Can E10 Cause A Misfire?
by FTE Published on Monday, February 2nd, 2026
Here’s the surprising connection between E10 fuel and engine misfires.
E10 can cause misfires in incompatible vehicles through fuel system contamination and water absorption.
Ethanol’s hygroscopic properties attract moisture causing irregular combustion patterns.
Water contamination reduces octane rating and creates lean fuel mixtures leading to misfires and rough running.
Check vehicle E10 compatibility immediately if experiencing misfires after the fuel switch, and revert to E5 super unleaded if problems persist.
Comment below if your engine ran worse with E10.
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