https://carfundi.com/2022/02/28/honda-earth-dreams-engine-engine-oil-dilution-concerns/

You may have an engine oil dilution problem if you own a Honda CRV or Civic with the 1.5-liter turbocharged engine. Over a million Honda CRVs and Civics from 2016 are affected by the engine oil dilution issue.

Fuel seeps into the engine crankcase during cold temperatures. It combines with the oil, causing the oil level to rise to abnormal levels. The mixing also reduces the viscosity of the engine oil to dangerously low levels, putting the engine at risk of catastrophic damage.This issue has prompted service campaigns and class action lawsuits in nations where Hondas equipped with this engine are sold, including the United States.

The Problem

The engine in question uses Honda’s “Earth Dreams” technology, which is a direct-injection engine that injects high-pressure gasoline into the combustion chamber. This engine is recognized for its performance and fuel efficiency, although it has issues with engine oil dilution. Because the sprayed fuel does not entirely burn off in some circumstances and under certain operating conditions, it trickles down to the crankcase and mixes with the engine oil. The constant dilution raises the oil level in the crankcase and lowers the viscosity of the oil. Engine damage is more likely as a result of this reality.


Check engine lights were illuminated, there was a stench of gasoline fumes in the cabin, and the engine misfired, according to owners of such vehicles. When driving, the fumes could make owners dizzy.

What you can do to help

To address this issue, Honda in 2019 extended the powertrain warranty of all vehicles equipped with the 1.5-liter turbocharged engine in all 50 states of the United States to six years and unlimited mileage, regardless of the weather. Whether you own one of these vehicles, make sure to check with your local dealership to see if you’re eligible.

These cars’ engines rely on heat from the engine to burn off the gasoline vapors. Avoid frequent starts and stops as much as possible, and make sure your vehicle is close to operating temperature before driving. This method may be useful in resolving the issue.