Real life mpg petrrol and diesel

[DeanC]

Exactly right buddy. I should have mentioned that you will find smaller engines are happier getting up to speed - they just work harder to maintain it.

The whole rpm thing is a generalisation to make it explainable to the masses. People who get really bad economy from diesels are often trying to keep their revs under 1.5k or something daft where their engine is least efficient.

 

[gaffer1986]

I just watched that video and must say I'm quite surprised. May explain why the 1.0 liter eco boost in the focus struggles on the motorway and why Mazda has opted to use bigger normally aspirated petrol engines to be more economical in the new Mazda 6 and 3.

I was assuming my previous posts because of the law of conservation of energy which claims energy cannot be created, destroyed but can only be changed. But different internal combustion engines must have different inefficiencies and whether the car is economical round town or on the motorway is dependent what inefficiencies a particular engine has.

Roll on good batteries and electric cars that are 90%+ efficient.

 

[Fraczish]

I am taking a trip down to Cornwall on Sunday so will post my figures for a 250 mile round trip 50% motorway 50% fast moving A30, hoping for at least 45mpg

Ok back from Cornwall and here is what the 1.4tsi managed, I should point out that I live approx two miles from the motorway and my mate in Cornwall lives about 1/2 from the A30 so this route was purely extra urban driving conditions.

I refuelled before the trip down. I had a clear run in decent conditions and very little tradfic , had the CC set to 70 all the way here is what it achieved..


(It was slightly more than shown about 49mpg as I forgot to take the picture when I got there, it was taken when the car was cold this morning)

So on the trip home I decided to see what difference setting the CC to 65 would make, here are the return figures..



Which gave this for the round trip...



Think its worth pointing out the the two trips driving conditions were practically identical frustratingly right up until 8 miles from home where traffic slowed to a crawl. I took a diversion and completed the remains in urban condotions (the figures had been showing 56.7)
Massively impressed considering its only got 500 miles on the clock and will certainly be cruising at 65 more often!

 

[Dudders07]

Can't wait to get my hands on my new leon. Currently only getting 29 mpg out of my focus st170 and that's even driving like an old granny!!

 

[DeanC]

That's awesome going!

 

[Fraczish]

I thought so.. It's a journey I have taken about 4/5 times a year and blows the S-Max deisels 44mpg (indicated) out the water. Very pleased with those figures from such a spritely little petrol engine!

 

[gaffer1986]

That's the same economy I get from my Ibiza 1.6 TDI at the same speed. Can't wait to get my 1.4 TSI.

 

[gaffer1986]

Did you put a full tank in before the journey? I noticed it says 85 miles left after 256 miles, at 52mpg that would only take 6.55 gallons of fuel, the Leon has an 11 gallon tank. Obviously it won't calculate the remaining fuel based on emptying the tank, but I doubt it would leave more than a gallon in the tank before the computer says 0 miles remaining.

So either the tank wasn't full or the computer is telling lies.

 

[Fraczish]

No I didn't fill the tank, I had about 140 miles left and I just threw in £20 before I left for Cornwall... I know the figures the computer are always optimistic but its still very impressive imo

 

[DeanC]

As good or better than most 5 year old + diesels with the same power. Really impressive.

 

[gaffer1986]

As good or better than most 5 year old + diesels with the same power. Really impressive.

Same as my 3 3/4 year old diesel, driven gently with only 105 PS.

 

[DeanC]

The 1.6TDI CR has got to be 5 years old by now.

There has been a big step change in the last 3 years or so and vag have only just caught up with bmw, mercedes and the french with this latest EA288 range (still maybe a bit behind with no twin turbos mind)

 

[gaffer1986]

That's true, the first 1.6 TDIs went on sale early 2009, doesn't seem like that long ago though, been nearly four years since my car arrived. I ordered it October 2009, got it
01/03/10.

VAG always seem to be behind with new engine tech, but rarely seem to lag in terms of capability. The old PD engines were a match for the CR engines in terms of economy until EU5 required DPFs. My old friend had a 1.6 8v mk4 golf when I had a 1.6 16v Astra, they had the same power despite the extra valves in the vauxhall.

When the EA211 engines have such great low down torque, I can't see the point in twin turbos.

 

[DeanC]

When the EA211 engines have such great low down torque, I can't see the point in twin turbos.

You're right but I was thinking for the bigger engines.

VW have confirmed a twin turbo 2.0tdi which is rumoured to power a GTD R and S3 TDI at some point.

 

[labmousee]

Hey guys, I am little concerned about my fuel consumption. I have 1.8 TSI DSG with Start-Stop and I am using the Eco mode, which means that the Inertia mode is enabled as well. Most of the days I drive about 5km (3.1mi) to work and another 5km back. I drive through the city and one way trip takes 20-35 minutes including stops and looking for a parking spot.

As you can see, after driving 190mi this way ( with few exceptions ) the consumption is crazy 22.41 mpg (imp.). Does that make sense?

(Ignore the km left because I took the photo while I was refueling).

When I drove about 435 mostly on he highway and partly through the mountains, I had 39.8 MPG. (Individual mode, sports wheel, Eco engine, no Inertia).
Does that look normal to you? Anyway else has similar results? Any suggestions how can I be sure that I don't have a real problem?

 

[gaffer1986]

Hey guys, I am little concerned about my fuel consumption. I have 1.8 TSI DSG with Start-Stop and I am using the Eco mode, which means that the Inertia mode is enabled as well. Most of the days I drive about 5km (3.1mi) to work and another 5km back. I drive through the city and one way trip takes 20-35 minutes including stops and looking for a parking spot.

As you can see, after driving 190mi this way ( with few exceptions ) the consumption is crazy 22.41 mpg (imp.). Does that make sense?

(Ignore the km left because I took the photo while I was refueling).

When I drove about 435 mostly on he highway and partly through the mountains, I had 39.8 MPG. (Individual mode, sports wheel, Eco engine, no Inertia).
Does that look normal to you? Anyway else has similar results? Any suggestions how can I be sure that I don't have a real problem?

Sounds low but with an average speed of 15 km/h with a cold engine I'm not surprised. Although I can't talk with experience of this car as I haven't got mine yet.

Sent from my HTC One S using Tapatalk

 

[gaffer1986]

Saying that, I got around 35 mpg from the 1.4 with a cols start and 10 mins of stop start traffic.

Sent from my HTC One S using Tapatalk

 

[solly84]

Getting great results with my 1.2 TSI DSG, so far 500km done on the car and i am averaging 6.5 L/100km. Which is outstanding compared to my previous 1.6 Hyundai tuscan which was giving me 12 L/100km!!!

 

[Fraczish]

On a bit of a side note, can anyone explain why my screen doesn't have the options that are shown in the later photo here such as tyres, driving, eco extra? Mine has previous and next only as you can see.... Confused....

 

[DeanC]

Click view buddy. Bigger screen is different.