i bought a stage 3 2wd saphire cosworth a few months ago, the last few weeks it has started to burn quite a bit of oil
the car has the usual stage 3 goodies with a hybrid turbo, rs500 cooler its still on the 205 block
what are the usual causes? would it be worth my while changing valve stem seals?
or would i be better getting piston rings and turbo redone! but its running fine, no blue smoke when accererating, its spluttters a bit when starting from cold !

 

so what colour is the smoke and when does it smoke?how much oil are u using?

 

i'll get a bid of blue smoke after its been boosting then say pulling up to a junction, not getting it when accelerating hard, i would say black smoke if anything while accelerating! i would say about 1to 2 litres per 2/300 miles varies!!

 

hmm have u got a breather kit fitted

 

i do! but i never fitted it previous owner did! doesn't look right to me, its just been fitted using black rubber hose cut to length! i've had doubts about it!

 

where do they go?does one go to to block under the turbo?what grade oil u using?

 

if i remember correctly one comes from the block under the inlet, one to the rocker cover and the others just to a wee filter to the atmosphere! so should there be one going to the block under the turbo? when i saw that filter i new it never look right!

 

am using mobil 1 15/50, the oils been every 3000 miles since new mobil 1 used everytime!

 

one goes to the oil filter breather under the inlet manifold one to the rocker cover one goes in the block under the turbo other to atmos?

 

The oil is your answer as it is crap.
It does not hold it's viscosity very well at all.
Try changing to a decent oil like SILKOLENE PRO S, your engine will also get a lot quieter in the process.
If it has any amount of miles on it the head will need work such as stem seals as a minimum but any much over 60,000 guides/ex valves are usually shot as well.
Or it could be turbo wear, it does from your desecription sound more likely, look in the inlet pipe between turbo intercooler for oil.
tabetha