Have the tyres been changed?

Have the tyres pressures been checked?

Has the alignment been checked?

 

Thanks AG Falco

@Flymo61

We do know here that @the very least Taxi drivers should know what fuel they put in and what miles they get per litre.

They do the books after all and should know the cost of overheads. Pay taxes etc.

 

Amazingly over the years Taxi Drivers come to the forum asking exactly the same thing as you have.

The answers anyone can give or their thoughts are almost the same as there is no others that can be given.

 

There are plenty here buy their own fuel, drive for the reasons they drive and do it through more than one year with the same vehicles and understand what does affect their fuel consumption.

 

Personally i make sure i know exactly what the fuel consumption is of every vehicle i drive, 

empty with me or loaded, and just driving or hypermileing, 

and with DSG's / SCR what difference Coasting makes when available or suitable, 

also the affect of driving useage on the AdBlue use.

 

 

Edited 24 November, 20196 yr by Roottootemoot

Miles per tank is notoriously inaccurate. Calculated mpg based on litres filled and miles travelled would give a better idea of how much exactly the mileage changed. 

 

Funny story, I use to get people who gauge fuel consumption by number of miles travelled by cost of filling up Now imagine that lol. 

Might sound silly... what is your instant fuel consumption at idle should be in the region of 0.4-0.6 liters per hour depending if ac is on or not. Assuming you know very well your car try to think what changed except fuel consumption lately more detail you notice and you are able to report to skoda might pin point to the actual problem...as indeed you mpg is very steep..

 

As an example...

 

My 150 manual has a long term average of 37 mpg( uk) and 45mpg achieved almost on every trip i do(computer reading and matches every fill up according to liters in over distance covered error in my case  not exceeds 3 mpg, computer seems to be optimistic most of times), most of them are over 15miles for the last 2500 miles...

I run a 1.6 dsg as a taxi. Today, my trip said 40mpg buzzing around Coventry centre all day for 11 hours.

 

Ive just returned a courtesy car Hyundai Ionic, which never done less than 60mpg, and averaged 63 over my 2 month in it. Approx £30 per tank difference 

Factors I find that affect fuel consumption are, in no particular order:

- Load in the car.

- Wet weather (the tyre is now acting as a water pump which it doesn't have to do in the dry - more water = bigger effect)

- Cold weather as the heated seats and heated screen are on more  . . . . .   Nothing to do with the engine efficiency at all.

- more/less local trips (My commute is 30 miles and to me that is a short run, a decent run in is to head office (150 miles) or my son's place (100 miles) or parents (90 miles) a local trip is a mile or two to the shops or my daughter's place - worst case is when a tank lasts 650 miles instead of 800 and then you notice.)

- My mood i.e.  how fast do I go! (but it needs to be consistent over a week to have an effect)

- Tyre pressures (i.e. has it just been in for service and did they change the tyre pressures)

- Hot weather (i.e. Is the air con on - nothing to do with engine efficiency at all)

- Heavy traffic although with stop-start it has less effect than it used to (i.e. does my commute take me 50 minutes or 90 minutes or 2 1/2 hours).

- If it has been in for service and they have had it idling in the workshop for a period.

 

To the poster who talks about low air temperature being good for consumption is wrong - it increases power by getting more air mass into the cylinder for the same volume (why we have charge coolers) and not fuel efficiency which is managed by the ECU which measures air mass and adds the appropriate amount of fuel based on throttle opening.  More power output means you are generally using more fuel . . . for fuel efficiency you want the smallest throttle opening for the desired effect so the effect of air temperature will be insignificant in an intercooled turbo diesel.  

 

Any power output measure based on the first run when everything is cold is not accurate as it is not representative, OK for bragging rights at the pub (or when meeting the mates at McDonalds ;-)) but when the car doesn't deliver that when you need it just because it is warm . . . . . . 

 

Reckon I’m on for 550-580 miles on this tank as a taxi 

12 minutes ago, sapf0 said:

Reckon I’m on for 550-580 miles on this tank as a taxi 

That is pretty much what i am getting out of a tank in London doing 300-350 miles per week.

Don't think the OP wants to talk any more?

 

Only trying to help. 😕

 

Thanks AG Falco