I feel awful for starting another oil thread but I couldn't really find the answers I was looking for and there's so many threads to look at! So my 2 questions are;

1) where does the oil go/where is it used exactly? I know the purpose of the oil and the job it does, but I don't quite know where it disappears to?

2) can the twinchargers take any other oils other than 5w-30? Are there any other oils which may slow down the oil usage?

My car has recently been using more and more oil it seems, it's always used a fair anount but even though it's done 42500miles or so, the last 2.5k miles seem to have been particularly thirsty.

Thanks very much for sharing your knowledge

Just when you need George :(

Hopefully someone who is in contact with him by other means will pass this on - if anyone knows the answer he will.

High oil consumption is usually due to an oil leak or being burnt in combustion. Oil used to lubricate the cylinders and valve stems can find it's way into the combustion chamber. Skoda reckon that a litre of oil per 1000 miles is within acceptable limits.  

High oil consumption is usually due to an oil leak or being burnt in combustion. Oil used to lubricate the cylinders and valve stems can find it's way into the combustion chamber. Skoda reckon that a litre of oil per 1000 miles is within acceptable limits.

So effectively lots of these engines have oil leaks? Do many other modern cars use it? My friend has a 2007 3 series BMW and I'm sure he's said his drinks it too.

I don't want this thread to go off on a huge oil discussion because we've plenty of those, I'd just been pondering those questions recently and knew I could rely on the good members of briskoda to enlighten me!

So effectively lots of these engines have oil leaks? Do many other modern cars use it? My friend has a 2007 3 series BMW and I'm sure he's said his drinks it too

.

I doubt if the high consumption is due to oil leaks.

i personally dont think its in the combustion phase, i think its to do with how the engine lubricates the parts , because when mine was using oil it was all over the back of the car not burnt still as oil should be , and they changed oil squirter jets that fire oil onto the piston's, didn't seem to work for mine 

i personally dont think its in the combustion phase, i think its to do with how the engine lubricates the parts , because when mine was using oil it was all over the back of the car not burnt still as oil should be , and they changed oil squirter jets that fire oil onto the piston's, didn't seem to work for mine 

That will be because one of your pistons will have been damaged. If there was no compression then the oil could pass though unburnt

 

The vRS oil usage is down to it being used in the combustion process and this is a symptom of failure or severe wear of one or more of the piston rings or failure of the piston itself

 

There are many other ways for an engine to lose oil though - leak, valve wear/failure, high crankcase pressure (many reasons for this) HGF etc

My understanding is that the oil is squirted onto the underneath of the pistons on the upward stroke of the combustion cycle. It does this to lubricate and as a cooling aid.

 

I believe that this is where the oil is lost, hence why the oil isn't burnt, but finds its way out of the car through the exhaust system.

My understanding is that the oil is squirted onto the underneath of the pistons on the upward stroke of the combustion cycle. It does this to lubricate and as a cooling aid.

 

I believe that this is where the oil is lost, hence why the oil isn't burnt, but finds its way out of the car through the exhaust system.

It would still need to get past the piston and up to the head and exhaust valves though. The underside of the piston there is the connecting rod and the crank and sump. No way out unless past a seal or pressure valve

My understanding is that the oil is squirted onto the underneath of the pistons on the upward stroke of the combustion cycle. It does this to lubricate and as a cooling aid.

 

I believe that this is where the oil is lost, hence why the oil isn't burnt, but finds its way out of the car through the exhaust system.

and I also believe this is WHY it burns more when driven gently and less (none in my case) when driven hard...... more seal.... If mine is just doing driving lessons, it can use a litre in 1,000 miles, and I often see a puff of smoke on gentle throuttle from say a 30mhp to 40 mph zone...

 

when driven hard my car uses nothing at all, for example 3,000 miles to and from the ring 100mhp+ on autobahns, very high speed track, lots of full throttle high revs, over TWO days....

 

got back, checked oil, still at max.....

 

full track days ect , at max....

 

I believe its just lets a bit of oil in on the pistons under light load..... load dependant on ring seal ect ....

 

(hypothysis!)

 

edit for wakey: I thought it was sprayed along the side of the piston too....

and remember guys, some engines are DESIGNED to use oil.... honda have never had a v-tec "failure" but have had countess engines destroyed by owners not checking oil and topping up!

 

our merc deisel ambo's use about a litre every 3k (which is about what my car is averaging!)

Well that's why engine's (blocks) are being changed,

 

VAG's manufacturing tolerance's were something to be desired when it came to the 1.4TSI block.

 

Were not talking massive defects, otherwise the engine wouldn't run correctly. Were just talking enough for vaporised oil to squeeze past.

