Drop in fuel economy

Stueys · 25th December 2011, 22:04

Our new crv (about 6k on the clock) seems to have suffered a recent drop in mpg. DTEC engine, we seem to be hitting 32mpg at motorway speeds where the car would comfortably have cruised at 34-35mpg.

Thought the car may have needed a Dpf regen but a good 1 hr each way motorway journey today hasn't shifted the issue.

One thing I have noticed I'd the car is running at a temp 2 to 3 bars below mid-point on the temp gauge. If the engine isn't running at operating temp it would be drinking more.

So, any ideas on potential problems? What operating temps are people seeing on these?

Thanks

Woette · 26th December 2011, 10:44

I think its just the cold weather, i notice a drop in mpg every year when winter comes. THe engine just needs more time to get to optimal temp. I wouldnt worry about it

mpn_daedalus · 26th December 2011, 11:46

Quote:

Originally Posted by Woette

I think its just the cold weather, i notice a drop in mpg every year when winter comes. THe engine just needs more time to get to optimal temp. I wouldnt worry about it

+1

Probably just the weather. Nothing to worry about

Stueys · 26th December 2011, 14:50

Thanks for that. I'll see what its like when it gets warmer. I still think something is amiss though, it wasn't that cold yesterday (I'm waiting for snow) still!). Plus my car (335d) doesn't get impacted by cold weather, is this just a Honda engine thing?

mpn_daedalus · 26th December 2011, 22:16

All engines should be effected by intake temperature. Maybe some are effected more than others?

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Stueys · 29th December 2011, 14:45

Had my local Honda dealership take a quick look this morning, they couldn't find anything amiss. Essentially checked the engine for error codes.

So I'm watching to see if it improves back again.

owen243 · 29th December 2011, 14:56

My engine idles higher on cold mornings / starts and I drop MPG too so I wouldnt worry too much either .

So maybe idleing higher and when driving your revs are higher than it would be before maybe? Just trying to put 2 and 2 together lol

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regan1985 · 29th December 2011, 15:23

i would say weather or rear brakes sticking is the common reason why your mpg drops on the civic

Stueys · 29th December 2011, 22:54

Thanks appreciate the advice. One question, on a dtec crv where is everyone seeing the temp gauge sit at when the car reaches operating temp?

Mine sits 2 to 3 bars below mid-point, which I'm being told is right.

uncle_rob · 29th December 2011, 23:03

Quote:

Originally Posted by Stueys

Thanks appreciate the advice. One question, on a dtec crv where is everyone seeing the temp gauge sit at when the car reaches operating temp?

Mine sits 2 to 3 bars below mid-point, which I'm being told is right.

Wouldnt worry. Mydads crv gets 31mpg this time of year n the north west. Disappointing but all thanks to the cold weather

dcivic · 30th December 2011, 18:38

Quote:

Originally Posted by Stueys

Mine sits 2 to 3 bars below mid-point, which I'm being told is right.

That sounds ok to me, it's been like that on all Hondas I have driven.

Stueys · 30th December 2011, 19:38

Quote:

Originally Posted by dcivic

That sounds ok to me, it's been like that on all Hondas I have driven.

Thanks for that

Stueys · 15th January 2012, 20:43

Thought I'd update on this. Fuel economy now back where it was, despite the tempreture being significantly colder than when we noticed the issue (at least 8 c lower). Only thing I can think of is maybe a dodgy tank of diesel which took 2 or 3 tanks to dilute out. Running temp remains unchanged. Odd but happy the economy is back where it was.

