drives: E92 325d M Sport Join Date: May 2013 Location: North East iTrader: (0)	Take a look at this mate; http://www.e90post.com/forums/showthread.php?t=632656
	Appreciate 1 Quote

02-04-2015, 03:34 PM	#6
holmefield Captain 61 Rep 615 Posts Drives: 330 d m sport Join Date: Oct 2014 Location: burnley iTrader: (0)	Mine was just as yours just before crimbo after 10 or so miles 73c was my limit...i took the EGR stat off and really struggled to blow through it so ordered a main stat from ALLGERMANCARPARTS £44.00 delievered for a Genuine OEM main stat, fitted it myself ( 330 D ) and my temps are averaging between 85c/90c now..
	Appreciate 0 Quote

02-04-2015, 06:16 PM	#7
xube8 Private 1 Rep 71 Posts Drives: bmw e90 320d lci Join Date: Oct 2014 Location: manchester iTrader: (0)	Hiya I had mine done last week. Was hovering around 62 and 72 and since they've been replaced it's staying around late 80s. I got both the main and the egr start from GSF for £59, was £75 but if you order online and collect from the store you get a voucher code which gets you a 20% discount.
	Appreciate 0 Quote

02-04-2015, 07:22 PM	#8
Jase 320d Wheelbarrow Edition 63 Rep 1,608 Posts Drives: Arctic 320d Join Date: Sep 2013 Location: Dumfries and Galloway iTrader: (1)	With both genuine stats i hit 88-91 degrees no less Buy genuine some patent ones last a month
	Appreciate 0 Quote

02-08-2015, 10:26 AM	#9
Bazzswann New Member 4 Rep 21 Posts Drives: BMW E90 325D M-Sport Join Date: Nov 2014 Location: Milton Keynes iTrader: (0)	Right, could be a related issues or not but just been out in the car today and it felt a bit under powered, normally when you put it in Drive it moves forward but hasnt of late. Done a couple of miles to the shop and back and when i got home it was smoking a bit and a burning smell lingered. Any ideas?
	Appreciate 0 Quote