Author Topic: The Mazda 3 Fuel Economy Thread  (Read 215319 times)

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Offline mart_haj1986

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Re: The Mazda 3 Fuel Economy Thread
« Reply #780 on: July 20, 2017, 03:22:08 PM »
Cheers Steven,

That put's my mind at rest a little :)

My traffic is very much stop/start at the beginning and end of my journeys and we have the big family Mazda 5 for the longer journeys, so mine is only ever really used for the shorter journeys.
I think I saw on another of your posts a while ago but cant remember, What tyres are you running?
Martin H - Nuneaton, Warwickshire UK

Online StevenRB45

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Re: The Mazda 3 Fuel Economy Thread
« Reply #781 on: July 20, 2017, 04:41:57 PM »
Got a set of Goodyear efficientgrip performance. Tbf overall average probably has gone up by .5 mpg since I got them. But it's probably a little better than that as its dragging up a 2 year average.

Offline Engineer Andy

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Re: The Mazda 3 Fuel Economy Thread
« Reply #782 on: July 30, 2017, 11:16:21 AM »
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.

I get about the same (average about 1mpg higher at around 41.5mpg brim-to-brim method - mine being a saloon may make a marginal difference compared to an equivalent hatchback version) in my 1.6 petrol - interesting that you use super unleaded - have you noticed any difference in mpg and/or performance whilst using it?  I wasn't sure whether the standard older models (i.e. not the MPS) would benefit from it other than perhaps lower emissions (cleaner burning of the fuel) and cleaning the inside of the engine (say using Shell and other 'brand' fuels that have cleaning additives, as opposed to supermarket fuels which don't).

For me, it was difficult to know how much of a difference (other than the engine sounding a bit quieter/smoother) the big 6th year service made, as my mileage varies per year quite a lot due to changes in jobs/workplaces (difficult to compare).

Online StevenRB45

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Re: The Mazda 3 Fuel Economy Thread
« Reply #783 on: July 30, 2017, 12:47:43 PM »
I don't have any numbers on this car I've always run it v power, my previous 1.5 Suzuki improved by about 2.5 to 5% when I switched over. Willpower does have numbers on his that improve/get worse when he changes between the 2.

In all honesty I wouldn't hand on heart say it makes much of a difference but given the difference in cost is about 2 quid a week it's not breaking the bank. If I ever find myself short of 2 quid a week...then I'd probably switch the a.c. off instead.

Got it back from the year 6 on Friday seems to be running very nice indeed, shall see if it gets any better.

Offline Engineer Andy

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Re: The Mazda 3 Fuel Economy Thread
« Reply #784 on: August 06, 2017, 03:28:33 PM »
I don't have any numbers on this car I've always run it v power, my previous 1.5 Suzuki improved by about 2.5 to 5% when I switched over. Willpower does have numbers on his that improve/get worse when he changes between the 2.

In all honesty I wouldn't hand on heart say it makes much of a difference but given the difference in cost is about 2 quid a week it's not breaking the bank. If I ever find myself short of 2 quid a week...then I'd probably switch the a.c. off instead.

Got it back from the year 6 on Friday seems to be running very nice indeed, shall see if it gets any better.

Gave my car an 'Italian tune up' yesterday and have bought some Redex fuel injector cleaner additive (4-dose bottle) to use over the next month or so.  I'm also thinking of using Shell SuperUnleaded as well, especially as I haven't being doing much driving for the past few months (gave up my job/thinking about a career change, so no commute and only a 25 mile round trip once a fortnight to keep the car battery and running gear going ok), but will be going down to the West Country on holiday soon, which should give my car a very nice workout and put up to 1000 miles on the clock over the fortnight, equal to about 2-3 fillups of fuel.  On the same trips before I've managed to get 45mpg+ out of the car, so I'll see what difference both the additive and using (where possible) Shell SU (with its extra additives) over the period.

Obviously there may be variations due to where I might drive to whilst I'm there and road conditions (day/night driving, weather, traffic, etc), but it'll be interesting to see what (if any) difference they make on an older standard car (i.e. not a turbocharged MPS or more modern direct-injection engine with a knock sensor) which has been well-maintained.  The Redex may not make much of a difference in max. power available, but from looking up tests done by many (see YouTube), they can help make power delivery smoother over the rev range of each gear, perhaps helping older performance cars regain some 'lost' power.  I'll let you guys know how I get on around the middle of September.

Offline Willpower

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Re: The Mazda 3 Fuel Economy Thread
« Reply #785 on: January 14, 2018, 09:45:21 AM »
I was chatting with the sales staff in my local dealer on Friday and allegedly there are plans for world wide legislation to make manufacturers actually do real life mpg readings. Exactly what is involved I can't say, or what body would be overseeing the results. But it would mean testing a car as it would be driven on the road. Not stripped down on a carefully prepared track. 

That would prove interesting
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Offline zoomzoomer

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Re: The Mazda 3 Fuel Economy Thread
« Reply #786 on: January 14, 2018, 12:26:33 PM »
Good to hear, common sense at last. I am more than happy with my new cars mpg of 36 in winter and that's with a lot of stop start driving.

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Re: The Mazda 3 Fuel Economy Thread
« Reply #786 on: January 14, 2018, 12:26:33 PM »