So I've scoured the forums a bit and haven't come across a lot of info on anything like this (apologies if I've missed it - please redirect me!).

 

My Octy (2007, 1.9 diesel automatic) seems to be drinking oil like there's no tomorrow. It's averaging about 1ltr per 1000 miles, consistently - much higher than any car I've driven so far. I've taken it back to the garage and they've (repeatedly) told me they can't find anything wrong with it, and even suggested that if if I didn't like that level of oil consumption that I should just buy a new car (!). Needless to say I'm not too happy with that answer.

 

I'm aware some Audis and Volkswagens of a similar age also drank a lot of oil, something regarding the piston rings wearing out quicker than intended. I've not come across anything suggesting Skodas were also affected by this.

 

Anyone else had this problem, and had it properly diagnosed (and fixed?!)?

 

Cheers,

Tom

Skoda's with the same engines & components can be exactly the same as the Audi's and VW's.

High Oil consumption.

 

What were the technicians expecting to find unless they dismantled the engine, 

but if you had no warranty and unless you were going to do a proper oil consumption test with 

measured and weighed oil, you are just going on your own measuring and gauging by how much oil you top up with.

What about changing oil to more viscous one? For example, 5w-40 instead of 5w-30 or so. A friend of mine just said that it's usually done for older engines that have been used for some while.

Actually you can't do much harm to the engine but maybe it helps.

I don't know the mileage of your 1.9 but your oil consumption does not sound right. My 1.9 pd has done 89,000miles, most of its mileage is on the motorway at the legal speeds every day, I change the oil and filter every 6,000 miles, and it uses no oil between changes.

I don't know the mileage of your 1.9 but your oil consumption does not sound right. My 1.9 pd has done 89,000miles, most of its mileage is on the motorway at the legal speeds every day, I change the oil and filter every 6,000 miles, and it uses no oil between changes.

 

The oil consumption sounds really high. 

 

My old Superb I 1.9pd (owned by me 23k-165k miles) always burnt oil fairly quickly if at the top of the dipstick range, but once halfway through this it leveled out - usually not then requiring topping up between oil changes. After a while when going for oil changes I asked for it to be filled to this mark. 

 

Double check crankcase ventilation - if engine pressurised this can blow oil past the valve seals

Edited 24 October, 201510 yr by bigjohn

I'd say that's not a normal rate of consumption for a 1.9. My 05 with 168K has burnt about half to 3/4 of a litre in 7500 miles. 

 

Check for blue smoke on startup, blue smoke when on boost ( get someone to follow you when doing so ) If there is any I'd check the boost pipes then to see if they're wet/full of oil. Anymore than a light misting of oil in the pipes or a couple of table spoons worth of oil at the lowest point of your pipework will give an indication of turbo seal failure. 

 

If you aren't competent at it, Take it to another garage that can do a full leakdown test which will pin point where the failure is. 

The oil consumption sounds really high. 

 

My old Superb I 1.9pd (owned by me 23k-165k miles) always burnt oil fairly quickly if at the top of the dipstick range, but once halfway through this it leveled out - usually not then requiring topping up between oil changes. After a while when going for oil changes I asked for it to be filled to this mark. 

 

Double check crankcase ventilation - if engine pressurised this can blow oil past the valve seals

 

 

 

I have had exactly the same experience as bigjohn with my 2009 1.9 Octavia (55k miles).  After a service and an oil fill to the top of the mark, it will quickly use oil down to the middle of the hatched bit on the dipstick, and then use none at all after that. 

That's really high usage!

 

I sometimes get through half a litre or a litre between 10k mile services but depends on the types of journeys etc.

 

Normal driving it doesn't use any at all really but if it's pushed hard it can tend to use some. For instance a trip to Germany a couple of years ago. 30c+ temps, fully loaded car, top speed on the Autobahn and some steep mountain roads meant it needed a top-up but according to the manual that's normal.

 

Does it smoke much?

I had the same problem with my 1.9 superb, 59 plate, it turned out the bores where scored, forcing the oil under pressure out the head gasket, had to get a replacement engine

Edited 25 October, 201510 yr by skippy41

Get 5W-40 oil. My ex-Fabia has got 300k km on ODO and don't consume any oil. I've always used 5W-40 on cars over 100k km on ODO.

I had similar consumption after my last 2 services, thought the engine was on its way out. Serviced it myself this time and noticed the sump bolt had been leaking, so replaced with a new one and job done! Could be your garage reused the sump bolt, but it has a one use only washer fitted.

Thanks for that everyone!

I've been using 5W-30 and may well switch to -40 to see if that makes any difference. I've noticed some smoke on sharp accelleration, but no patches on the driveway so I figure it must be burning off somewhere. I think I'll be taking to a garage to ask if they can run a full test to see where it's going.

Thanks for that everyone!

I've been using 5W-30 and may well switch to -40 to see if that makes any difference. I've noticed some smoke on sharp accelleration, but no patches on the driveway so I figure it must be burning off somewhere. I think I'll be taking to a garage to ask if they can run a full test to see where it's going.

I would look for some mechanical failure first - I've never seen a car drinking 1l per 1000miles...except russian KAMAZ ;-) 1l per 10,000miles sounds more usual and it is cured by thicker oil (5W-40).

 

WARNING!!! Based on result from lab - even premium oils are rarely viscous as they claim !!! For example Liqui Moly Diesel High Tech is something like 5W-35 when new and becomes 5W-30 after about 5000km; so 5W-30 is around 5W-25 and it was a cause number one in first few years of new 2.0l TDi engines.

