I put diesel in a petrol car at 3% mix. What will happen.
I am using the car, it doesn't seem to be making any difference but I can't get any more petrol in to dilute it. Is it frothing up or what?
you might well get away with that especially as the ECU is still working normally. If the lambda gets fouled the ECU will revert to limp mode and the car will drive like a pig, dont do it again!!!