MPG 1.8 VTEC Bad Economy? - Civinfo

 29Likes
Reply
 
LinkBack Thread Tools
post #1 of 43 (permalink) Old 4th May 2017, 09:38 Thread Starter
 
jamesrob's Avatar
 
Join Date: 2nd November 2016
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader: (0)
Unhappy 1.8 VTEC Bad Economy?

Hi all Civinfo members! Hope you can help me...

I'm a long time viewer of the forum but never posted before! Proud owner of a 61' reg 1.8 Type S GT on 56k miles. Had it for nearly two years and I love it! Handles very well, it's comfy for long business miles up and down the motorway and that n/a engine (whilst no Type R) is a peach!

However, I have a query regarding MPG... (and before you ask I have checked out the many threads on here!)

Typical driving is 10 mile commute each way from work. 50% motorway, 50% city/stop start.

Can't seem to get above 33mpg even driving like a saint, normally it is around the 31mpg mark (which probably works out about 28mpg real). On a long run, 60 mph returns an indicated 45mpg, 70 returns 40mpg, 80 returns 35mpg and a recent long motorway run at 85mph got 40mpg? Go figure...

Fellow 1.8 drivers - is this normal???

Got a couple of theories why it might be down - maybe you could shed some light onto these

- Runs on Honda 18" Rims. Bigger rims equals ***** mpg?

- Spark plugs never been replaced, on the assumption these are long life and don't need to be replaced until 75k.

Any help would be much appreciated!
jamesrob is offline  
Sponsored Links
Advertisement
 
post #2 of 43 (permalink) Old 4th May 2017, 09:43
Supporter
 
flashy's Avatar
 
Car: NHB FN2 CTR GT
Join Date: 30th June 2015
Location: Swindon ENGLAND
Posts: 5,065
Thanks: 301
Thanked 453 Times in 419 Posts
iTrader: (12)
Are you basing this on the cars displayed figures or are you calculating yourself between fill ups? My "miles to empty" display is fairly erratic. Your mpg sounds fine for the 1.8 btw.
flashy is online now  
post #3 of 43 (permalink) Old 4th May 2017, 09:45
Administrator
 
Farqui's Avatar
 
Car: x'06 2.2 EX FK3 Milano
Join Date: 29th April 2014
Location: n.Notts ENGLAND
Posts: 14,569
Thanks: 5,711
Thanked 3,705 Times in 3,415 Posts
iTrader: (31)
Eco display Eco display
Garage
Hmmm, as @flashy states...the figures don't look too unusual. Have you seen a sudden drop in mpg?

Sticky caliper? - sticky slider pins are a pretty common issue on most cars these days.

After a steady drive, does one/more brake disk feel hotter than the others? - be careful not to burn yourself tho
Farqui is offline  
post #4 of 43 (permalink) Old 4th May 2017, 09:49
Supporter
 
lightningslow's Avatar
 
Join Date: 11th July 2015
Location: essex ENGLAND
Posts: 1,163
Thanks: 27
Thanked 100 Times in 97 Posts
iTrader: (9)
Have you reset the trip computer at all?

I would replace the sparks as they're only £40 for a set and stop start driving can foul them easily as well.

Was the air filter element changed recently? 0w30 A5 B5 oil?

18" wheels will affect MPG by a 1-3MPG as they're usually heavier but not loads. I can easily get mid 40's driving at 70mph on the motorway in mine. I can get high 50'5 cruising at 55mph.
lightningslow is offline  
post #5 of 43 (permalink) Old 4th May 2017, 10:22
Administrator
 
Kremmen's Avatar
 
Car: MY13 1.8 EX Auto
Join Date: 7th January 2007
Location: West London ENGLAND
Posts: 17,935
Thanks: 776
Thanked 1,500 Times in 1,233 Posts
iTrader: (0)
Eco display Eco display
Garage
Quote:
Originally Posted by jamesrob View Post
Hi all Civinfo members! Hope you can help me...

I'm a long time viewer of the forum but never posted before! Proud owner of a 61' reg 1.8 Type S GT on 56k miles. Had it for nearly two years and I love it! Handles very well, it's comfy for long business miles up and down the motorway and that n/a engine (whilst no Type R) is a peach!

However, I have a query regarding MPG... (and before you ask I have checked out the many threads on here!)

Typical driving is 10 mile commute each way from work. 50% motorway, 50% city/stop start.

