[Redman]

No problem, hope your engine is ok.
I wonder if they are using cooler running spark plugs now ? I would ask the question if you get them done. Cooler running plugs may reduce possible lspi.

 

[23768094]

Indeed.

I only use 95RON BP as the car feels sluggish on 97RON BP Ultimate. Shell & Tesco are miles away or I'd try their higher octane fuels.

That's interesting. I used Tesco Momentum 98 (99?) for the first time the last tankful and the car felt sluggish and slow to react to the throttle. Every other fill in my 4k miles of ownership has being standard 95 (various brands) and had no issues. I'll stick to 95 from now on.

 

[Scotty_b]

I put it down to BP fuel. I'll try a tank of Esso Synery+ this weekend and see how it feels.

 

[Redman]

Your engine ecu learns what type octane fuel you have put in and it takes a while for it to do it I think. It is continually altering the ignition timing and learns it can advance it more if no knock is detected. Your first tank of higher octane fuel will be slightly diluted with lower octane fuel. So It is your 2nd consecutive fill which is probably more realistic to judge it by. My car runs great on higher octane fuel.

 

[Boroboy]

Your engine ecu learns what type octane fuel you have put in and it takes a while for it to do it I think. It is continually altering the ignition timing and learns it can advance it more. Your first tank of higher octane fuel will be slightly diluted with lower octane fuel. So It is your 2nd consecutive fill which is probably more realistic to judge it by. My car runs great on high octane fuel.

I'd just run the engine on regular fuel, the fuel it was designed to run on. I see no point of wasting money on higher octane fuel, there will always be the potential of lspi issues on this engine, down to design.
With vaux changing their oil within the production run, points to engine design. These engines should have need tested to destruction, prior to production.
I've never had any petrol related engine running issues with petrol engines I've owned in over 30 years of driving. I've always used regular fuel.

Hi Boroboy
The ecu update recommended the use of higher additive fuels irrespective of what it was designed for(tsb 3319) presumably because it reduces the chances of superknock.
The research which still is not solved into lspi was done by all the car companies together. The oil wasn't developed for these gdi turbo engines until 2015,and took along time to manufacture and distribute. All car manufacturer's who make these engines have had problems and use the appropriate oil to reduce lspi.

This is higher fuel additives, not higher octane within fuel? Is it not. To help with the lspi. Presumably branded fuels, against supermarket types.

 

[Redman]

Hi Boroboy
Your guess is as good as mine with regards to additves they put in. Have all these cleansing additives in lets say shell v power been tested for lspi incidents. It was an additive they removed and replaced in the oil to reduce lspi, but there are more oils out there with this old additive in than without it and branded oils at that. As said earlier I can only go off the octane value myself . Each to their own on what they think and experience with their car.
The artical did not mention fuel cleaning additives or brands just Ron value. I think my car runs slightly better on Tesco momentum but it might just be placebo effect.

 

[AK16]

New informative video about LSPI.