Hello fellow Fitsters!

Last night while checking the oil on my Fit, I noticed it smelled STRONGLY of unburnt fuel.
I know this is an issue with these engines, but the oil was changed about 700 miles ago.
I admit, I probably shift gears far too early with this car (my old car was a Lexus IS350 and I became accustomed to quieter cars), but that's just a habit I'd grown used to.

Should I do another oil change to get the fuel out?
Or should I simply take it on a long, high-speed drive to get rid of the fuel in the oil?

Moving forward, should I keep the rpm's high (not shift to the higher gears) to prevent this issue?

thanks in advance!

 

Check for a loose spark plug. Any smell of gas at startup or in the oil makes me suspect a loose plug. Did you have the plugs serviced during the oil change?

 

I just bought this car from a local Toyota dealer a month ago.
They do not mention anything on the inspection report about doing the spark plugs.

Also, the car does not run rough or miss or have any check engine lights,
Fuel economy seems fine as well.

 

I typically run the revs up on our ‘15 as to avoid the 2200 rpm stumble, seemingly mostly in 2nd and sometimes 3rd... a minor annoyance, but keeping above 2200 rpm after you’re into the next gear ( shifting so the following gear choice starts at a higher rpm) works for me, no stumble, and is more fun... dunno if that would work with the CVT or even how. I enjoy revving it, perfect reliability so far at, I dunno, 66,000+ miles. Guess that slight stumble is considered normal by Honda, from what I’ve read... it’s annoying, and the manual IS fun to rev and row

 

Oh, it IS fun to row thru the gears, which is why I find myself in 4th or 5th probably earlier than I should be

 

You fail to mention, when you checked the oil, was the oil level above where it was supposed to be. If there's any notable amount of gas in the oil then it should raise the oil level. Of course you could have a small amount in the oil, but not enough to raise the oil noticeably.

 

You are right. After checking the oil last weekend, the level seems to have increased from where it was before.

Last night, I took the car on a longer run, making sure to keep the RPM's up (once the engine was warm).
As a result, when I checked the oil this morning, the level seems to have decreased from where it was before and the fuel smell isn't as strong/noticeable as before.

So i guess that proves it...flog it hard once the engine is warm to keep the fuel burning efficiently and engine operating properly.

 

What are you talking about? I am not aware of any issue with unburnt fuel in the oil of the current GK engine. It is not normal and there should not be any reason to rev the engine high to solve this. There is a serious problem with turbo Civics and CRVs but that's their unique problem.

 

Seems like I'm not the only one noticing the issue
https://www.fitfreak.net/forums/3rd-...-dilution.html

 

there was a previous thread on this a while back , i noticed the same thing on my '19 fit . think it was around 5000 miles or so ,
a few days before this i had the car idling a good hour while programing the radio and phone book .this could contribute to this . had the oil analyzed
by blackstone , everything was good for a new motor , had it checked one more time one or two oil changes later , still good . for piece of mind
i'd have them or some other similar outfit do an analysis

 

Just an FYI, you can't trust Blackstone's fuel dilution numbers. They only guess at the number based on the flashpoint, but don't actually perform a spectral analysis or gas chromotography to get a real number.

Most that have had their oil tested at Blackstone and a lab that performs a real test find that Blackstone underestimates fuel dilution by 3-4%.

I didn't know any of that for years and kept wondering why the tests on my Direct Injected vehicle was coming back with very poor viscosity readings, but no fuel dilution issues. The low viscosity was telling the real story....that the oil had broken down due to fuel dilution. In short, take a look at your viscosity number and see if it's lower than it should be for the oil tested. If you have a DI vehicle and it's low, you probably have a fuel dilution issue.

This is all coming back up for me because our brand new 2020 Accord is gaining "oil" due to fuel dilution. That is despite the fact that it is 90% highway driven and always gets to complete full engine temp.

To the OP, I didn't see mention of what year Fit. If it's a 2015 or early 2016, those are very prone to injector issues and that may be the problem. Those injectors have been replaced with a new part number.

 

Yeah, I'm not sure if the injectors were replaced on this car, as it's a 2016. I suppose I can call the Honda service dept. as they have records of everything on that car.
Is there a recall on the injector replacement? How will I know if I qualify?

This fuel dilution stuff is pretty annoying. My previous car (IS350) had port and direct injection and it didn't have these issues during my ownership. Then again, it also had a sump capacity of 6.5 liters, so the remaining viscosity at at the end of an OCI would probably be much higher (more useful life remaining in the oil).

 

There wasn't a recall. Only TSB A18-027 that directed dealers to replace the faulty injectors if there were issues.

Yes, Toyota and Ford have correctly addressed the DI issue while Honda has decided to stick their head in the sand and pretend it doesn't exist.

 

thanks for the prompt reply.
I'll contact Honda to see if it was ever done in it's service history. If it hasn't been done, I'm not sure how I'll be able to convince them that it should be done....

 

Just called the dealership, guess they replaced the injector(s) last Oct 30th.
Guess I'll just have to keep up to date on my OCI's and hope for the best.

 

That's pretty good news. I think you'll be fine with a quality synthetic oil and 5k changes. That's been keeping my DI vehicles happy enough.

 

hey man, it sounds like fuel dilution. it's common with the earth dreams iVTec motors but moreso common with turbo models (ie the CRV).
l