So į thought id start a new thread since į found out what really happend to my Wrx when į crossed the nullaboor. Į finally got my ej207 open... It wasnt a head gasket; būt rather a dodgy petrol station, somewhere in woop woop, substituting their 98 octane fuel with regular/dirty unleaded. This caused non simultaneous ignition within the cylinders => two separate flame fronts => shockwaves = fcuked piston rings. In fact one of the pistons has actually had a large chunk of it burnt away. I'll upload some pics when į get home.

Tl;dr byo fuel when crossing the nullaboor

i'm currently fitting some wiseco forged pistons (.5mm oversize) and some cosworth main + big end bearings. Should be finished soon!

I'll attach a pic of the car just incase ppl have forgotten the previous thread

Also known as PING.

i bet the hot air didnt help with the poor fuel quality too!

shame to see a 207 hammered to death like that.

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Long live the WRC

Question - A few people would be rather interested in the brand and exact location of this woop woop petrol station.
Hint - on long trips when you need to use remote fuel stops carry a bottle of octane boost
Fact - octane rating deteriorates over time, I have been told petrol is ok for at least 6 months.

The 98 may sit in the tanks for a long time due to the lower turnover. You may be better off with the 95 and adding a booster if needed.

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MY00 WRX. 89 Prelude. 99 CRV

would the lower ron fuel still damage the engine if it was running off boost most the time of these big trips??

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Quickest Pig in Perth

haha į thought į would explain the science behind it

hmm this is interesting about octane count decreasing over time... Perhaps this could be put down to evaporation/poor storage. In a completely closed system, the chemical composition/RON should technically stay the same... Haha į guess this is the dodgy fuel storage on the nullaboor though - there's probably n-heptene somehow seeping into the tanks.

Think i'll bring some booster NeXT time

It seems so... Although į cant honestly say that į wasnt under boost At every opportunity to accelerate...

Oh and į forgot to mention... Į don't really know where the culprit petrol station was. Somewhere west of wagga wagga and į imagine. Įf į knew į would be commisioning a fuel test AND invoicing them for the consequent damages.

http://www.facebook.com/photo.php?pi...&id=1016337289

damaged piston...

WTF is up with your "I"'s??

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Signarape!