Can't seem to get above 33mpg even driving like a saint, normally it is around the 31mpg mark (which probably works out about 28mpg real). On a long run, 60 mph returns an indicated 45mpg, 70 returns 40mpg, 80 returns 35mpg and a recent long motorway run at 85mph got 40mpg? Go figure...

Fellow 1.8 drivers - is this normal???

Got a couple of theories why it might be down - maybe you could shed some light onto these

- Runs on Honda 18" Rims. Bigger rims equals ***** mpg?

- Spark plugs never been replaced, on the assumption these are long life and don't need to be replaced until 75k.

Any help would be much appreciated!
Slow down, any speed above 56mph uses more fuel. 33mpg when town driving is involved can be about right.
[H]onda and Tanim like this.
Kremmen is offline  
Thanks to Kremmen from:
post #6 of 43 (permalink) Old 4th May 2017, 11:34
 
Join Date: 3rd March 2008
Location: UK GB
Posts: 52
Thanks: 25
Thanked 6 Times in 4 Posts
iTrader: (0)
Agreed. I'm on my 4th 1.8 (now stop/start, previously with eco button) and I don't think your figures are that far out of kilter. Around town you can reach 35 mpg with gentle driving, a long stretch on the motorway easily well above 40, depending if you floor it to overtake etc. A lot depends on your right foot and getting into highest gear as soon as possible. As you've found out the display is slightly optimistic compared to pump calculations.

(now 5thcivic)
2ndcivic is offline  
post #7 of 43 (permalink) Old 4th May 2017, 14:27
 
Tanim's Avatar
 
Car: 2006 i-Shift 1.8, Silver
Join Date: 10th April 2017
Location: Newcastle, UK ENGLAND
Posts: 82
Thanks: 64
Thanked 4 Times in 4 Posts
iTrader: (0)
Garage
Yep, that's about right. I drive 10 miles from South Shields to Newcastle. 50% of it is traffic crawl and mostly getting 32ish mpg. Used to be 18 mpg in my last car, Mazda 6 MPS 😂
I use shell v nitro btw, gives a tiny bit of performance boost. I love feeling the kick from low down rpm.

Sent from Tapatalk
Tanim is offline  
post #8 of 43 (permalink) Old 4th May 2017, 15:17
Administrator
 
Kremmen's Avatar
 
Car: MY13 1.8 EX Auto
Join Date: 7th January 2007
Location: West London ENGLAND
Posts: 17,935
Thanks: 776
Thanked 1,500 Times in 1,233 Posts
iTrader: (0)
Eco display Eco display
Garage
On a motorway, at 60mph, I can get 55mpg+

Put me in local traffic and that can plummet to 26mpg
Kremmen is offline  
post #9 of 43 (permalink) Old 4th May 2017, 15:46
Bog
Civinfo Hobbyist Trader
 
Bog's Avatar
 
Car: 2016 CR-V 1.6 160 4WD
Join Date: 5th October 2006
Location: Radlett, Hertfordshire GB
Posts: 6,323
Thanks: 277
Thanked 815 Times in 657 Posts
iTrader: (34)
Eco display
Sounds about right to me too. It's what I typically was getting in the three 1.8's I had. I think the best I got was in my 9G EX-GT at 37mpg.
Bog is offline  
post #10 of 43 (permalink) Old 4th May 2017, 15:53
 
Join Date: 3rd April 2017
Posts: 159
Thanks: 8
Thanked 14 Times in 14 Posts
iTrader: (0)
Quote:
Originally Posted by Kremmen View Post
On a motorway, at 60mph, I can get 55mpg+

Put me in local traffic and that can plummet to 26mpg

You can see why people choose the Diesels.Ive yet to drop below 40 mpg in any conditions and i rarely drive like miss daisy.On a motorway at 60mph via the computer im getting over 65mpg.
Dont you think that for a small family saloon 26 mpg is pretty dia? The thirstiest car ive ever owned,the RX8 wasnt much worse,but well worth the money in grin factor.Infact one of the best handling cars this side of 100k
You would think with all the technology advancements they could do better?
Tanim likes this.
1civic is offline  
Thanks to 1civic from:
post #11 of 43 (permalink) Old 4th May 2017, 17:51
 
dobbyboy83's Avatar
 
Car: 55 plate 1.8EX Silver
Join Date: 9th April 2017
Location: Sunderland
Posts: 90
Thanks: 3
Thanked 5 Times in 5 Posts
iTrader: (0)
Over the last 210 miles, according to trip computer. I'm getting around 37.5 mpg. the cars been mixed driving. And when warm vtec'd a few times.

