Author Topic: The Mazda 3 Fuel Economy Thread  (Read 268628 times)

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Offline E.T.

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Re: The Mazda 3 Fuel Economy Thread
« Reply #765 on: September 28, 2015, 07:15:02 PM »
Just done a 240 mile round trip. 

Main a roads going, basically  A120, A507 and roundybouts across Milton Keynes A414 Average going 52mpg

On the way back, all motorway / dual  M40, M25, A12  Exactly 50mpg

Both ways were off peak, but still heavyish flowing traffic.

(this is after the remap by BBR, so 120bhp --> 170bhp + better fuel economy (was averaging 45mpg before this)
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Offline bobmax

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Re: The Mazda 3 Fuel Economy Thread
« Reply #766 on: March 14, 2017, 02:23:46 AM »
Just wondering if the fuel reading on the computer dash is close to the actual usage? :-\
I haven't actually done a tank to tank reading yet.
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Offline misar

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Re: The Mazda 3 Fuel Economy Thread
« Reply #767 on: March 14, 2017, 09:38:24 PM »
Just wondering if the fuel reading on the computer dash is close to the actual usage? :-\
I haven't actually done a tank to tank reading yet.

With my Gen 2 the computer long term average is 1 or 2 mpg better than my long term tank to tank average. A spot test on one filling may not be a good guide either way. Unless you drive VERY carefully either value will be far away from Mazda's claims.

Offline bobmax

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Re: The Mazda 3 Fuel Economy Thread
« Reply #768 on: March 15, 2017, 01:15:22 AM »
Just wondering if the fuel reading on the computer dash is close to the actual usage? :-\
I haven't actually done a tank to tank reading yet.

With my Gen 2 the computer long term average is 1 or 2 mpg better than my long term tank to tank average. A spot test on one filling may not be a good guide either way. Unless you drive VERY carefully either value will be far away from Mazda's claims.

I'll get round to a tank to tank one day :D
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Offline yarb

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Re: The Mazda 3 Fuel Economy Thread
« Reply #769 on: March 15, 2017, 08:20:12 AM »
My tank to tank over 20000+ miles is about 2 mpg less than the one shown on by the computer my tank to tank is 42.5
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Offline 185sport

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Re: The Mazda 3 Fuel Economy Thread
« Reply #770 on: March 15, 2017, 01:27:10 PM »
Over 65K miles and 158 brim to brim refuelings the on-board computer on average shows just over 3 mpg better than the pump readings.

Currently I'm averaging 44.7 MPG by pump readings.
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Offline bobmax

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Re: The Mazda 3 Fuel Economy Thread
« Reply #771 on: March 15, 2017, 01:32:27 PM »
The computer reading can be a bit confusing.
I'm currently on 43.8 MPG at the moment, but went to kent (from Hampshire) a couple of weeks ago and it went up to 55MPG :o
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Offline yarb

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Re: The Mazda 3 Fuel Economy Thread
« Reply #772 on: March 15, 2017, 01:57:24 PM »
The computer reading I was referring to is the average at the bottom of the screen which I reset at the beginning of each year (forgot this year) not the average showing for one trip, mine hit 60MPG the other night mainly because I came out of the restaurant and drove for 25 miles without stopping or accelerating apart from turning onto the road and leaving the 30MPH zone
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Offline tylerdurden82

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Re: The Mazda 3 Fuel Economy Thread
« Reply #773 on: May 29, 2017, 08:52:56 PM »
Just achieved 50 mpg out of my petrol 3.  Doing a lot of motorway driving at 60 miles an hour (with air con on in hot weather) and anticipating road conditions.

I don't need a diesel with that sort of economy.  The key is regular oil and filter changes.  I get mine changed every 6k miles.

