[CU2] Excessive oil consumption

[Jasemas]

Not as much side effects
but the condition of your engine and its health
You also need to confirm whether or not your engine is leaking oil or consuming it
Consuming is okay (in terms of oil loss)
But leaking oil is a whole other problem

[tw586]

Merc trucks actualy have a oil injector into the intake system to burn off engine oil on purpose, they have a self top up system to keep the oil level at the full mark in the sump and a 80L reserve tank to supply oil to the engine, when the tank is empty time to change the oil service interval is @80k so topping up the oil is good for the engine as you are introducing fresh oil to maintain good lube properties

[curtis265]

I dunno how true this is, but i read somewhere that oil in the intake stream reduces the effective RON of the petrol, so there's a risk of predetonation.

[tw586]

not with diesel and diesel is rated in cetain which is a slower burn scale compaired to RON, diesel will burn at about half petrol speed. oil in a petrol intake wont actualy effect the speed at which the fuel will burn however it will have a effect on the combustion process, and on lpg fuel systems they add oil into the air stream for upper cylinder lube, I think the brand name was Valve Saver, some old fart like me even used it when we couldnt by super for our old iron head V8's in the early 80s

[bugeater]

My worry is we don't really know what is causing the loss, plus it is clearly different than the majority of other Euros out there. If they all did it, then the situation would be different. I also don't mind a small amount of loss, but having to top up between services with a new car seems pretty crap.

Plus, once the thing gets older and starts consuming oil naturally, this will just add to the current loss.

[tw586]

I have a small but simple test to determine where oil is being used
drive the car untill it is at operating temp, allow to idle for 5 to 10 min
attach a 4 gas exhaust gas analizer to the exhauxt and monitor HC in ppm
blip the throttle quickly and only go to 2500rpm, then monitor HC if it rises sharply about 10 to 20 sec after you have bliped
the throttle is lead me to think it is a valve guide seal issue.
next hold the rpm at a steady 3000 to 3500 and watch the HC, if it rises slowly and continues to rise above 800 ppm then rings are the issue
Note when connecting the 4 gas it must be done before the Cat Converter so it may have to go to a work shop to do this test

[Luppifs]

Folks, was wondering what the outcome was for those undergoing the "oil consumption watch" exercise ?

Sorry to revive an oil thread, but I've recently discovered my 2012 CU2 is consuming oil, to the point where i've already had the oil pressure warning light come up before the car even hit the 5,000km mark. When i measured it, there was barely enough oil to touch the end of the dipstick.

I owned a 2007 CL9 Euro for 5 years (drove it for 78,000km), and it didn't lose a drop of oil whilst i had it.

[Fredoops]

Some recent cu2 are a bit lemon-y......

[bugeater]

My CU2 is the one with the issues. I'm still taking it back every 1000 km and usually it is stable around 0.3l per 1000 km, which is below where Honda Australia claim they will do anything. However, on one check it was slightly below 0.5l per 1000 km which is where their cutoff is. At the next service I'll be asking what is to be done. Should nothing be done I'll be considering legal options. I don't think 0.3l per 1000 km to be acceptable. With a brand new car you should not have to top up between services, which means it should consume less than 0.1l per 1000 km as far as I am concerned.

I would like to know what "normal" is though. So I might put a poll up if I can.

[bugeater]

Update: last oil check is at 1l/1000 km. They'll have to do something now. I'm a bit worried about the sudden increase in consumption though.

[curtis265]

Update: last oil check is at 1l/1000 km. They'll have to do something now. I'm a bit worried about the sudden increase in consumption though.

that's alright, you'll just get a new engine. no worries!

Are you comparing cold to cold readings?

[bugeater]

I'm not taking the reading, Honda are. They basically top it up and measure how much goes in as far as I can tell. So the car is warm when they do it.