Smoking

Dezzy · #1 26th June 2012, 02:58 PM

I'm lucky enough to have a friend with a long private road and i noticed the other night that at 140+ my 8 smokes, alot. Enough for me to worry! plumes of white blue smoke, she's buring oil. Now it's not something i've noticed when revving hard in other gears but could be that i've not clocked it because it would only be sat at hight revs for not very long before a snatch another gear. But i should be able to replicate this in every gear right? or is it likely that it's only when strained hard i.e. free revving won't cause it when staionary but trying to push the old girl up past 130 does? What's your thoughts?
I've noticed she has smoked before but when i have started it moved it on the drive and then shut off, the next time i fired her up white blue smoke goes past the window. I've never worried about it because it was only very occasional and only when shut off soon after starting.

She does use a bit of oil but it says in the handbook that they can use upto (don't remember) per 1000 km.

Looks like i'm never taking her to the speed limiter in feer of KABOOM

mannyo · #2 26th June 2012, 04:35 PM

1 Litre per 1000km is whats in the manual.

roboblob · #3 26th June 2012, 06:15 PM

you having to top up the radiator too ?

Dezzy · #4 27th June 2012, 08:33 AM

Quote:

Originally Posted by roboblob

you having to top up the radiator too ?

No just top up oil, she uses no water.

SilverS8 · #5 27th June 2012, 09:06 AM

1 litre pr 1000km is as somebody mentioned correct according to the manual. This is clealry just to prevent people from complaining on high usage..
I would say that any Petrol car using that amount of oil has a serious failure. Unless you hit the rev limiter 10 times a day, then it will spit oil up the breather system.

I've driven my S8 for about 20 000km now and have had 2 oil changes. between those i have topped her of with a total of max 1 litre( half a litre pr 10000km)

Over to your problem, If it smokes on WOT i would assume its your piston rings or the dreaded alusil is worn out. It Could also be the valveseals but usually they will give you a puff of smoke when you go back on the throtle after "engine braking" from higher revs on a gear in manual mode.

Dezzy · #6 27th June 2012, 09:35 AM

Ok well i'm using more oil than that, not a litre per 1000km though. Maybe it's her way of saying she's getting to old for being pushed hard.

I'll tickle her along a bit as a friends son wants it as a wedding car as he's been let dow by the Jag

he was going to use. Not sure it'll look all that fantastic in the photo's with plumes of blue smoke bellowing out her bum.

sarg · #7 27th June 2012, 10:54 AM

My 4.2 40V used to give the odd puff of blue smoke, especially on full throttle, but it didn't worsen over 30,000 miles, so ignored it

ainarssems · #8 27th June 2012, 11:39 AM

Blue is unburned petrol, white-oil. 1l of oil to 1000km will not give you oil smoke. Looks like yours is unburned petrol which is down to poor combustion or overfuelling at WOT.

SilverS8 · #9 27th June 2012, 11:53 AM

Quote:

Originally Posted by ainarssems

Blue is unburned petrol, white-oil. 1l of oil to 1000km will not give you oil smoke. Looks like yours is unburned petrol which is down to poor combustion or overfuelling at WOT.

I disagree.

Blue Smoke = Burnt oil
Black Smoke: Unburned fuel
White Smoke: Water

ainarssems · #10 27th June 2012, 01:10 PM

Quote:

Originally Posted by SilverS8

I disagree.

Blue Smoke = Burnt oil
Black Smoke: Unburned fuel
White Smoke: Water

If you have lot of unburned fuel then yes it is black if just some then it's blue.
Water= steam not smoke

Oil = white smoke. Try heating piece of metal until it glows and put it oil bath like when hardening metal in oil: http://www.youtube.com/watch?v=DHMWN-A_6RY you will see what I mean. Also I have seen plenty of 2 stroke air cooled scooters and mopeds with too much oil added to petrol around giving white smoke or chainsaws for that matter.