 

Some cars have it better than others, that is highlighted on here with everyone having different consumption figures.

indeed, I think this engine design is awesome, I believe all their problems have been quality control. My CAVE used less oil than my "fix" CTHE for example!

oh, and different weights OP? I top up with 5W40 , the 40 means its thicker at higher temps, seems to work better on my car , hot engine, track days ect .

The twin-charger engine is known to run rich so the oil can become a little diluted with petrol and therefore can, but not always, get past the piston rings a little more easily.

indeed, I think this engine design is awesome, I believe all their problems have been quality control. My CAVE used less oil than my "fix" CTHE for example!

 

What year is your cthe sharkrider?

oh, and different weights OP? I top up with 5W40 , the 40 means its thicker at higher temps, seems to work better on my car , hot engine, track days ect .

I'll give that a go then, cheers!

Also, anyone favour any particular brand of oil? I normally use Castrol Edge or Mobil 1, but there's loads of others out there - Fuchs Titan, Motul Sport, Shell to name a few?

And thanks everyone for the interesting replies!

I'll give that a go then, cheers!

Also, anyone favour any particular brand of oil? I normally use Castrol Edge or Mobil 1, but there's loads of others out there - Fuchs Titan, Motul Sport, Shell to name a few?

And thanks everyone for the interesting replies!

 

Was regular user of Castrol Edge when I first bought the car. Then moved to VW Quantum and Mobil ESP but all have shown regular use/consumption over time. Recently put in a fresh sump of Shell ECT and, so far, usage has been much less.

 

You pays your money and all that!

Edited 6 March, 201511 yr by Lee

What year is your cthe sharkrider?

April 2013. my CAVE was one of the first 2010.

 

I'll give that a go then, cheers!

Also, anyone favour any particular brand of oil? I normally use Castrol Edge or Mobil 1, but there's loads of others out there - Fuchs Titan, Motul Sport, Shell to name a few?

And thanks everyone for the interesting replies!

I use this good value and meets higher than ness VAG spec. VW 502, 505 http://www.ebay.co.uk/itm/Triple-QX-5w40-Fully-Synthetic-Car-Engine-Oil-1L-ACEA-A3-B3-Spec-1-Litre-/291380992275?pt=LH_DefaultDomain_3&hash=item43d7a91913

Wheres George gone?

April 2013. my CAVE was one of the first 2010.

 

I use this good value and meets higher than ness VAG spec. VW 502, 505 http://www.ebay.co.uk/itm/Triple-QX-5w40-Fully-Synthetic-Car-Engine-Oil-1L-ACEA-A3-B3-Spec-1-Litre-/291380992275?pt=LH_DefaultDomain_3&hash=item43d7a91913

So your cthe will be an early one yeah? 

Wheres George gone?

temp ban

 

So your cthe will be an early one yeah? 

not that early, late 2012 they were introduced, but I think changes have been made since my engine!

That will be because one of your pistons will have been damaged. If there was no compression then the oil could pass though unburnt

 

The vRS oil usage is down to it being used in the combustion process and this is a symptom of failure or severe wear of one or more of the piston rings or failure of the piston itself

 

There are many other ways for an engine to lose oil though - leak, valve wear/failure, high crankcase pressure (many reasons for this) HGF etc

it's 100 percent not the combustion phase of these engines or it would be masses of black soot like tuned up diesels cough out i think the oil squirter jets is a viable fix , i was speaking to the master tech at RRG and its light driving which F*cks these engines up big time , not enough pressure to seal the rings causing oil to pass INTO the combustion chamber but under heavy load which these cars love they dont use a drop, only problem with mine was the dodgy idling before the oil squirter jets and after i have no idea if mine is still using oil at an alarming rate as i haven't checked but mine is a poorly vr's its used about 10-20 litres now since birth in 2012  and i can only describe its idle as someone with parkinson's the pedal's shake aggressively constantly and revs fluctuate 

It has to be being used in the combustion primarily - its getting burned as part of it. How it's getting in there is the real issue. Not to dis your mate but I'm a chartered mech eng. and have looked at the problem a lot recently. Obviously the reasons why are only speculation on my part as Ive not seen the problem or had the chance to tear down an engine but there are reports of sooty tail pipes. As the engine has evolved and various fixes implemented there are many engines in differing states with multiple failure modes. This makes it difficult to standardise the reasons of failure.

 

I also dispute that light driving causes damage - it's more that hard driving hides symptoms due to the extra heat and therefore expansion and better seal in the bore. This will only apply to certain cars in a certain state. Some cars suffer total piston failure and no amount of thrashing will mask this.

 

Have a read of this thread - A lot of what the chap says makes a lot of sense  :coffee: