2018 Honda Civic Ex-T Oil Fuel Dilutions - 10th Gen Civic Forum
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post #1 of 4 (permalink) Old 06-04-2018, 12:51 AM Thread Starter
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Angry 2018 Honda Civic Ex-T Oil Fuel Dilutions

Honda Canada is selling serval vehicle models with an undiagnosed engine problem of fuel getting into the oil. I mean excessive fuel causing the oil level to be extremely high, strong gas smell when checking the dipstick, hesitation and a flashing check engine light as well as many other issues. I first noticed the problem in April when my car threw a flashing check engine light and went into limp mode refusing to go above 7kmph. I took it in to Go Honda to be looked at and was told that it has 3 pending codes P0300, P0303, P0304 which are all misfiring codes. Although they told me that there wasnít anything they could do because they were all pending codes and to monitor it. There was no way I was monitoring a brand new car so I had it towed to Sherwood Honda the place I bought it from. They told me that the oil level was high and that was causing my issues. This surprised me as it hadnít even had its first oil change yet as well as was checked by Go Honda and it wasnít high. So I pushed more and found out that it was fuel in the oil causing it to be Ďhighí. They explained to me that Honda Tech told them to check the spark plugs and do an oil change then I was told my car was good to go. Of course Iím not an idiot and am fully aware of what excessive fuel in your oil can do so I refused the car. I contacted Honda Canada thinking maybe the car I received was a lemon and requesting a replacement. It was only after pushing and repeatedly saying an oil change will not solve the problem of fuel getting into the oil that I was told that it has been a reported problem by other owners and it was being investigated. I gave serval suggestions of what causes fuel in oil and requested what diagnostic tests would help locate the issue. Although I was told by Honda Canada that if I wanted these tests I was going to have to pay for them myself. Sherwood Honda agreed to do the tests I requested for free but came out with nothing. Now I wasnít happy with this response from Honda Canada or the results of the tests but after serval arguments I agreed to take the car back assuming an investigation would happen and my car would be recalled and repaired. Now less than 6 weeks later my car is back at Sherwood Honda with high oil level, strong gas smell on dipstick, hesitation and black residue found in exhaust pipe. Sherwood Honda was once again told by Honda Tech to change the oil and check the spark plugs as well as get me to sign an oil dilution form. I questioned what was happening with my blackening exhaust pipe and was told I would be called back. I have also attempted to contact a higher up in Honda Canada but have been given the run around and havenít received a respond since my phone call Tuesday and on Friday they refused to put me through to someone. After hearing that I would need to sign this oil dilution form I googled oil dilution form and found numerous reports of this same problem happening with serval other Honda vehicles all over the world. As well as a supposed email that had been sent out to all Honda Canada dealerships about the issue. Honda Canada is still selling this defective vehicle and has basically told me that if I want an exchange to a vehicle that doesnít have this issue it will cost me because I drove it off the lot. So I am basically being told if I want to exchange the car with a defect I will lose money even though it is a manufacturer defect that they have known about yet failed to tell people so they donít get trapped into a car loan on a defective car.
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post #2 of 4 (permalink) Old 06-05-2018, 11:24 AM
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direct injection engines have this issue...more so with turbo direct injection versions.

most people install a catch can to help alleviate this issue. but, it requires maintenance. it has to be drained every so often.

there are many write-ups, explanations, videos if this all over the interwebz.

as to what is an acceptable ratio of oil & water....i do not have that answer. all i know is that my 2011 sonata (purchased in 2010) had GDI...and i didn't have an issue, however, the turbo models did. also, the harder you drive your car will accelerate the amount of oil and fuel mixture as well.

hiding from those who might be looking for me
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post #3 of 4 (permalink) Old 04-24-2019, 06:26 PM
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While researching the 2018 CRV Touring, discovered the oil dilution issue with the turbo engine. Unfortunately, it was after purchasing my 2018 Civic EX-T in April 2018. At 7,500 miles, maintenance minder came on and I checked oil. Yep, oil dilution (3/4" above the full mark). Called dealership for oil change and they said my VIN# needed the software update. This was done March 2019, now have 10,500 miles and dip stick level is 1/2" above the full mark. Will not purchase the CRV turbo and seriously thinking about getting rid of the Civic which I absolutely love . . . except for the oil dilution. Rav4 Hybrid is now on my list. This is so disappointing as my previous vehicles have all been Hondas (99 Civic Coupe, 99 Accord, 2012 Civic EX). Any comments on how long this engine might last?
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post #4 of 4 (permalink) Old Today, 10:15 AM
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This is concerning. I don't live in a cold climate but I have smelled fuel odor in the cabin on several occasions, I haven't experienced any stalls or other operational glitches.
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