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Mazda 3 / Re: The Mazda 3 Fuel Economy Thread
« Last post by Engineer Andy on August 03, 2021, 02:44:37 PM »
Driving style and where you drive will always be more important than pretty much anything else in fuel economy.

I've never managed figures as high as yours to be fair..though my old 1.6 did register 50 mpg travelling from Newcastle to York due to multiple 50 mile an hour limits wlth average speed cameras.

But my normal motorway is 42mpg..normal round the doors is 37-39 long trip mpg is 43-45 in national limits rather than cruising at 70ish.

Do find my computer to be quite close, calculated brim to brim is currently 40.1 over 52k miles.

Similar experience to what I've got over the years with my gen-1 saloon (which has a very smaller benefit over the hatch due to the slightly more aerodynamic shape).  I recall getting very good mpg on my 2019 holiday to Cornwall, mainly because at the time, large swathes of the M4 and especially M5 were being reconfigured/resurfaced and had long sections of 50mph limits policed by average speed cameras, and I drove a long way on them (the traffic was freely flowing as well), including back up the M5 (and back again) during the holiday to Tauton to watch a cricket match.

I think it also helped that the weather wasn't overly warm either (but not cool in the evenings), so not much A/C was needed, helping improve the car's mpg.
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Mazda 3 / Re: The Mazda 3 Fuel Economy Thread
« Last post by StevenRB45 on August 02, 2021, 08:45:39 PM »
Driving style and where you drive will always be more important than pretty much anything else in fuel economy.

I've never managed figures as high as yours to be fair..though my old 1.6 did register 50 mpg travelling from Newcastle to York due to multiple 50 mile an hour limits wlth average speed cameras.

But my normal motorway is 42mpg..normal round the doors is 37-39 long trip mpg is 43-45 in national limits rather than cruising at 70ish.

Do find my computer to be quite close, calculated brim to brim is currently 40.1 over 52k miles.
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Mazda 3 / Re: The Mazda 3 Fuel Economy Thread
« Last post by ColinW on August 02, 2021, 08:08:50 PM »
Its interesting to compare to my former car, 2015  Astra 1.6 Sri, a fairly modest,  underpowered car IMO.
I could regularly achieve 50mpg  over a period (summer only,  computer calculated, not brimming method) but I'd have to drive like a saint.  Most Astra owners get nowhere near that.
51mpg in the Mazda was achieved with a fairly reserved driving style but equally, an occasional splurge of more 'normal' driving.
To get any more than 51, I think is going to be fairly difficult or require motorway mileage on long trips.

I did wonder...as the onboard fuel economy app takes it's time to boot up sometimes (and weirdly sometimes not), , does that skew the figures, missing out the startup and initial acceleration phases that use a lot of fuel.  But maybe not then,  given computer and actual figures are really quite close.
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Vehicle Entertainment / Navigation Systems / Navigation difficulty
« Last post by EWT on August 02, 2021, 05:00:49 PM »
Have a TomTom for my mx5. My MX5 bought in 2016 in the days when you could buy a Mazda without the infernal and expensive Mazda Navigation system.

TomTom so so easy to work. On the other hand I find the Mazda Navigation so difficult to use.

Every time I want to enter a destination in our Mazda3 I have trouble. Latest problem is getting a route to a Hospital some 23 miles away. Can get a road near it but not the hospital itself.

Keep reading about how brilliant the Infotainment & Nav Mazda system is, but this navigation system just drives me nuts every time I try to use
it.

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Members Gallery / Re: Martha the Takuya
« Last post by StevenRB45 on August 01, 2021, 11:06:52 PM »
I remember Martha joining the forum. Glad to see she is still with us.  :)

Oddly enough so do I! Time flies when you're having fun apparently.

Didn't plan to have it this long...but it's just so damn useful and not really worth trading in for a pittance so might as well ride it out to the end when it'll probably end up being replaced by an electric car.

Shame the rust is advancing but it's not a mint low mileage virgin by any stretch of the imagination and it'll never be a "classic" so spending chunk of money sorting the underside out doesn't really make sense other than for sentimental reasons.
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Mazda 3 / Re: The Mazda 3 Fuel Economy Thread
« Last post by Engineer Andy on August 01, 2021, 08:50:04 PM »
So, 2018 Sport Nav 2.0 petrol, feel free to correct any of my calculations...
Brimmed the tank, drove the car, a mix of town, mostly 60mph roads and occasional 70mph motorways, a fair cross section but I do drive for economy most of the time.

