Hello,

Car was a former taxi, turned private.

Has Engine code CXXB 1.6TDI, 5 speed manual gearbox.

Engine was replaced after the previous one had knocking all over the place during highway drive. 

Since i got it (and after the engine swap) I treat it with shortened service intervals (i want to keep the car for years)-replacing engine oil each 8000 km (car travels 50K Km a year, not kidding..), also replacing other filters (air, etc) each 10K Km.

DPF is regenerating every 3rd-4th fueling approx. (1500-2000 Km between regenerations). 

 

The main issue is the fuel consumption.

The car does 14km per liter. Maximum. Driving is 70% highway, 30% traffic jam and city. 

When i got it, for the first half year it made 16Km per liter. 

This also happened with the old engine with it's original injectors, and after the new injectors were coded and installed.

(Injectors passed 40K Km until now, bought brand new before the engine swap, then moved to the new engine and recoded to new engine).

 

I have a friend with the 2.0L engine (taxi driver) which according to him "doesn't fall below 25 Km per liter".

 

Is that considered normal consumption in the 1.6L engine?

Edited 8 September, 20223 yr by Matanfr
adding info

20 minutes ago, Matanfr said:

I have a friend with the 2.0L engine (taxi driver) which according to him "doesn't fall below 25 Km per liter".

70mpg for fellow Britons. I think the friend is telling porkies!

The replacing the Long Life oil every 8,000 km / 5,000 miles seems excessive no matter the conditions the car is used in. 

Especially as it does 50,000 km / 31,000 miles a year.

 

The high fuel consumption if there is any is probably due to regens.

 

So much diesel used and also engine oil wasted is a real shame.  Might as well drive a 2 stroke. 

The octavia is quite heavy, so i think the 1.6L is a little weak. But still, 14km per liter?

 

The regens drop the fuel consumption to this amount? it's like petrol consumption..

 

Is there anything that can be checked? EGR? 

Is there any others with a car like yours or exactly the same as yours to say what they get?

 

14 km per litre, so 39 mpg seems pretty good for a taxi IMO for any city work, but as for where you are i have no idea.

 

If you were getting 16 km per litre that was when your DPF was less full. 

 

Maybe get rid of your car and get a 2.0TDI,  or ask your friend to swap for a day and see if you can get his fuel consumption and him the same as you. 

 

His never getting below 70 mpg is an amazing efficiency.    

Edited 13 September, 20223 yr by roottoot

3 hours ago, roottoot said:

Is there any others with a car like yours or exactly the same as yours to say what they get?  Not that i know about. The 2.0 is much more common here.

14 km per litre, so 39 mpg seems pretty good for a taxi IMO for any city work, but as for where you are i have no idea.  I'm doing  70% highway, 30% city driving. This mpg is good for city work but not for 70% highway..

If you were getting 16 km per litre that was when your DPF was less full. DPF was not less full, because after 3 times fueling the DPF regenerated. Per VCDS, the DPF is not full to the max (highest value i had was 15gr). 

Maybe get rid of your car and get a 2.0TDI,  or ask your friend to swap for a day and see if you can get his fuel consumption and him the same as you. Not in my budget, for the moment.

His never getting below 70 mpg is an amazing efficiency. He's a taxi driver who's working night shifts only, doing 80% highway (20% city driving at most). 

 

Answers in red.

@Matanfri know nothing about your highway speeds or stop / start in the city and if you use stop start.

The difference of a couple of km per litre can be a weather thing, but i know nothing about the ambient temps with you.

or a tyre / tyre pressure or even a clogging up air filter thing. 

 

You are spend plenty on consumables so that should not be an issue. 

 Just not a very good engine to have in a taxi if wanting to make good money might be the issue and why others have a 2.0 TDI. 

Edited 13 September, 20223 yr by roottoot