I serviced all parts bar plugs as the now due till next year or 20k.

I always put panel filters in every car I get. Seems to give me +1 more on juice.

Sent from my SM-G920F using Tapatalk
Tanim likes this.
dobbyboy83 is offline  
Thanks to dobbyboy83 from:
post #12 of 43 (permalink) Old 4th May 2017, 18:21
Supporter
 
scaramanga's Avatar
 
Car: 2.2 ctdi
Join Date: 9th May 2011
Location: cumbria ENGLAND
Posts: 569
Thanks: 6
Thanked 61 Times in 61 Posts
iTrader: (1)
Quote:
Originally Posted by 1civic View Post
You can see why people choose the Diesels.Ive yet to drop below 40 mpg in any conditions and i rarely drive like miss daisy.On a motorway at 60mph via the computer im getting over 65mpg.
Dont you think that for a small family saloon 26 mpg is pretty dia? The thirstiest car ive ever owned,the RX8 wasnt much worse,but well worth the money in grin factor.Infact one of the best handling cars this side of 100k
You would think with all the technology advancements they could do better?
before my 2.2 civic i had a petrol 1.8 accord 1850cc i got around 28 to 32 mpg and not much more at best on longer runs
civic paid for itself in fuel saving no problem
im itching to get a new car but the fuel econemy is 1 reason i cant seem to take the plunge
scaramanga is offline  
post #13 of 43 (permalink) Old 4th May 2017, 18:32
Administrator
 
Kremmen's Avatar
 
Car: MY13 1.8 EX Auto
Join Date: 7th January 2007
Location: West London ENGLAND
Posts: 17,935
Thanks: 776
Thanked 1,500 Times in 1,233 Posts
iTrader: (0)
Eco display Eco display
Garage
I last filled mine up on the 26th October and it still has over 3/4 of a tank.
Winter storage.....

Mpg isn't that important to me anymore.
Tanim likes this.
Kremmen is offline  
Thanks to Kremmen from:
post #14 of 43 (permalink) Old 4th May 2017, 18:34
 
dobbyboy83's Avatar
 
Car: 55 plate 1.8EX Silver
Join Date: 9th April 2017
Location: Sunderland
Posts: 90
Thanks: 3
Thanked 5 Times in 5 Posts
iTrader: (0)
from what year do the 2.2 diesels have dpfs fitted?. pros n cons with both.

Sent from my SM-G920F using Tapatalk
dobbyboy83 is offline  
post #15 of 43 (permalink) Old 4th May 2017, 18:44 Thread Starter
** Thread starter **
 
jamesrob's Avatar
 
Join Date: 2nd November 2016
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader: (0)
Thanks for all the responses! I will check the calipers and also look at spark plugs - Where do you find them for £40!? Cox do them for £67 assuming they are the right ones.

Air filter was changed last service. The garage used 5w30 oil (basic Triple QX stuff) so I don't know how much of an impact this would have? Was under the assumtion the 5w just referred to the operating temperate and since we live in the UK and it never gets too Baltic, this would be ok.

Perhaps I should be more clear on the figures though. since I have become of the understanding through these forums that the the 1.8 should be fairly easy to get into the 40's in general driving, I have started calculating the true mpg after each fill-up to the tune of 3-4 mpg the trip computer over reading!

I reset trip A every time I refuel the tank (normally get computer readings 31mpg around town and 40mpg on a long run and leave the trip B on for the last 20k or so (indicated 37.2 mpg). This therefore works out at roughly 27mpg town and 36mpg motorway in real terms, with overall mpg maybe 33 mpg....?? As long as this is normal it's fine...
jamesrob is offline  
post #16 of 43 (permalink) Old 4th May 2017, 18:52
Supporter
 
Adam7's Avatar
 
Join Date: 4th July 2014
Location: Newcastle, UK ENGLAND
Posts: 185
Thanks: 2
Thanked 38 Times in 35 Posts
iTrader: (1)
I got mine from here, but it looks like they've went up since I bought them: http://www.tegiwaimports.com/ngk-las...zfr6k-11s.html As for MPG £40 gets me 300 milesish mixed driving. dobbyboy83 - The 8th Gen doesn't have a DPF. The only 2.2's with DPF's are the 9th gen i-DTEC's.
dobbyboy83 likes this.
Adam7 is offline  
post #17 of 43 (permalink) Old 4th May 2017, 19:00
Off-Road Nut!!!
 
