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NW Iowa | The biggest thing is not slug the engine with one or the other right away.
Blend up and down to whatever you are switching too.
Usually if you have an empty tank and fill it with a complete different blend (E85-E10) it will throw a code.
If that happens, I will reset by taking the ends off battery and touching them together and see if it resets. If it doesn't I'll run the tank down and re blend and try resetting again.
This is because the engine ECU has to trim the fuel/ air mixture to get it to proper specs. Sometimes it get thrown off.
Since we don't know the real gas you were getting its hard to judge. Very easy to fill up on crappy gas these days. Some places just get a bad load in.
Also sometimes plugs wear out at different rates.
Those plugs ran all kinds of fuel mixes for 91000 miles. Anything could have happened in that time.
I would like to see what they looked like when pulled out.
Is this a flex fuel vehicle? | |
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I love Ethanol BUT explain this