 

When to replace oil.

 

Every car smokes on hard acceleration ;-)

 

No smoke = no fuel = no power; It is economy/emission/power syndrome all over again ;-)

Please stop posting this sniper -- the PD is very fickle on its oil and must be as specified. Don't use thicker oil -- your engine will not thank you for it.

 

and what's the problem? do you think there is just one oil on market, which fits VW505 or 505.01 ??? VW 505 can be 5W-30 or 5W-40. even 10W-40.

 

If I take my old VW manual, there is RECOMMENDED VW 502, 505, 507 oil spec.

 

 

If you have no idea what are you talking about sir, don't talk at all.

yep, RECOMMENDATION ;-) Which means you can use whatever you want because it is your car.

 

How manufacturer knows what are you planning to do with your car? What is your driving style? What is condition of your engine?

 

Recommended 15k or even 30k interval for short trips is sure way to destroy your engine but keep up with your recommendation :-P

 

It is up to you what do you use in your car. They recommend because they create bull**** back-up. They are aware of fact that most people don't know what they do and western culture of law suits is result of this RECOMMENDATION. 

 

If someone recommends to jump from the window - are you going to do it?

 

It is common sense. Your engine is old and drinks oil - thicker oil. Your engine is wearing excessively - you reduce oil change intervals. It is very simple.

 

And your argument about PD engines is also myth ;-) Base of most oils are same, some have extra additives, some not. As long as you don't use cooking oil, it really doesn't matter. But don't tell anyone because you'll wreck car makers marketing ROFL

From mechanical point of view. Oil pressure is created by tight tolerances among parts (not by oil pump as eExperts love to tell).

 

Worn engine has got wider tolerances and loosing oil pressure. Keep using 5W-30 and you're on sure way to destroy your engine.

 

It is up to you. Keep with recommendation and scrap your car in 200k km or use common sense and drive 1mil km with very same engine you have now. It's your choice.

As on other threads, you know better than anyone else, don't you?.

Thats your popular argument if someone challenges your "truth" based on old wives stories. You love polemics about nothing on this forum but God bless if someone actually knows something.

 

I never claimed I know more - I just spread facts based on my years of mechanical engineering and experiments with my cars.

 

It is up to you if you like to listen eExperts, so called experts in authorised services or someone who actually has done it and shares his wisdom. I don't know how about you but I never listen to those people, that's why I achieved mastery in my field and advanced knowledge based on 20 years of experiments.

 

If you talk, you can't hear. If you can't hear, you can't learn.

But VW don't recommend oil, they stipulate the minimum specification it must meet. Therefore if there is a 10W40 oil that meets the appropriate VW spec then your fine.

Got a link to such an oil which meets either 505.01 or 507.00?

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If you talk, you can't hear. If you can't hear, you can't learn.

Says the man who just posted 3 times in a row :D

Says the man who just posted 3 times in a row :D

and point is? I didn't ask question ;-)

But VW don't recommend oil, they stipulate the minimum specification it must meet. Therefore if there is a 10W40 oil that meets the appropriate VW spec then your fine.

Got a link to such an oil which meets either 505.01 or 507.00?

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10W-40

5W-40 this one I use now. I paid 25.74€, that is 20£ or so?

 

As I said, pick the cheapest and change it every 8000 and you will be ok - there is tons of oils. I always find wholesaler who has got barrels and sells it per liter. If you drive 30k km per year as I do, you can buy 20l barrel for even less per litre.

Edited 31 October, 201510 yr by sniper29a

I'm on Sniper's side.

Collected some information on Latvian forums. Many, many users use 5W-40 instead of 5W-30 (some of them even don't know why do they do that way but their neighbour does it and they do the same) - they all are fine. I've heard a numerous statements that dealer also uses 5W-40. It depends on your driving style. 5W-30 is for easy driving and it's and economical one. 5W-40 is for ones who want to drive in harder way (fuel consumption rises) etc.

 

So, I think that recommended one is to be used when you have no idea about possibilities. If you got some knowledge then you can adjust your car buy using a different flywheel (if possible), different oil, injectors or whatever else. If you choose right thing then you won't do any harm.

Edited 31 October, 201510 yr by Jevpls

I wouldn't say 5W-30 is economical. They are same for cold starts but 40 can take some more heat.

 

5W-40 becomes 5W-30 after about 8000km because dirt reduces thermal capacity and viscosity. But max service interval is 10k km anyway (for easy driving) or short trips 5k km max.

 

5W-30 is more stable is correct description - if you drive only long trips over 1000km in one trip, then it may even last 15k or 30k.

Edited 31 October, 201510 yr by sniper29a

Most of guys in Czech Republic, even the guys who work for Skoda use Mogul 10W-40 over summer and then put 5W-40 or 30 according their driving style.

 

It is smart if you drive lots of kilometres because 10W-40 is half price of 5W-XX (of course it doesn't matter in UK since you don't have hot summers in first place)

Edited 31 October, 201510 yr by sniper29a

Can we get back to the oil consumption?

 

Get the tandem pump checked, it's a pump driven by the camshaft that both delivers diesel to the Pumpe-Düse element as well as vacuum for the brake servo, turbo vnt etc.

 

When this pump's internal seals fail, diesel and engine oil gets mixed.

 

Even high mileage 1.9 PD TDI's are not known for excessive oil consumption.

 

It could also be leakage in the turbo oil lines or the turbo itself.