Highest Reallife MPG Diesel / Petrol you've driven?

[Sc0tchland]

Just a thought, what's the highest MPG car you've driven? I had a Passat with high 60's once but I've heard of people well into the 70's?!

[A900ss]

I guess that’s just one trip and using the OBC?

I averaged 58 MPG over 10k miles in a C220d (including using winter tyres that brought the MPG down).

https://www.spritmonitor.de/en/detail/849046.html

[Trophy Husband]

I worked with a guy who had a 2013 Honda Civic 2.2cdti. He was a hypermiler and achieved mid 90's regularly. Bear in mind he was drafting trucks on motorways and getting nowhere fast! He was mad for it.

[Mikebentley]

2013 Fiat Panda Trekking diesel with Mud and Snow Continentals. 74mpg over 15000 miles. I did the hyper miling thing in it once and saw 90mpg over a few days but it wasn’t any fun and frankly potentially dangerous.

[Crusoe]

F30 320ed with 8 speed Auto and 16in wheels, done 100k with a 64mpg lifetime average. Easy to get 70s on a longer run and 80s mpg if you are trying (ie. sticking 65mph on a long motorway drive)

[CornedBeef]

I had a 206 1.4 hdi in my teenage years, which during a drive down to the south of France hit a MPG in the 70s! It was £30 a year tax too.

But it also ate suspension bushes at an alarming rate and the fuel lines went porous just outside of its warranty!

[mmm-five]

My Alfa 147 JTDm only returns 47mpg on my spirited 500 mile weekly commute...but then it's not sitting at 70mph or drafting trucks

I bought the diesel to save money vs the full tank of petrol I was putting into the M every 300 miles.

[Old Merc]

My Merc` C270 CDI regularly shows high 50`s, on one recent long trip cruising at 60-70 mph it showed 61.5 mpg.

[bobtail4x4]

I often get into the 70 mpg plus club in the A3 2litre tdi.keeping within the limit but makeing progress,

this was as I handed the last one back,
a gentle run up the A1, at 70 mph, had to hand it back at 12.30 so put the cruise on.

[markirl]

Honda Jazz is spectacularly economoical, always get 55+ mpg whenever I borrow it.

[Dinoboy]

Won't be the highest here but I'm amazed at the 52.8 average over nearly a thousand miles the 2018 730d hire car I have while my 2013 730d is in for its egr replacement. It's a good 10mpg better as an average than my car.

[Matt-il77s]

Mikebentley said:

2013 Fiat Panda Trekking diesel with Mud and Snow Continentals. 74mpg over 15000 miles. I did the hyper miling thing in it once and saw 90mpg over a few days but it wasn’t any fun and frankly potentially dangerous.

I got this in a 1.3D Fiat 500L, same engine?

[MrGTI6]

I was quite impressed with this from a Peugeot 307 SW (2.0 HDI 136). Kent to Cardiff and back, seven up, mostly at 80mph in 6th.

[Magnum 475]

Can squeeze 54 mpg out of my E220CDi cruising at around 70mph. Average over the 91000 miles I’ve covered since buying it is 45.

Rarely see more than 30 mpg from my 987S, even cruising gently.

And my wife’s 220i Active Tourer is shocking - real world mpg is around 25 across mixed driving, way below claimed figures. Have even had it checked by BMW to make sure there’s nothing wrong, but seems it’s just more thirsty than BMW official figures claim.

[youngsod]

Cheating I know, but our Gen 4 Prius is currently showing a lifetime average of 62.3mpg and that's over 13k miles. It still amazes me how little fuel it uses without having to resort to using bunker fuel.

[donkmeister]

I get a lot of Merc A180 and A200 diesel hirecars, I find they will return around 62mpg on a decent motorway run even with the M25 thrown in.

Notable mention has to go to the Focus-sizef Seats with the petrol engine that can switch to 2-cylinder running. I regularly averaged high-50s on a decent run with that engine and a DSG box. The trick seemed to be to set cruise at 70, no higher, or the four-cylinder mode would kick in on every incline.

Hypermiling... Well I averaged 38-39 out of my Mercedes E500 when I tried it for a laugh and I was keeping a safe distance when drafting lorries (so probably not drafting in the eyes of a hypermiler). Not bad for 1.7 tonnes of Teutonic V8, mine doesn't have the cylinder deactivation that I understand newer Merc v8s have.

ETA all of the above is from fill-up to fill-up, not OBC.

[clockworks]

My last small car - Panda 1.3 diesel with well over 100k on the clock - averaged just shy of 70mpg on local journeys.

Current small car - 2016 Skoda Citigo - is managing a true 62mpg, measured brim to brim. Pretty good for a petrol car that's mostly used for local trips of under 10 miles.

The one that impressed me the most though was my first diesel company car - a 2004 Vectra 1.9. It averaged around 52mpg over 3.5 years and 120k miles, boot and back seat full of computer spares. A bit of a revelation after having similar-sized petrol cars that struggled to crack 35mpg even when driven carefully.

[Speed1283]

My trusty old Bora TDI (remapped to 170bhp) used to sit well into the 60s without trying.

My recent z4 coupe used to get 41mpg on a long run at 70mph.

My current car (640d) has recently managed 57mpg on the way into work (33 miles) going with the flow (steady but not hypermiling) but the average is closer to 45mpg...

[caelite]

My old mk1 Fabia VRS. Typically got mid 50s on a motorway run, could get it up to 60s if I drove like a nun. Amazing numbers for something that was a hoot to drive too.

[Mike335i]

I had about 75mpg when hypermiling my old 2.0 diesel Kia C'eed once, but in reality I stopped caring years ago. I'm happy with 25+ these days