23 minutes ago, ahenners said:

 

I must have been unlucky, when I got rid of my 59 Petrol VRS at 80k it was using 1L per 1500 miles! Oh well, I haven't missed it, the MK3 is much better.

 

MK3 hasn't needed any top ups between 10k services so far.

 

Did you have the Mk2  when it was new? If so how much oil did it use in the first few years?

Just now, juan27 said:

 

Did you have the Mk2  when it was new? If so how much oil did it use in the first few years?

 

No was bought approved used at years old and 40k. I don't recall the oil consumption being that bad up until about 55k then it seemed to get progressively worse.

48 minutes ago, juan27 said:

I think my experience has been abnormal rather than lucky.

Corrected for you

33 minutes ago, SWBoy said:

Corrected for you

 

Nah normal as in normal that my oil doesn't evaporate after 5000 miles.

7 minutes ago, juan27 said:

Nah normal as in normal that my oil doesn't evaporate after 5000 miles.

I didn't say it would ALL evaporate, just that the rate of evaporation steadily increases as the oil gets contaminated by fuel and hence the rate of oil consumption increases, with this more noticeable as the distance driven since oil change increases above 5000 miles.

Well oil technology should have moved on, in leaps and bounds, but few claim 30,000 mile service intervals are possible with long life oils other than when confusing km & miles.

 

So 20,000 mile intervals to suit Fleet / Lease and cars in Manufacturers Warranty.

http://volksw3agen.co.uk/owners/servicing/regimes 

Now new oils for Hybrids, lighter and going to give better MPG supposedly as many went years ago with 0W 30, 

around the time Euro 5 was introduced and the MPG dropped from Euro 4 emission vehicles.

 

Now VW having VW508 00 spec, and yet some engines use as much oil as a 2 stroke.

Use oil, use Ad-blue and use more fuel doing regens, and use ECO tyres.

 

Real Progress, 

Diesels did 50 plus MPG 20 years ago with 12,000 mile oil changes, and no oil use between servicing.

 

 

Edited 13 April, 20188 yr by Offski

5 hours ago, juan27 said:

 

Before coming to Skoda and variable servicing over a 25 year period with various cars (owned from new and properly serviced) on 9-12K intervals I very rarely had to add oil between services.  

 

Until last year I ran a  2010 petrol Mk2 VRS from new for 80K on variable (16-18K in practice) and oil consumption for the first 4 years was negligible, rising to about 1L/8,000 miles at the end of my term of ownership.  

My petrol vRS Mk2 (also owned from new and to 80k miles in 7 years) did almost exactly the same. 

 

Hardly any oil used for the first 50k miles. Then suddenly started using oil. When I sold it, it was using at least 1/2 litre every 1000 miles. 

 

Hope my Mk3 doesn’t follow suit. 

18 hours ago, SWBoy said:

I didn't say it would ALL evaporate, just that the rate of evaporation steadily increases as the oil gets contaminated by fuel and hence the rate of oil consumption increases, with this more noticeable as the distance driven since oil change increases above 5000 miles.

 

I must admit I've never heard of this evaporation due to routine fuel contamination as a significant factor in needing to top up engine oil.

 

Do you have a link with info on this?

45 minutes ago, juan27 said:

Do you have a link with info on this?

If you Google "oil evaporation rate in engines" then you get several links including this one https://www.amsoil.com/newsstand/motor-oil/articles/what-causes-an-engine-to-burn-oil/

 

Interesting article and makes a lot of sense.  Thanks SWBoy.

I'm still unclear as to why diesels are 'oil burners' - in accordance with this article are the engines run hotter than petrol so more evaporation - or is more oil allowed to pass the pistons/valves due to higher compression? ... or something else?

1 hour ago, SWBoy said:

If you Google "oil evaporation rate in engines" then you get several links including this one https://www.amsoil.com/newsstand/motor-oil/articles/what-causes-an-engine-to-burn-oil/

 

Sorry not convinced by that which is basically an advert trying to get the reader to change to synthetic oil which we mainly use already! 

 

Not exactly scientific.

 

I can't find much else using the search suggested that supports evaporation as a major cause of oil loss, especially compared to leaks/burning oil.

 

Then there's your suggestion that the oil is contaminated by fuel causing evaporation. This would suggest significant volatile elements from the fuel getting into the oil. (That is effectively unburnt fuel). How would that happen in a car working correctly?

 

Even if these volatile fuel elements were getting into the oil they would increase the volume before being the part of the mixture that evaporated.

 

Soot  does get into oil from combustion making the oil dirty and eventually sludgy but surely not unburnt fuel?

 

Edited 14 April, 20188 yr by juan27

5 minutes ago, Hermit said:

I'm still unclear as to why diesels are 'oil burners

Diesel is classified as an oil

7 minutes ago, Hermit said:

Interesting article and makes a lot of sense.  Thanks SWBoy.

I'm still unclear as to why diesels are 'oil burners' - in accordance with this article are the engines run hotter than petrol so more evaporation - or is more oil allowed to pass the pistons/valves due to higher compression? ... or something else?

 

They are oil burners because the fuel is heavy oil, not because they burn engine oil.

 

 

2 minutes ago, juan27 said:

Sorry not convinced by that

OK, believe what you want.

My Mk2 diesel used oil steadily, perhaps a litre per year, when I was on variable interval servicing, over 17,000 miles max.. I always liked to keep it topped up to the max especially if I did a long run to Scotland and back, and bought 5l of oil.Ran to 140, 000 miles before trading it in for

my current Mk3 1.4tsi.

Luckily the same oil can be used for topping up, my annual mileage is now much lower, but I have topped it up.

On ‎12‎/‎04‎/‎2018 at 21:50, Offski said:

VW Group have been giving this backside covering information for a long time, and it is not 'within tolerances' and does not let them off any hook 

when Official Oil Consumption tests are required, they get away in Europe with it sometimes, not in the Rest of the World though.

 

Supposedly a 'Professional' did this Oil Consumption test and yet does not know what a litre of engine oil weighs.

Nice even tyre wear.

If the tech thinks 1 litre of engine oil weighs 1,000 grams do you think that was an accurate tyre tread depth?

6 minutes ago, Offski said:

If the tech thinks 1 litre of engine oil weighs 1,000 grams do you think that was an accurate tyre tread depth?

That's why I made the comment because i'm normally easy on tyres due to 75% motorway mileage but even I usually get front tyres down to 6mm from 8mm new during 10,000 miles and rears down to 7mm, so thought someone had swapped tyres at say 5,000 miles.

Who knows, who cares, the car needed a new engine. Maybe the owner worked as a tyre fitter.

20 minutes ago, Offski said:

If the tech thinks 1 litre of engine oil weighs 1,000 grams do you think that was an accurate tyre tread depth?

I bet that was a messy job weighing all that oil. Hope they replaced all the fuel they used on the near 200 mile road test!

Not messy when a profession sucking out the oil.    All the gear and something between the ears you hope...

Or even draining and weighing.

 

For the past few years the 300km  / 186 miles is driven by the owner / keeper and they return to have part 2 carried out,

between the OIi filer and dip stick are sealed. (sometimes)

VW / Skoda / Audi / SEAT pay your costs if it is a Warranty claim, you just ask, you ask for the extra oil you have been buying you supply the receipts.

 

With the old Dynamic test was done the fuel was paid for by VW Group as well, and a technician drove the car.

Drain off or suction off engine oil.doc

Edited 19 April, 20188 yr by Offski