Offline RX8 Loon

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Re: The Mazda 3 Fuel Economy Thread
« Reply #774 on: July 19, 2017, 11:32:43 AM »
After 7 years, 3 months and 92k miles of ownership I'm getting best ever results out of my car. OK, I'm doing a 240 mile round trip every week with 90 miles city driving in between. I'm now getting as high as 53miles to the gallon on a brim to brim fill (OBC said 56mpg), and got my first ever 500+ mile tank. The DPF passive regen seemed to kick in every 180-210 miles, but now looks like this is stretching to 220-250 miles and if I time it right on one of the longer runs it only seems to last about 10 miles.

Must be loosening up a bit ;)
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Offline bobmax

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Re: The Mazda 3 Fuel Economy Thread
« Reply #775 on: July 19, 2017, 11:46:12 AM »
After 7 years, 3 months and 92k miles of ownership I'm getting best ever results out of my car. OK, I'm doing a 240 mile round trip every week with 90 miles city driving in between. I'm now getting as high as 53miles to the gallon on a brim to brim fill (OBC said 56mpg), and got my first ever 500+ mile tank. The DPF passive regen seemed to kick in every 180-210 miles, but now looks like this is stretching to 220-250 miles and if I time it right on one of the longer runs it only seems to last about 10 miles.

Must be loosening up a bit ;)

Yes, Diesels do loosen up and give better results in time.
My last Diesel motor  did  8)
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Offline StevenRB45

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Re: The Mazda 3 Fuel Economy Thread
« Reply #776 on: July 19, 2017, 07:02:23 PM »
Well after 3 years i'm getting 36-39 winter and 40-45 mpg summer in my 1.6 petrol. Average overall measured tank to tank is 40.3mpg. Most it's ever done on one tank is 421 miles bit usually it's more like 360 to the 380.

Be interesting to see if it goes up at the end of the month, given it's got it's year 6 service so the factory spark plugs will be renewed along with the 3 year old air filter and new oil.

Offline mart_haj1986

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Re: The Mazda 3 Fuel Economy Thread
« Reply #777 on: July 20, 2017, 08:56:41 AM »
Thanks Steven, If you don't mind me asking what sort of driving are you doing?
I seem to only get around 30Mpg travelling 16 miles a day, with mainly town driving and a 3 mile (each way) jaunt down a dual carriageway.
« Last Edit: July 20, 2017, 09:03:08 AM by mart_haj1986 »
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Offline yarb

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Re: The Mazda 3 Fuel Economy Thread
« Reply #778 on: July 20, 2017, 12:54:04 PM »
Biggest thing is IStop when traveling in towns, mine this time of year is kicking in with the first 1/4 mile at the end of the road. typical work trip is stopped 5+ minutes and IStopped for about 4Mins 50secs. In winter it can be IStopped for only 2+mins so wasting petrol stopped.  Averaging about 45mpg at the moment with a 9 work trip each way
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Offline StevenRB45

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Re: The Mazda 3 Fuel Economy Thread
« Reply #779 on: July 20, 2017, 02:24:43 PM »
Thanks Steven, If you don't mind me asking what sort of driving are you doing?
I seem to only get around 30Mpg travelling 16 miles a day, with mainly town driving and a 3 mile (each way) jaunt down a dual carriageway.

Distance wise my daily mileage is similar 6 to 9 miles each way anywhere between 15 mins and 25 depending on route and traffic conditions. Commuting is a mixture of a and b roads with a about 2 miles of 50mph dualcarriageway. Due to shift rotation I only sit in traffic one week in 4 though.

Also whenever me and the OH are off we'll be away for a jaunt somewhere and 1 to 2 hours on cruise at 70 will usually put the average for that tank safely above 40.

That and I run on 99 octane and have pretty much the lowest rolling resistance set of 205 17s you can get that will still stop and steer.
« Last Edit: July 20, 2017, 02:34:34 PM by StevenRB45 »

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Re: The Mazda 3 Fuel Economy Thread
« Reply #779 on: July 20, 2017, 02:24:43 PM »