As I am getting extremely low MPG from my OCTAVIA I have been suggested to use fuel additive to clean the  fuel injector. But wondering how people do it with this new lock system fuel tank. see the attached photo.

Make sure the additive is dpf safe. Skoda don't recommend additives.

Maybe just try a few tanks of shell V power diesel or similar, with additives that are safe included.

You would need a funnel or nozzle for that opening, similar to ones used when. You use a small fuel can/tank.

If you really want to put additives in your fuel you can get a plastic funnel from VW or Ford or eBay for a couple of quid which is the correct size for a diesel filler and will open the lock.

 

Who suggested adding the additive?

I am assuming your fuel economy was good before & is now lower? By how much?

What kind of driving profile do you have?

 

Is your car a Mk3 or the Mk2 ?

 

Hi Gabbo, Thanks for the advice. This is my first SKODA. I have been driving it since few days but this is not a brand new car..it has run around 63k..

 

it is i believe MK3 car, zero road tax, 74.3mpg fuel consumption.

The second hand car shop where i bought this car from has given me advice to use fuel additive for injector cleaning, he also advised me to take the car to the motrway and drive 70mph in 4th gear to keep the dpf clean and then watch the mpg

I have been driving in Eco Mode

 

 

Automass, you won't get 74.3mpg and you certainly won't get anywhere near that driving in London where your profile says you live.

 

Around London town be happy if you're in the mid 40's

Thank you themanwithnoaim..i am not even expecting that..but if i get mid 40's i'll be damn happy. at the moment what i m getting is in the city is mid 30's.

 

I would do as glosrich says.

Stick in some decent fuel, take it for a decent drive somewhere on the weekend & wait for a couple of weeks or 2 tanks of fuel.

You cannot look at fuel economy over a couple of days when you dont know the history of the car.

 

Pay attension to how you are using the Accelerator pedal.

The octavia has a fairly agressive pedal calibration so even with small changes in position you can have quite hard acceleration.

"ECO Mode" doesn't really change anything except meaning you have to push the Accelerator pedal further for the same torque output.

If you still accelerate the same as you would in "normal" mode you wont see any fuel saving benefit at all.

Its just an aid to help you drive more conservatively but you have to change the way you press the pedal otherwise you wont gain anything.

 

I had a hirecar 1.6 Octavia and a 200 mile round trip (mainly on the empty motorway at night) gave me easily in the 60s from the trip computer.

 

****! I made a mistake. i have tried to see if lucas injector cleaner (very thin long neck compare to redex) can open up the locks because everyone was saying if you push then the lock will open up..and normally that's how every car operates. So just to see i tried with lucas and it opens up, bottle went inside and it stuck because cap was there i guess. I tried to take it out carefully but couldn't. it moved around, just wasn't coming back out..i popped in to a garage..the guy took it out by force..i thought he might have damaged the lock...went to the pump and tried to load fuel.luckily it works..went to another pump to double check...it works..but lucas can not open it any more. So wondering if i have damaged anything.

ans how other people add the additive...for diesel car we need to use dpf additive sometime.

I don't know what the dpf additive is that you are talking about. The dpf is a self regulating system that shouldn't need any intervention from the driver. The only thing I can think of which you may be referring to is AdBlue which is only used in the latest cars running an SCR system. You will know as the car will have a blue filler cap near to the fuel cap. I don't believe any Octavias at the moment run an SCR.

Ian

but the guy from cargiant advised me to put some fuel injector additive to get the injector clean..how we meant to add them in this car? does anyone use this?

 

There is access to the fuel tank under the rear seats, you just need to take them out and remove the in-tank pump, then pour the additive in there. You may need a good penknife.

 

Easy 

3 minutes ago, pist0nbr0ke said:

There is access to the fuel tank under the rear seats, you just need to take them out and remove the in-tank pump, then pour the additive in there. You may need a good penknife.

 

Easy 

 

wow..really! i need to dig it someday. thanks for letting me know the easy way of doing it.

20 minutes ago, automass said:

but the guy from cargiant advised me to put some fuel injector additive to get the injector clean..how we meant to add them in this car? does anyone use this?

 

...is an idiot. He's just talking *******s to get you out of his hair so he can sell more cars to other people without you pestering him.

