Castrol Euro 5W40 | 1672 mi | 2018 CRV 1.5 - High Fuel

[fantastic]

I'm reusing the Fram Endurance that was on there. It only has 1672 miles on it. I've been going every other oil change on the filter for a couple of years now. On my Civic as well.

Shall I say that is very "Efficient" of you. I know, cheesy right.

Yeah, I wouldn't be coming up with these weird, elaborate OCIs if I didn't think it might improve things. LOL

Understood, just know that different mileage samples that are doubled will skew the results some. If you get tired of looking at your high fuel dilution on this CRV just go put some miles on that luxurious S80 of yours.

 

[himemsys]

This is the easiest/fastest way I've discovered to do a check.

on a cold engine, start and run for a minute, then shut down and monitor fuel pressure with a diagnostic tool. so shut down and turn on power without starting.

the purpose of running a short while on a cold engine is that there's some heat in the block, that will then spread to the injectors and heat up the fuel in them after shut down. If there's no leaks, you will see the pressure steadily rise, if the pressure stays the same or drops you have a small or bigger leak.

Okay, I'm assuming FRP psi is the right number to watch. Fuel Rail Pressure. I followed your instructions and the number climbed steadily. From about 700 to 900 when I stopped watching and shut it down.

 

[himemsys]

The silicon seems a little high on this report. Compared to sample #2, which had about the same amount of miles in the same driving conditions, silicon is up from 7ppm to 16ppm. So I took a look at the filter:

Doesn't seem too bad for 7900 miles. I decided to leave it in until the next oil change in October.

 

[Jetronic]

Okay, I'm assuming FRP psi is the right number to watch. Fuel Rail Pressure. I followed your instructions and the number climbed steadily. From about 700 to 900 when I stopped watching and shut it down.

then you got no leaks.

 

[himemsys]

then you got no leaks.

Wow. I get legit 5+% fuel dilution with no help! LOL

 

[Jetronic]

Wow. I get legit 5+% fuel dilution with no help! LOL

the spray pattern might not be good, but that's not an easy check.

how are the injectors mounted, on the side of the head or in between the cams? the first location is more prone to fuel dilution, the latter heats the injectors more.

 

[himemsys]

the spray pattern might not be good, but that's not an easy check.

how are the injectors mounted, on the side of the head or in between the cams? the first location is more prone to fuel dilution, the latter heats the injectors more.

Honestly, I don't know.

 

[OneLonelyBurrito]

the spray pattern might not be good, but that's not an easy check.

how are the injectors mounted, on the side of the head or in between the cams? the first location is more prone to fuel dilution, the latter heats the injectors more.

The 1.5T is side mounted injectors

 

[Jetronic]

The 1.5T is side mounted injectors

that's what I expected with that amount of dilution, thanks.

 

[OneLonelyBurrito]

that's what I expected with that amount of dilution, thanks.

While I agree the wall-guided (side injected) DI is more prone to fuel dilution than spray-guided (center mounted injection). Not all engines with wall-guided DI are as prone to fuel dilution as the Honda's are. I have a feeling Honda didn't select the right fuel injector spray pattern for the engine.