[CU2] Excessive oil consumption

[gambate]

maybe try a thicker oil. do they use like a 5W30... maybe try 10W40.

that is a no no, it is harder for the piston ring to scrap thicker engine oil from the cylinder wall = more oil burn with thicker oil
same with engine that uses hydraulic lifter, thicker oil = louder cylinder head/valvetrain tick.

however, thicker oil might temporarily "fix" leaky valve stem seals.

[dougie_504]

^
I disagree. I've moved from 10W-40 semi to 10W-50 full-synth and I'm retaining about 1L extra oil every 5,000KMs.

[curtis265]

that is a no no, it is harder for the piston ring to scrap thicker engine oil from the cylinder wall = more oil burn with thicker oil
same with engine that uses hydraulic lifter, thicker oil = louder cylinder head/valvetrain tick.

however, thicker oil might temporarily "fix" leaky valve stem seals.

I disagree

it's not about scraping oil off the cylinder wall, it's about having a different flash point

[bugeater]

So a quick question - I was just in the garage and checked inside one of the exhausts. It is certainly sooty (my finger was black from running my finger along the inside). Is this normal? Should it be essentially clean?

Most cars I've cared to inspect this way over the years have been dirty, but they were also old - not a modern car with all the emission restrictions they now have.

[Fredoops]

So a quick question - I was just in the garage and checked inside one of the exhausts. It is certainly sooty (my finger was black from running my finger along the inside). Is this normal? Should it be essentially clean?

Most cars I've cared to inspect this way over the years have been dirty, but they were also old - not a modern car with all the emission restrictions they now have.

Running rich perhaps?

^
I disagree. I've moved from 10W-40 semi to 10W-50 full-synth and I'm retaining about 1L extra oil every 5,000KMs.

Might that have something to do with the fact you switched from semi to full synth?

[dougie_504]

Running rich perhaps?


Might that have something to do with the fact you switched from semi to full synth?

Should burn more then I'd think mate.

[bugeater]

Running rich perhaps?

I was more wondering if this is a symptom of the oil consumption.

[stndrd]

Best way to tell is to get a leak down test and do a dry/wet compression test

[curtis265]

running rich causes soot, not burning oil - sometimes this mixes with condensation and then people also seem to think this is oil... Touch it and see if it's oily

fuel mixture is also controlled by the enigne's computer and won't be affected by the compression

[pesad42]

My 2009 cu2 is burning 4l of oil don't know what to do
Honda should have a oil reservoir as they have one for the radiator

[curtis265]

My 2009 cu2 is burning 4l of oil don't know what to do
Honda should have a oil reservoir as they have one for the radiator

4L?

that's like me saying my car uses 50L of fuel.

Either way, if you lost 4L then your engine would have fried itself.

DId you go back to the dealer?

[pesad42]

4L?

that's like me saying my car uses 50L of fuel.

Either way, if you lost 4L then your engine would have fried itself.

DId you go back to the dealer?

4L every 10k