2015 Leon FR ST 2.0 DSG 184 - MPG

[wr6warren]

Good evening,

I'm just wondering what sort of MPG people are getting from this configuration of car? I know its meant to do 58mpg on paper, Ive never seen numbers like that, even on a good run. This is my first "sensible" engine car and first diesel in 14 years of driving.

Up until last week I had Continental Conti Sport Contact tyres all round, I was seeing in around 49/50mpg at a push if I was trying. Recently got a set of Pilot sport 4 tyres on the front axle, now I'm down 40-42 normal driving and about 45-47 if I'm properly crawling it to work. My last tank worked out by math rather than the read out was 43.5mpg. (Is this normal for pilot sports?)

I could get mid 30s from my old 2.0 TFSI Octavia VRS, the brakes are all free as anything, tyre pressures are good. Im just wondering is this normal for this configuration of car? Cant see it sticking around too long if this is typical mpg!

Thanks!

 

[Big Col]

I'm on my 2nd car with the 184 engine.
I see pretty much 500 miles = 50mpg to every tank. Long term figure on the fuel computer is usually 50/51.

I can see high 50's if I drive with economy in mind, which I rarely do.

These were both manuals, I've heard the DSG robs you of 4-5 mpg.

As with any economy complaints, what sorts of journeys do you do?

 

[wr6warren]

My commute is 25 miles, about 22 of that being fairly calm motorway 60-65mph, then a couple miles in the city.

Im lucky to see about 450 miles to a tank, these Pilot Sport 4's seem to have hindered a lot even though they are only fitted to the front axle

 

[SRGTD]

Factors to consider;

• Fuel retailers will have switched to selling winter diesel now, which gives fewer mpg than the non-winter blend. When I drove diesel Golfs, typically my mpg would worsen by around 10% during the winter months When running on winter diesel.
• Do the PS4’s have a lower fuel efficiency rating than the Conti‘s you previously had fitted? If so, then that would also contribute to a deterioration in fuel consumption. PS4’s are quite a grippy tyre so may have a higher rolling resistance compared to your previous Conti’s; good for grip because of increased grab and friction between the tyre and road surface but not so good for fuel economy.

When I changed from rock hard Bridgestones to PS4’s last year, I also noticed a reduction in mpg with my VW. A few less mpg and superior grip - PS4 v’s Bridgestone - is a sacrifice worth making IMHO.​

 

[Jay5959]

Other factors to consider

Are the tyres at the correct psi? If you got them fitted at somewhere like kwik fit, they probably won’t be. Edit: sorry I didn’t see the bottom of your post .

the weather has been terrible the past week, high winds lots of rain and standing water and cold snaps. These all have a massive impact on mpg.

dpf regen, if you’ve had one this week that would have tanked your fuel economy.

You’ve only had them a week so I wouldn’t be worried yet. Plus I’d take worse fuel economy for a much better tyre, which the PS4 are a lot better especially in the wet compared to contis sport contact.

I have PS4 (not the s) on all corners, I can get 56/57 mpg on long motorway runs if the weather is good and I’m being sensible, manual 184 that is (I’ve also heard dsg is worse for fuel economy) I’ve done 100 mile run today, 40 miles of a roads and the rest motorway. Lots of elevation changes, the weather was horrid and had a pretty full car. Got 48 mpg driving to the speed limits, fairly happy with that. Had much better mpg in better conditions on the same run.

 

[Big Col]

i've ran bridgestones , Michelin PS4's and Goodyear F1A3's and F1A5's, and 17" winter tyres, not noticed any great change in mpg's between them

 

[KXL]

Give it a tankful of Shell or Esso's finest diesel (Vpower / Supreme) and see if your numbers improve?

 

[wr6warren]

@SRGTD had no idea they changed the fuel, would be funny if that happened between me getting the tyres and filling up again.

@Jay5959 ive noticed a good drop in MPG when doing a regen, thankfully doesn’t do it massively often!

@Big Col sadly mine was immediately noticeable drop, but I’ll keep driving for now and hope it improves a bit. As said the grip from them is certainly fantastic, I guess that must come at an efficiency cost. I’ll know to get some sort of more eco tyre next time, this is my “daily beater” as such.

@KXL ive always ran it on fuel from a local station here in NI called “Go”, never had any issues before but I could give BP a try and see if I notice any difference!

 

[Paulo16]

I’ve just swapped to PS4’s from Goodyear assy 3’s and I’m seeing a small change from 54-55 down to 50-51 on the same regular journey. Thought it was me but for the improvement of the tyres I’ll accept it.


Sent from my iPad using Tapatalk

 

[Leon xLux st etsi]

I'm on my 2nd car with the 184 engine.
I see pretty much 500 miles = 50mpg to every tank. Long term figure on the fuel computer is usually 50/51.

I can see high 50's if I drive with economy in mind, which I rarely do.

These were both manuals, I've heard the DSG robs you of 4-5 mpg.

As with any economy complaints, what sorts of journeys do you do?

I have 2018 2.0 TDI 184 DSG, normal driving to work and back on B roads I get 50mpg but long term is about 46-47mpg due to DPF regens. Mine is estate.

 

[Jay5959]

@SRGTD had no idea they changed the fuel, would be funny if that happened between me getting the tyres and filling up again.

@Jay5959 ive noticed a good drop in MPG when doing a regen, thankfully doesn’t do it massively often!

@Big Col sadly mine was immediately noticeable drop, but I’ll keep driving for now and hope it improves a bit. As said the grip from them is certainly fantastic, I guess that must come at an efficiency cost. I’ll know to get some sort of more eco tyre next time, this is my “daily beater” as such.

@KXL ive always ran it on fuel from a local station here in NI called “Go”, never had any issues before but I could give BP a try and see if I notice any difference!

How is the fuel economy now mate? Still the same or has it improved?