4 minutes ago, automass said:

 

wow..really! i need to dig it someday. thanks for letting me know the easy way of doing it.

 

Please don't. I was taking the p. Sorry.

I also thought so..hahaha.

 

So I assumed that we don't need to add any foreign object in the fuel tank and no one in this forum does it.

Edited 27 February, 20179 yr by automass

I would not use an additive its mostly paraffin, the reason is this, if the dpf or the cat are damaged its easy for a garage to pin this on you,  as there not recomended. Use a decent fuel and screw it when the engine is up to temp, this is how to clean it. 

 

If you bought it from cargiant its probably been a hire car and doesn't need screwing, no car goes like a hire car.

I agree with the others that there is no normal reason to add an additive to the fuel to a modern diesel.

The DPF & injectors require no normal intervention outside the regular service intervals.

 

As suggested, give it 1 or 2 tanks of good quality diesel & see how the economy goes.

I'm sure it will improve once you take it for a long run outside of London or on the motorway at steady speed.

 

If you really insist on adding something to the tank, go to a VW/Skoda or Ford garage or look on eBay.

For a couple of pounds you can buy a filler funnel designed to open the filler protection lock on diesel cars.

These are made so that you can add fuel from a can if you run out & cant make it to a petrol station.

I would have thought 30 mpg will be normal if all your doing is city driving in london,from your posts you do seem hung up on mpg why not fill the tank & just drive the car for a while & work out the correct mpg figures from each tank of fuel used & the sort of driving you are covering town use etc or motorway use,maybe a diesel car isnt for you,petrol or electric or a hybrid may be a better option for you. 

Thanks once again Gabbo. I'll try to buy them on line if i can find one.

17 minutes ago, mikey vrs said:

I would have thought 30 mpg will be normal if all your doing is city driving in london,from your posts you do seem hung up on mpg why not fill the tank & just drive the car for a while & work out the correct mpg figures from each tank of fuel used & the sort of driving you are covering town use etc or motorway use,maybe a diesel car isnt for you,petrol or electric or a hybrid may be a better option for you. 

 

I dont just drive in the city. Dual carriageway is just 200meters away from the place where i live. on my last calculation I got 79miles (70miles motorway drive in 70mph) and when i filled up the tank it was 8.25liters. so if you calculate, its around 40mpg i got from the motorway which is totally unacceptable..anyway, I don't need any advice in regards of the MPG at the moment. I was trying to see how many MPG i can get from a full tank, but because of the yesterday's situation i had to refill the whole tank..now i will carry on driving until tank is emptied.

 

 

Edited 28 February, 20179 yr by automass

A 1.6 tdi in a heavy ish car like the octavia will always have to work harder,my volvo has a 1.6 D engine & volvo quote 62 mpg however the best ive ever had is 57 mpg,i average around 46 mpg per tank of varied driving so your not so far off,on a run out at 70 mph on the motorway i will get around 48/49 mpg,have you checked the basics like the condition of the air filter & when was the fuel filter last replaced? these can have a big effect on fuel economy & overall running of the engine,a additive is a waste of time on a modern engine.

13 minutes ago, mikey vrs said:

A 1.6 tdi in a heavy ish car like the octavia will always have to work harder,my volvo has a 1.6 D engine & volvo quote 62 mpg however the best ive ever had is 57 mpg,i average around 46 mpg per tank of varied driving so your not so far off,on a run out at 70 mph on the motorway i will get around 48/49 mpg,have you checked the basics like the condition of the air filter & when was the fuel filter last replaced? these can have a big effect on fuel economy & overall running of the engine,a additive is a waste of time on a modern engine.

 

My car quoted 85.6mpg on extra urban and 62.1mpg on urban, average 74.3mpg. So what i got on motorway was not even half of the MPG that they recommended, moreover i was driving in ECO MODE.

i checked air filter and it appeared to me all right. last servicing was done 2/3months ago. it was always been serviced from SKODA apart from last one i believe.

As stated before, ECO mode has no direct effect on fuel economy.

The difference between ECO, Normal & Sport is just the pedal linearisation to encourage you to drive differently.

However, in all modes you have the same available torque & power so if you press 100% the pedal, the performance & fuel economy will be the same.