25th December 2011, 22:04	#1 (permalink)
Stueys Join Date: 24th October 2011 Location: Uk Posts: 15 Thanks given: 0 Thanked 0 Times in 0 Posts iTrader: (0)	Drop in fuel economy Our new crv (about 6k on the clock) seems to have suffered a recent drop in mpg. DTEC engine, we seem to be hitting 32mpg at motorway speeds where the car would comfortably have cruised at 34-35mpg. Thought the car may have needed a Dpf regen but a good 1 hr each way motorway journey today hasn't shifted the issue. One thing I have noticed I'd the car is running at a temp 2 to 3 bars below mid-point on the temp gauge. If the engine isn't running at operating temp it would be drinking more. So, any ideas on potential problems? What operating temps are people seeing on these? Thanks

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26th December 2011, 10:44	#2 (permalink)
Woette Car: '07 1.8 MR Type-S 61000 km Join Date: 7th October 2007 Location: Leuven, Belgium Posts: 1,831 Thanks given: 90 Thanked 114 Times in 113 Posts iTrader: (0)	I think its just the cold weather, i notice a drop in mpg every year when winter comes. THe engine just needs more time to get to optimal temp. I wouldnt worry about it

26th December 2011, 14:50	#4 (permalink)
Stueys Thread starter Join Date: 24th October 2011 Location: Uk Posts: 15 Thanks given: 0 Thanked 0 Times in 0 Posts iTrader: (0)	Thanks for that. I'll see what its like when it gets warmer. I still think something is amiss though, it wasn't that cold yesterday (I'm waiting for snow) still!). Plus my car (335d) doesn't get impacted by cold weather, is this just a Honda engine thing?

26th December 2011, 22:16	#5 (permalink)
mpn_daedalus ...............Daedalus Car: CW Type R No. 460 Join Date: 5th August 2010 Location: Norfolk, UK Posts: 3,575 Thanks given: 222 Thanked 424 Times in 394 Posts iTrader: (3)	All engines should be effected by intake temperature. Maybe some are effected more than others? Sent from my X10i using Tapatalk

29th December 2011, 14:45	#6 (permalink)
Stueys Thread starter Join Date: 24th October 2011 Location: Uk Posts: 15 Thanks given: 0 Thanked 0 Times in 0 Posts iTrader: (0)	Had my local Honda dealership take a quick look this morning, they couldn't find anything amiss. Essentially checked the engine for error codes. So I'm watching to see if it improves back again.

29th December 2011, 14:56	#7 (permalink)
owen243 !-! Car: Milano Red CTR FN2 Join Date: 16th January 2010 Location: London Posts: 355 Thanks given: 27 Thanked 8 Times in 7 Posts iTrader: (1)	My engine idles higher on cold mornings / starts and I drop MPG too so I wouldnt worry too much either . So maybe idleing higher and when driving your revs are higher than it would be before maybe? Just trying to put 2 and 2 together lol Sent from my Galaxy Nexus using Tapatalk

29th December 2011, 15:23	#8 (permalink)
regan1985 Replica man Car: 2006 1.8 Type s Gt Black Join Date: 5th March 2010 Location: Oxford Posts: 2,031 Thanks given: 304 Thanked 174 Times in 170 Posts iTrader: (4)	i would say weather or rear brakes sticking is the common reason why your mpg drops on the civic

29th December 2011, 22:54	#9 (permalink)
Stueys Thread starter Join Date: 24th October 2011 Location: Uk Posts: 15 Thanks given: 0 Thanked 0 Times in 0 Posts iTrader: (0)	Thanks appreciate the advice. One question, on a dtec crv where is everyone seeing the temp gauge sit at when the car reaches operating temp? Mine sits 2 to 3 bars below mid-point, which I'm being told is right.

15th January 2012, 20:43	#13 (permalink)
Stueys Thread starter Join Date: 24th October 2011 Location: Uk Posts: 15 Thanks given: 0 Thanked 0 Times in 0 Posts iTrader: (0)	Thought I'd update on this. Fuel economy now back where it was, despite the tempreture being significantly colder than when we noticed the issue (at least 8 c lower). Only thing I can think of is maybe a dodgy tank of diesel which took 2 or 3 tanks to dilute out. Running temp remains unchanged. Odd but happy the economy is back where it was.