Hi everyone,

 

2017 1.4TSI DSG just had MOT done at local trusted garage. They said there was a misfire on cylinders 1, 2 & 3 and asked what fuel I’d be using. This is usually standard supermarket E10, sometimes a V-Power/Synergy E5 every few tanks to clear out the crap fuel. Garage said avoid using E10 as it’s wrecking the spark plugs on lots of VW 1.2 & 1.4 engines recently. Previous “Bosch” plugs were fitted a couple of years ago and have only done 20,000 miles. I did notice recently it seemed a little sluggish especially from standing start. 
 

Have others had this issue or also using supermarket petrol with a mix of petrol additive (HYDRA PIC-24 etc)?

 

Thanks in advance. 

2015 1.4 tsi which I run exclusively on supermarket fuel (e10 never used any additives). No issues, plugs changed after 40,000 miles and it was still running ok. I do around 20,000 miles a year.

No issues with my previous octavia with same engine. 

Edited 15 August, 20232 yr by classic

@EdHilton Maybe the Bosch Plugs were snide or were they from a trusted supplier? 

 

E5 is lovely,

but Tesco Momentum 99 is a Super market fuel as is Sainsbury 97 (min) super Unleaded.   Good stuff from a supermarket and the E10 95 ron is hardly 'Own Brand' crap it comes in with the base fuel from Royal Dutch Shell that have importation and storage with Greenergy as partners.

 

Then not all E5,s are the dame around the UK, and not all E10,s have up to 10% bio. 

Some ESSO E5 or E10 in the UK is from Greenergy that is part owned by Tesco & supplies others including independents.

?

So where are you in the UK and where were you buying the E10 from?

 

 

Edited 15 August, 20232 yr by toot

@EdHilton 

I just read your previous posts on fuel consumption from 2 years ago and the more recent.

That was the early clue to the plugs or a dirty air filter.   Is the airfilter fresh now?

Edited 15 August, 20232 yr by toot

Thanks for your replies @toot. Those poor consumption figures that I posted about a couple of years ago happened a few months after air filter was replaced. I put that down to an anomaly as since then have been getting 52+ mpg (mainly motorway runs). Usually fill up at Asda in the south London/Surrey area. Since plugs were done a couple of years ago have put in a few tanks of V-power/Tesco Momentum, and also used one of those Hydra Pic treatments so was a bit surprised plugs have gone after only 20k. They were bought

from ECP - like you say maybe down to a snide set perhaps? Coil packs were changed a couple of months after plugs. 

9 hours ago, EdHilton said:

Hi everyone,

 

2017 1.4TSI DSG just had MOT done at local trusted garage. They said there was a misfire on cylinders 1, 2 & 3 and asked what fuel I’d be using. This is usually standard supermarket E10, sometimes a V-Power/Synergy E5 every few tanks to clear out the crap fuel. Garage said avoid using E10 as it’s wrecking the spark plugs on lots of VW 1.2 & 1.4 engines recently. Previous “Bosch” plugs were fitted a couple of years ago and have only done 20,000 miles. I did notice recently it seemed a little sluggish especially from standing start. 
 

Have others had this issue or also using supermarket petrol with a mix of petrol additive (HYDRA PIC-24 etc)?

 

Thanks in advance. 

 

I'm inclined to think you probably trust your trusted garage too much. Usually if you have a ignition misfire the engine check light will come on and possibly the emissions light too. Almost certain to happen if 3 out of 4 cylinders are misfiring. You would cetainly notice misfires when driving, and would noticeably jerking rather than just being "sluggish".

 

The correct OE spark plugs for this engine are double platinum which are very robust and long lived. Platinum alloy tip and ground electrode insert. Platinum is an extremely hard metal only beaten by iridium in the spark plug world.

 

VAG stipulate that fuel additives should not be used, octane boosters often contain metallic compounds such as MMT that reduce the life of spark plugs and poison/clog catalytic converters by coating everything in manganese oxide. (Red in colour)

 

 

Edited 15 August, 20232 yr by xman