At 426 miles (with 70 miles still left on the computer...so say 35 in reality, I can get over 450 to the tank.
Brimmed it again, £50.32, 37.5 ltr or 8.24 gallons
426 ÷ 8.24 =51.59 actual mpg
Computer showed 52.5 mpg average so reasonably close to reality in my case.

11.8 p per mile, so each 30 mile commute costs IRO £3.50

As an aside, I reset my computer one day en route to work, a 60mph road.  I did around 10 miles and the average showed up at 62mpg.  That doesnt include start up, acceleration...so perhaps when you see the manufacturers figures quoted, you need to think that's what you can best achieve when you're actually rolling at those speeds and disregard the start up, acceleration  which inevitably brings the headline figure down.

Decent real-life figures showcasing the significant improvement in mpg between the 'old' port-injected petrol engines of the gen-1 and 2 cars and the Skyactiv-G ones in the gen-3 and 4 cars - you achieved (seemingly on a similar diriving pattern to mine) around 25% better mpg with an engine that is 20% more powerful in a heavier (albeit sleeker-shaped) car.  The Skyactiv-G engined cars regularly get nearer to the claimed mpg (unless driven 'spiritedly') than many other makes.  Their diesel equivalents don't fair so well though.
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Members Gallery / Re: Martha the Takuya
« Last post by Willpower on July 31, 2021, 10:33:11 PM »
I remember Martha joining the forum. Glad to see she is still with us.  :)
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Mazda 3 / Re: The Mazda 3 Fuel Economy Thread
« Last post by ColinW on July 31, 2021, 09:31:14 PM »
So, 2018 Sport Nav 2.0 petrol, feel free to correct any of my calculations...
Brimmed the tank, drove the car, a mix of town, mostly 60mph roads and occasional 70mph motorways, a fair cross section but I do drive for economy most of the time.

At 426 miles (with 70 miles still left on the computer...so say 35 in reality, I can get over 450 to the tank.
Brimmed it again, £50.32, 37.5 ltr or 8.24 gallons
426 ÷ 8.24 =51.59 actual mpg
Computer showed 52.5 mpg average so reasonably close to reality in my case.

11.8 p per mile, so each 30 mile commute costs IRO £3.50

As an aside, I reset my computer one day en route to work, a 60mph road.  I did around 10 miles and the average showed up at 62mpg.  That doesnt include start up, acceleration...so perhaps when you see the manufacturers figures quoted, you need to think that's what you can best achieve when you're actually rolling at those speeds and disregard the start up, acceleration  which inevitably brings the headline figure down.
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Members Gallery / Re: Martha the Takuya
« Last post by StevenRB45 on July 31, 2021, 08:56:20 AM »
Mot passed, Freshly serviced 480 quid lighter as they did the spark plugs (which weren't due).

Although with it came advisories for underbody corrosion on the sills and suspension mounts.

Now none of that is news to me, to be honest but I think we're on target for 13-16 years before it's uneconomical to keep.

However...I'm not concerned I feel like I've definitely already got the use I paid for out of it. If it died tomorrow and was worth 0 it's cost me 1200 quid a year which to put it in context the C3 when it was on PCP cost 3 grand a year in monthlies.

But it is unlikely to die tomorrow..so instead it'll continue to be a useful thing to have about

Here it is doing what it does at Centre Parcs..

3 hours on the motorway no bother at all fully loaded up.
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Mazda 3 / Re: Speed awarness
« Last post by deanparkr on July 21, 2021, 11:01:26 PM »
Yes this is a very frustrating restriction. It would be much better if we could configure it to beep once and then have the dash indicator pulse orange.

Because it keeps beeping and very occasionally might not pick up a traffic sign on rural roads I turned it off and just use the visual indication on dash and HUD.

However in terms of keeping to the speed I want, I find using CTS & MRCC very useful. On a motorway I set the speed I like, if there is variable speed limit or over head signs show reduced speed I just change the target speed down. Around town if there is a speed camera alert I just turn on CTS and it keeps the car at that speed exactly.

CTS not always practical though on town roads as it rides the brakes if you go down a hill, but is useful in traffic or if you want to ensure speed limit is not exceeded in certain areas.
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