Quote:
Originally Posted by sierra
Here's the post.
Hey guys so my dad accidentally put 87 instead of the premium 91 he only put 20$ so about 16L but i noticed a pinging noise more then usual and i asked him and he realized he put the wrong gas in the tanks half empty now but WHAT DO I DO!!!! HELPPPPPPPP
The engine was already knocking with the 91 octane because he noticed 'a pinging noise more than usual', so clearly 91 isn't up to the job for this engine. That's why they say to use 93 or higher.
I run mine on 98RON[US93] and have never heard any pinging[knocking].
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He's probably hearing the direct injection knock, it's crazy loud at low RPM under load. I highly doubt the engine can ping itself to the point of damage with the knock sensors, timing adjustment(cam and ignition) and multiple fuel maps.