The 2018 Honda Accord launched the 10th generation with new 1.5T and 2.0T turbo engines, Honda Sensing standard, and a fresh design. The 1.5T turbo has a well-documented oil dilution problem - gasoline mixing into the oil during cold-weather short trips. Honda extended powertrain warranty in cold-climate states and issued multiple software updates. The 2.0T with 10AT is a different story and is generally reliable.
The 2018 Accord 1.5T has a known oil dilution issue covered by an extended warranty in colder states (powertrain coverage extended to 8yr/unlimited miles for affected VINs). Honda issued software updates that improved but did not fully eliminate the issue. The 2.0T 10AT models are largely fine.
Gasoline mixes into engine oil during cold-weather short trips, raising oil level and degrading lubrication. Honda issued multiple software updates and extended powertrain warranty in cold states (warranty extension on affected VINs). Watch for gasoline smell in oil and rising oil level on the dipstick.
Run free diagnosis →The new 8-inch head unit had multiple software issues at launch - freezing, Apple CarPlay drops, audio cutting out. Most addressed via dealer software updates.
Run free diagnosis →New CVT for the 1.5T showed judder at low speeds in some cars. Honda issued TSBs covering software flashes and fluid replacement.
View P0700 Diagnosis →Forward-collision and lane-keep systems can throw false alerts in rain or with bug splatter on the camera/radar. Cleaning resolves most cases.
Run free diagnosis →Some owners report battery dying after 1-2 weeks of sitting. Check for parasitic drain from accessory ports and update software.
View P0562 Diagnosis →The new 10-speed in 2.0T trims occasionally shifts harshly when cold. Honda software updates smooth this out.
View P0700 Diagnosis →Run a free AI diagnosis tailored to your exact vehicle. Get the most likely cause and repair estimate in under 30 seconds.
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With caution. If you can get the 2.0T with 10AT, the 2018 is a solid buy. If buying a 1.5T, verify the latest oil-dilution software updates have been applied and check whether the VIN is covered by Honda's warranty extension. Avoid the 1.5T if you live in a cold climate and do mostly short trips.
Mixed. The 2018 is the launch year of the 10th gen, which means style and tech upgrades but also early-production issues. The 2.0T is generally reliable; the 1.5T has the famous oil dilution issue. If reliability matters most, consider the 2017 (last of 9th gen) or 2020+ (after 1.5T fixes).
Expect $500-750/year in routine maintenance. Plan for software updates, possible 1.5T extended warranty work, and CVT fluid service. Lifetime non-routine cost: $3,000-5,500 to 200K miles, higher for 1.5T owners in cold climates.
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If your 2018 Accord is throwing a check engine light, these are the codes most often associated with the problems above. Click any code for full diagnosis steps and typical repair costs.
Yes. Gasoline mixes into the oil during cold-weather short trips. Honda issued software updates and extended powertrain warranty in cold-climate states. Buyers should verify all Honda updates have been applied.
Generally yes. The 2.0T paired with the 10-speed automatic is a different drivetrain than the 1.5T CVT and does not have the oil dilution issue.
The 2019 has more of the oil-dilution software updates baked in from the factory. If you must have a 1.5T, lean 2019 or later.
Pull the dipstick and check for a gasoline smell. The oil level may also be higher than the full mark. Have a Honda dealer pull the VIN to confirm all software updates and any warranty extensions.
It can be, with the right trim. The 2.0T 10AT is a good choice. Be cautious of 1.5T cars in cold climates, especially without complete service records.