The 2.0L EcoBoost can make use of the extra octane, it can even run on 91, but the gearbox is programmed to change up to the highest gear in the shortest time.Yes, haven't read anything about that on here. My bad.
So you are saying Kugas suffer from this on longer journeys, but are fine on shorter ones. 🤔 Weird.
Obviously the talk about LSPI missed you.
Didn't see much pertaining to ford on LPSi when I was researching what had happened on my daughter's Astra SRi. A few other manufacturers came up and I can't recall one case on here reference the Kuga petrol.LSPI only affects petrol engines.
LSPI occurs when fuel injected into the combustion chamber may create a liquified solution with a thin residual layer of oil that sits on the cylinder wall. This fuel-oil solution is then forced upwards by the piston during the compression stroke and pressure may cause it to ignite, resulting in an unplanned combustion pressure wave. This is the LSPI event.
Afterwards, the spark plug ignites the remaining fuel-air mixture above the piston that results in a second combustion shockwave. The combined force of the shockwaves is enough, in the long run, to create cracks in the piston and eventually to cause sections of the piston to break away completely.
As far as I’m aware supermarket or top grade petrol has no influence on LSPI.
You got rid at the right time. Eventually it will crack a piston which is what I suspect happened to my daughter's. It's gone now and now we just need to concentrate on getting rid of the wife's Mokka which has a similar engine but I don't think hers is direct injection and puts out 10bhp less.My K series Astra was a dealer pre-registered vehicle that was put into storage. I bought it when it was 9 months old with only 9 miles on the clock. the first time I heard the LSPI was when it was about 12 months old, 3500 miles and due a service.
Spoke with a Vauxhall dealer who played dumb about the problem, looked on a few owner forums and read several posts about the problem and dealer denial. Fortunately I have a mate who works at Vauxhall Ellesmere Port Plant, (home of the Astra). He confirmed rumours that Astra turbo engines had a pre-ignition issue.
A few weeks later he told me Vauxhall had put out a service bulletin to dealers to change the oil from Dexos 2 generation 1 to Dexos 1 generation 2, but this should only be done when the vehicle reached a service interval and an oil change was due.
I phoned a local Vauxhall dealer who wasn’t aware of the bulletin or aware of the updated Dexos oil, so I sourced the updated oil and had my local garage do the service.
Not convinced that the upgraded oil was the answer because it still suffered from LSPI when under moderate load.
My Astra was the SRi model with a sport button. Use of the sport button often caused the LSPI to appear.
About 13 months later I part exchanged it for a 68 plate Focus.