Chronic
Go Kart Champion
- Location
- Vancouver BC Canada
Yes if your tune requires 93 don't put 87 in
The sticker on the fuel door is recommended octane for the stock tune. Your tuners recommendation supersedes this.
Yes if your tune requires 93 don't put 87 in
But we're not longer using VW's programming. APR is the only party that can answer this question.I was under the impression that in modern cars with ECU's controlling everything, that if the knock sensor detects pre-ignition (knocking) it just retards the timing to compensate. This of course degrades the performance somewhat but protects the engine.
I'd be really surprised if running lower octane fuels does anything other than temporarily "de-tuning" the engine while using it. VW really couldn't sell a car that would hurt itself with the use of lower octane fuels.
For the people who say it "turns down" there isn't an octane sensor or something of the sort.
The car has to knock before it knows to turn ignition timing down.