2018 Honda Accord: Gasoline in oil
Common wear/failure (not a recall)
Symptoms
Owners of the 2018 Accord report: gasoline in oil. CarComplaints.com lists 11 owner complaints, average mileage 12,050 miles.
NHTSA has 608 owner complaints for the 2018 Accord in this area. Examples:
- NHTSA complaint ODI #11769767 (filed 10/07/2026): “The car hesitates upon acceleration and when it “misses” enough it will flash the engine on the dashboard, and not allow any further acceleration, going into “limp mode”. all the safety controls error on the message center and dashboard warnings all come on,…”
- NHTSA complaint ODI #11769208 (filed 10/06/2026): “The car was rough upon idle one day and all the lights came on and systems went down i was bout to drive to a place where the code was read that’s when i first discovered this was a known issue which this model. head gaket…”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: fuel in oil over 5% oil analysis done (1 reports). Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $3,700 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
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