oil burning

[fatgtr]

hey there
my car is burning oil at the moment. it only does this from cold when u step on the gas.(and when it idles a bit) i have been told its possibly the guides or piston rings. what im wanting to know is that how much oil would it generally be burning? like heaps or piss all.
any help would be appreciated

[fatgtr]

plz need an answer guys

[celica_tommo]

keep an eye on your dipstick

[badidas]

check the pcv valve we had a celeca gtr that was covered in black crap from burning oil
i think the pcv valve on them was just a push in on the breather hose from the tappit cover but i cant remeber

[fatgtr]

yeah but how would the pcv valve contribute to the oil burning?. my cars a 91 so its most likely gana burn some just hoping that it doesnt burn like a liter ever couple of weeks like my friends honda does

[badidas]

BECUSE when the pdv valve doesnt do its job oil contaminates the inlet manifold and gets burned in the combustion chamber smoking like a bastard

[jondee86]

If your engine is in good nick it shouldn't use much more than a litre of oil between services (10,000 km).

Cheers

jondee86

[kingcorolla]

If your engine is in good nick it shouldn't use much more than a litre of oil between services (10,000 km).

Cheers

jondee86

WHAT??

if a cars in GOOD nick, and the lubrication system and the rings are doing there job, it should burn no oil, just get dirty and need replacing. Thats what the "oil control ring" is for. Keep oil out of the combustion chamber

When u work at a dealership and most of ure job is doing services, (on toyotas )
u know that 85% of car owners dont touch there cars and only get them serviced every 6 months/10,000km. I think if every GOOD NICK car burnt a litre of oil every 10,000km, I think there would be A LOT more mechanics around.

can i get a amen??

[GT 20Valve]

Haha let me guess is your car a levin?

I could be wrong but those cars have a real problem with burning oil!

[fatgtr]

na man its a celica

[Tofu]

it really depends on how worn ur piston rings etc are.

if u are really worried why not get urself $10 and head to repco for some of that "no smoke" stuff.....it works wonders

then it shouldnt smoke/burn as much

ps. this will not FIX THE PROBLEM, just temporarily fix it till u replace what is worn.

[jondee86]

Hmmmm....... engines use oil because the valve guides need to be lubricated, the rings need to be lubricated, and some of the oil is vapourised by heat and lost through the crankcase ventilation system. This is normal. Work the engine hard and it uses more oil (ask someone who races). Use a full synthetic and you burn less. Consumption will increase as the engine wears, but a litre per 10,000 km is a useful guide.

Cheers...

jondee86

[kingcorolla]

ahhh correct but not every car is a race car, and are driven conservitavely. and ur rite, oil does heat up and is lost through ventilation system but this does not major oil loss, if it was, then EVERY car would be built with a catch can! Same with the valve guides, not a noticable loss on the dipstick.

when engines wear they do use more oil but have u forgot, we are talking about cars in GOOD NICK, remember?

[jondee86]

OK... let's get to the theory part !!!! Contrary to popular opinion, engines are designed to use oil. This is necessary for proper lubrication of the rings, and the "oil ring" is designed to remove excess oil from the cylinder wall, while leaving a thin film for the compression ring/s to run on. This prevents scuffing of the ring on the cylinder wall, aids ring sealing, and assists in heat transfer from the piston crown to the cylinder wall. The film of oil is evaporated/burned during the combustion process. So far so good

Engine manufacturers typically quote Specific Oil Consumption figures for new engines of between 1.0 g/kWh (heavily loaded) to as little as 0.1 g/kWh for a lightly loaded engine. Here we will take 0.3 g/kWh as a typical figure for a 100 kW family car. Consider this car traveling at a steady 100 k/h. It will probably be making about 25 kW.

This gives an oil consumption of 25*0.3 = 7.5 gms, and the car will have travelled 100 km. Under these conditions, after 10,000 km the engine will have used 10,000/100*7.5 = 750 gms of oil. At a SG of (say) 0.8 this will be 750/0.8 = 0.937 litres for a brand new i.e. "good nick" engine.

Of course, not everyone drives at a steady 100 k/h for 100 hours. So actual consumption will vary +/- according to conditions. Some may appear to use little oil due to lube oil dilution with fuel under cold running/short trips. But this does not mean the engine is not using oil. Lube oil dilution can lead to bearing and corrosion problems.

Now.... back to what you were doing

Cheers.....

jondee86

[jondee86]

OK... let's get to the theory part !!!! Contrary to popular opinion, engines are designed to use oil. This is necessary for proper lubrication of the rings, and the "oil ring" is designed to remove excess oil from the cylinder wall, while leaving a thin film for the compression ring/s to run on. This prevents scuffing of the ring on the cylinder wall, aids ring sealing, and assists in heat transfer from the piston crown to the cylinder wall. The film of oil is evaporated/burned during the combustion process. So far so good

Engine manufacturers typically quote Specific Oil Consumption figures for new engines of between 1.0 g/kWh (heavily loaded) to as little as 0.1 g/kWh for a lightly loaded engine. Here we will take 0.3 g/kWh as a typical figure for a 100 kW family car. Consider this car traveling at a steady 100 k/h. It will probably be making about 25 kW.

This gives an oil consumption of 25*0.3 = 7.5 gms, and the car will have travelled 100 km. Under these conditions, after 10,000 km the engine will have used 10,000/100*7.5 = 750 gms of oil. At a SG of (say) 0.8 this will be 750/0.8 = 0.937 litres for a brand new i.e. "good nick" engine.

Of course, not everyone drives at a steady 100 k/h for 100 hours. So actual consumption will vary +/- according to conditions. Some may appear to use little oil due to lube oil dilution with fuel under cold running/short trips. But this does not mean the engine is not using oil. Lube oil dilution can lead to bearing and corrosion problems.

Now.... back to what you were doing

Cheers.....

jondee86

[pplmvr]

man, this has become a complicated one .. beats me.. get a new egine..

[NZ_AE86]

This Jondee fella is not wrong, some euro cars (I know we are not talking about euro cars) are expected to use 3L of oil per 8K of driving, this is according to the owners manual!! WTF!!

All engines will use oil. Most 4AGE's will use anywhere from 500 - 1000mls between services. Even if you check the dipstick every day and it does not appear to have used any, this is because your dipstick is showing you how full you sump is of oil and whatever else is mixed in. Water or Fuel will always be contaminants in oil but it is hard to tell how much of each is present.

[solberg Fan]

Man, i didnt realy understand that. This is what i saw:

1.0 g/kWh, 0.1 g/kWh, 0.3 g/kWh, 100 kW, 100 k/h. 25 kW.

25*0.3 = 7.5 gms, 100 km, 10,000, 10,000/100*7.5 = 750 gms, 0.8, 750/0.8 = 0.937
100 k/h for 100 hours, +/-,
Cheers.....

jondee86

*just nod ur head and agree*

[kingcorolla]

k dude u win!

how can i compete with that?

i just thougt 1L oil per 100km was a bit drastic u know?

didnt know ul get all scientist on me! lol

[badidas]

said it b4 but ill say it again the pcv valve is most likley the problem
when there ferked it lets oil into the intake manifold and burns it causing smoking ect we had a celeca gtr do it when i was working for petermark automotive and it took a bit of time to sus out what the problem actualy was