Honda CR-V Oil & Fuel Mix Issue

It appears that a concerning trend has emerged among owners of the popular Honda CR-V, with a significant number reporting a peculiar and potentially problematic mixture of oil and fuel within their engines. This issue, first brought to light by Consumer Reports, has garnered attention from numerous CR-V owners, leading to widespread complaints and investigations into the root cause.

The Widespread Problem: Fuel in the Oil

The core of the problem lies in the presence of unburnt fuel contaminating the engine oil. This phenomenon, often referred to as "fuel dilution," can have detrimental effects on the lubrication system and overall engine health. Owners have voiced their frustrations and concerns, with many first discovering the issue during routine oil checks or when experiencing unusual engine behaviour. The sheer volume of similar complaints reported to the National Highway Traffic Safety Administration (NHTSA) and aired on online forums dedicated to Honda owners underscores the widespread nature of this defect.

Honda's Response and Recall History

The situation escalated when it was revealed that Honda had initiated a recall of 380,000 CR-Vs and Civics in China back in February due to similar reported troubles. This move, while addressing the issue in one market, left many American consumers questioning why a similar proactive step wasn't being taken domestically. The delay in acknowledging and rectifying the problem for U.S. consumers has led to considerable frustration and a feeling of being overlooked.

After persistent owner complaints dating back to early 2017 and repeated inquiries from Consumer Reports, Honda eventually issued a statement indicating that they were actively working on a solution. A company spokesman confirmed that a fix was being developed and was intended to be available through authorized Honda dealers by mid-November 2018. Crucially, this repair was slated to be covered under warranty and would also be applied to 2019 model-year CR-Vs before their official release. However, the automaker remained tight-lipped about the specifics of the repair, the number of affected vehicles in the U.S., and the precise reasons for the delayed response.

Safety Concerns and Expert Opinions

A significant point of contention is Honda's assertion that the problem does not pose a safety threat. This conclusion has been met with skepticism from automotive safety experts, including those at Consumer Reports. As David Friedman, vice president for advocacy at Consumer Reports and a former acting director of NHTSA, pointed out, "There are many ways stalling can be a safety issue, so if these cars are stalling, they need to be recalled." He further emphasised that even if no specific safety defect is identified, Honda has a responsibility to its customers to notify them and provide a free repair at a dealership.

The potential for engine stalling, even if intermittent, can undoubtedly create hazardous situations on the road, particularly in traffic or at higher speeds. The lack of transparency regarding the exact nature of the fix and the number of affected vehicles only adds to the unease among owners.

The Frustration of Continued Sales

Adding to the anger and frustration is the fact that Honda continued to sell vehicles equipped with the engine suspected of having this defect. Owners, like the individual mentioned earlier, expressed dismay at the ongoing sale of the 2017 engine, knowing that it possessed a known issue. This practice, perceived as a disregard for consumer well-being, has understandably fuelled public outcry.

Understanding Fuel Dilution

Fuel dilution occurs when gasoline fails to combust completely in the engine cylinders and instead seeps past the piston rings into the crankcase, mixing with the engine oil. Several factors can contribute to this phenomenon:

• Short Trips and Cold Starts: Engines that are frequently started and driven for short distances, especially in cold weather, may not reach optimal operating temperatures. This can lead to incomplete combustion and increased fuel washing into the oil.
• Rich Fuel Mixtures: An overly rich fuel-air mixture, often caused by faulty sensors or fuel injectors, can result in excess fuel entering the combustion chamber, some of which can escape into the oil.
• Engine Misfires: When an engine cylinder misfires, unburnt fuel can be expelled into the exhaust or, in some cases, can be pushed past the piston rings into the oil.
• Faulty PCV System: The Positive Crankcase Ventilation (PCV) system is designed to remove blow-by gases from the crankcase. A malfunctioning PCV system can lead to increased crankcase pressure, potentially forcing fuel into the oil.
• Driving Habits: Aggressive driving, frequent hard acceleration, and prolonged idling can also contribute to conditions that favour fuel dilution.

Consequences of Fuel Diluted Oil

The presence of gasoline in engine oil significantly compromises its lubricating properties. This can lead to:

• Reduced Viscosity: Gasoline thins the oil, reducing its ability to form a protective film between moving engine parts.
• Increased Wear: With diminished lubrication, critical engine components such as bearings, camshafts, and piston rings are subjected to increased friction and wear.
• Degradation of Additives: The detergents and dispersants in engine oil can be depleted by the presence of fuel, further reducing the oil's effectiveness.
• Potential for Bearing Failure: In severe cases, the lack of proper lubrication can lead to catastrophic bearing failure, resulting in extensive and costly engine damage.
• Sludge Formation: While fuel dilution thins the oil, the interaction with other contaminants can sometimes lead to the formation of sludge, which can block oil passages and further impair lubrication.

What Can CR-V Owners Do?

For owners of affected Honda CR-Vs, the primary course of action is to stay informed about Honda's official communications regarding the recall and the repair process. It is advisable to:

• Monitor Oil Levels and Condition: Regularly check your engine oil level and its condition. If you notice an unusual gasoline smell or if the oil appears thinner than usual, it's worth investigating further.
• Consult Your Owner's Manual: Familiarise yourself with the recommended oil change intervals and the type of oil specified for your CR-V.
• Contact Your Honda Dealership: If you have experienced symptoms or are concerned about the fuel dilution issue, contact your local Honda dealership to inquire about any available service bulletins or recall information pertaining to your vehicle.
• Document Everything: Keep records of all oil changes, maintenance, and any communication with the dealership or Honda regarding this issue.
• Report Issues to NHTSA: If you have not already done so, consider reporting your experience to the NHTSA. This helps regulatory bodies track the extent of the problem and encourages manufacturers to act responsibly.

Frequently Asked Questions

Q1: What exactly is happening to the Honda CR-V engines?
Owners are reporting that unburnt fuel is mixing with the engine oil, a phenomenon known as fuel dilution. This can reduce the oil's effectiveness and lead to increased engine wear.

Q2: Is this a safety issue?
While Honda has stated it's not a safety threat, automotive experts and Consumer Reports suggest that engine stalling, which can be a consequence of such issues, is indeed a safety concern.

Q3: Has Honda issued a recall in the U.S.?
As of the information available, Honda stated they were developing a fix and aiming for availability by mid-November 2018. A recall was issued in China previously.

Q4: Will the repair be free?
Honda indicated that the repair would be covered by the warranty.

Q5: What can I do if I own an affected CR-V?
Monitor your oil, contact your Honda dealer for information, and keep records of your vehicle's maintenance and any issues you encounter.

The situation with the Honda CR-V highlights the importance of transparent communication between manufacturers and consumers, especially when it comes to potential mechanical issues that could affect vehicle longevity and safety. Owners affected by this fuel dilution problem are understandably seeking clarity and a swift resolution from Honda.