1066 Boy's Avatar
 
Car: 2009 1.8 Type S GT
Join Date: 3rd January 2016
Location: Hastings UK GB
Posts: 238
Thanks: 36
Thanked 75 Times in 74 Posts
iTrader: (0)
Garage
Never done a proper calculation so only got the trip computer to compare.
Average with mixed driving 44mpg. Have got 50mpg on a long motorway run
sitting at 60-70mph. Never seen lower than 36mpg and that was after some serious "playtime"
1066 Boy is offline  
post #18 of 43 (permalink) Old 4th May 2017, 19:04 Thread Starter
** Thread starter **
 
jamesrob's Avatar
 
Join Date: 2nd November 2016
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader: (0)
They are exactly the kind of readings I want!
jamesrob is offline  
post #19 of 43 (permalink) Old 4th May 2017, 19:08
Civinfo Hobbyist Trader
 
Car: CRV EX / CRZ GT
Join Date: 16th August 2008
Location: UK ENGLAND
Posts: 7,914
Thanks: 870
Thanked 1,132 Times in 954 Posts
iTrader: (137)
Quote:
Originally Posted by jamesrob View Post
- Runs on Honda 18" Rims. Bigger rims equals ***** mpg?

Its the wheels and weight of these combined with the tyres, I upgraded the CRZ from the oem 16" to 17" and easily lost around 7mpg on the dash but with the speedo now being just about spot on 30-31mph on speedo reads on GPS while before it was around 27mph I figure I have actually lost around 4mpg real world. Difference when driving long runs etc was easy to get into the mids 50s but now to get 50mpg does need the right run and and me to be easy on the throttle.

Real world real driving average around town now around 38mpg while before it was around 45mpg. I assure you larger wheels have a big effect but this is mainly down to increased weight of the combined rim and tyre etc.
RickHondaR is offline  
post #20 of 43 (permalink) Old 4th May 2017, 19:23
 
Tanim's Avatar
 
Car: 2006 i-Shift 1.8, Silver
Join Date: 10th April 2017
Location: Newcastle, UK ENGLAND
Posts: 82
Thanks: 64
Thanked 4 Times in 4 Posts
iTrader: (0)
Garage
Quote:
Originally Posted by 1civic View Post
You can see why people choose the Diesels.Ive yet to drop below 40 mpg in any conditions and i rarely drive like miss daisy.On a motorway at 60mph via the computer im getting over 65mpg.
Dont you think that for a small family saloon 26 mpg is pretty dia? The thirstiest car ive ever owned,the RX8 wasnt much worse,but well worth the money in grin factor.Infact one of the best handling cars this side of 100k
You would think with all the technology advancements they could do better?
I used to love the rx8 alloys in my mps, the grin factor was epic in that too but I will not be touching another MPS or rx8 with a barge pole. MPS suffers from timing chain and already damaged countless engine blocks lol. And the RX8 rotary engine is so fussy that you can't do a cold start and turn it off immediately after. I think Diesel is false economy unless you're doing over 10k a year because servicing is more expensive but turbo replacement cost is high. Said that my i-Shift sometimes puts car in N when slowing down so I think clutch is it's way out 😬

Sent from Tapatalk
Tanim is offline  
Reply

  Civinfo > 8th Generation Euro Honda Civic (2006 - 2011) > Engines and Transmission

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Civinfo forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Your User Name is the name that appears by all your posts on the forum, and so should not be your email address.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
1.8 i-vtec sweet spot aka best fuel economy rpm/mph xavier2007 General Discussion 18 15th November 2014 19:40
Fuel Bad economy causes THABASS2DARK Engines and Transmission 15 16th November 2011 12:39
Fuel Bad fuel economy with automatic gearbox dinke Engines and Transmission 9 28th September 2011 21:13
MPG Bad Fuel Economy With a 1.4 - Comp Vs Actual civicCivic Engines and Transmission 16 9th May 2010 01:37
MPG i-vtec economy.. kevin_lufc Engines and Transmission 96 15th July 2008 10:27

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome