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Highest ever MPG?

4.2K views 75 replies 24 participants last post by  rovertaken37  
#1 ·
I took the missus to Birmingham to look at a car last weekend, so the car had a decent motorway blast. I thought i'd check the MPG afterwards as it seemed like a fairly frugal tankful.

It worked out at 498.4 miles to 40.16 litres, a record for me.

This got me thinking, what is the highest MPG *over a tankful* people have recorded? Probably more of a question for our diesel owners, but i thought i'd throw it to the 200/25/ZR crown in particular as we have the same sized fuel tanks. Plus there was a foreign member on here recently with much higher MPG than this from a ZR160... somehow!
 
#18 ·
During the week I typically don't make trips longer than 3 - 4 miles between turning the engine on and off again... and I've calculated mine at 23mpg... which is abysmal - especially for a 1.1litre engine.

I suppose its down to the fact the engines not given a chance to warm up :/
 
#15 ·
surely by that maths you should easily get 500 miles per tank?
that's nearly 11 gallons so at 55mpg you should beat 600 tbh

but you can only get 42l in?interesting....
It's like there is another 8L in the tank, but you can't seem to "suck it up" for some reason. Lots of people report the same sort of behavior, the gauge can read below the red and the can literally run out. Still never get the full 50L in.
 
#36 ·
i have to noticed this, if i as pootling along and then put my foot down my fuel guage goes down a tad and goes back up again when i ease off, well a bout 5 mins after i ease off.
best ive ever had from my rover 25 td is 52mpg. that was on a long run up to newcastle. my usual is about 40-45mpg.

worst ive ever had was 32mpg and that was loads of short runs and alot of foot to the floor stuff.
 
#39 ·
Will advise...
havent done any math yet as im not finished. I put in my tank on saturday ÂŁ51 until it clicked on the pump.
It did take the gauge to the top so i reset my clock. I drove back from Great yarmouth and so far i have Done 238 miles and the gauge is just under halfway so im guessing i should pull off 400 miles
 
#41 ·
I defiantly agree with the whole guage is a guide idea my old 400 used to drop a quarter just going up a steep hill if it was half full on level ground shocking!!

I did manage Atherstone to Manchester and back on ÂŁ20 once in my old ZS 180 god knows how! That included getting lost in manc city centre as well lol
 
#42 ·
39mpg would be my best, drove from Barnstaple, up along the coast, then M5 and M6 and A69 home; filled up just onto the M6 and that tank was what I did the calc on. Epic drive, hell of a way I'd gone for an interview for a job I didn't get.

I tend to get 33/34 mostly. Dismal figures really, but then I remind myself I'm driving a 1.8 petrol, on rural roads, where my mum's 54 plate Megane 1.9dci only got 39.6mpg.
 
#46 ·
I brimmed mine the other week. Cost about ÂŁ52.
So with a 50 litre tank, that's 11 gallons into a Rover 25.

Today, the trip meter was on 316 miles, with roughly an 1/8" of a tank left.
So that's around 33 miles to the gallon, pretty bad by todays standards.
90% of my journeys are on the motorway, averaging 65~70mph.

I'd feel happier if the Rover could manage 40 mpg.

Added another ÂŁ20 worth this afternoon at ÂŁ1.37 a gallon.

I.
 
#54 ·
To the people who get stellar MPG out of their R3, can you post a bit about your daily commute / style of driving please? The is probably more relevant to the diesel owners tbh.

I'm quite interested in the common "i drove it really carefully and got worse mpg" syndrome that diesel owners report.
 
#62 ·
I remember reading over on ecomodder something about not loading the engine - changing gear lower can be worse since the engine pumps a lot of fuel in to make up the difference. I notice it a lot since my MAF is damaged I have to choose whether to almost red line it in one gear or put my foot down in a higher gear before the turbo kicks in when joining motorways and such.

I much prefer just driving just on the boost, I seem to use a lot less fuel, but since our diesels aren't too good up to 40 I have to do the above and it sucks! I wish people weren't so pushy on the motorway then I could really achieve an awesome MPG.
 
#55 ·
I can only comment on our diesel pug, but, yes, driving 'really carefully' gets worse average mpg (52ish) compared to driving 'normally' (keeping it between 1.5-2.5k rpm = 55+mpg average). It likes to stay in the boost zone (what little boost you get from the turbo on it!) very much, and everything(drivability, power, economy) benefits from this. Our 207 also has a 50 litre tank (and i've only ever got 45 into it, even when the trip computer thingy told me I had 2 miles of fuel left!), and I get 500 miles minimum every time. :broon:

Thinking of 'real' fuel for a moment :)dddc:), I have found that on a decent motorway journey certainly, both our VVC MGF, and the 25 GTi will get 400 miles from a tank without much trying (got a 430 out of the F once!), where the only time I managed 400 miles out of a tank in my 1.4 ZR was by cruising at 60, slipstreaming lorries! :lol: Normal driving (round town, my 5-mile commute, that kind of thing), however, i'd be lucky to see 300 out of any of them.
 
#56 ·
I can only comment on our diesel pug, but, yes, driving 'really carefully' gets worse average mpg (52ish) compared to driving 'normally' (keeping it between 1.5-2.5k rpm = 55+mpg average). It likes to stay in the boost zone (what little boost you get from the turbo on it!) very much, and everything(drivability, power, economy) benefits from this. Our 207 also has a 50 litre tank (and i've only ever got 45 into it, even when the trip computer thingy told me I had 2 miles of fuel left!), and I get 500 miles minimum every time. :broon:

Thinking of 'real' fuel for a moment :)dddc:), I have found that on a decent motorway journey certainly, both our VVC MGF, and the 25 GTi will get 400 miles from a tank without much trying (got a 430 out of the F once!), where the only time I managed 400 miles out of a tank in my 1.4 ZR was by cruising at 60, slipstreaming lorries! :lol: Normal driving (round town, my 5-mile commute, that kind of thing), however, i'd be lucky to see 300 out of any of them.
Interesting contribution, thanks. Your diesel comments pretty much confirm my initial suspicions on diesel "eco driving".

If you are given a straight road with no traffic, slowly tootling through the gears with minimal revs up to the limit seems less fuel efficient than just getting your boot down a bit (within reason) and getting up to cruising speed.