Oil grade for high mileage 1.8t

A3-Lee

A3-Lee

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As per the title I have a 1.8t Agu with 160,000 miles on the clock It has been oil changed every 6 months from new with 5w/30 fully synthetic but just wondering if I should start using thicker oil due to the mileage

Thanks
Lee
 
I was going to reply to your PM, but I can't stand typing in my phone.

I'd go with 10w40.
 
5W30 is used as part of the variable servicing regime typically... not a massive fan of it tbh and its like water when hot... great for getting a little bit more economy out of the engine but not so hot when 'hot' which turbo engines will get especially when tuned..

Use a good quality 5w40 fully synth and drop it every 6-9k miles or 12 months...

<tuffty/>
 
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lol three different replies in the first three posts.. Personally I use 5w40, and I live in a hot climate with 100,000miles on the clock.
 
5w is just to thin for high mileage 1.8t's.

I'm not even going to argue it because I can't be bothered.

First A3, 195,000 miles and it had never even had the head off it. Always run on 10w40.

Second A3, 130,000 miles. Faultless. Always run on 10w40.

My S3, almost 150,000 miles now and always run on 10w40. The day I picked it up it had a very low oil level, so I put a litre and a half of 5w40 in it.

Within days it started tapping and rattling from cold and then went away when warm.

Changed to 10w40. Perfect.

I'll never use a 5w oil in a 1.8t again.

10w40, changed every 6000 miles.

And that comes from on off ownership for 5 years, the best part of 100,000 miles in 1.8t's which themselves have clocked 475,000 on their original and unaltered engines and NEVER having an engine fault with any of them.
 
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I have always used 10w40 in mine Lee.
 
Depends what driving Lee does. Road or Track ?

Tuffty do you think 505.01 5w 40 oil is better than 504.00 5w 30 ?
 
Nobody will ever listen to you jardo because you're SO opinionated.

Hot weight is more important than cold weight.

I ran my old engine on vag spec quantum platinum 5w40 instil 216k and it never once sounded as ropey as any of yours ;)
 
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:blahblah1:

Blarrr blarrrr blarrrr.

I'll continue to run thicker oils in the hope that it prolongs the life of my constantly thrashed engines.

It's working pretty well so far.
 
Most 10w40 is
Gazwould said:
Depends what driving Lee does. Road or Track ?

Tuffty do you think 505.01 5w 40 oil is better than 504.00 5w 30 ?
Click to expand...

Depends on the definition of better...

I personally don't like 5w30 as an oil in a turbo engine... the wifes 1.25ltr Fiesta then fine but not a turbo engine..

I happily use Quantum Platinum 5w40 fully synth on my (effectively) brand new engine...

<tuffty/>
 
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Hot weight is important , but then is quality.

An oil with a higher grade synthetic basestock will outperform a lesser quality higher weight.

So a 40 could outperform a 50 and a 30 outperform a 40 .

Ester oils are the very best but are usually £55 - £80 for 5L .
 
Weather its right or wrong just thought id add that i bought 5/ 40 fully synth last year with new oil filter, been using it for a year on hard road thrashing (as you put it) & daily use, the mileage is 140k, no complaints from me or the car whatsoever
 
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<tuffty/> said:
Most 10w40 is


Depends on the definition of better...

I personally don't like 5w30 as an oil in a turbo engine... the wifes 1.25ltr Fiesta then fine but not a turbo engine..

I happily use Quantum Platinum 5w40 fully synth on my (effectively) brand new engine...

<tuffty/>
Click to expand...


I would use the above 505.01 on a new engine to help it bed in then switch to 504.00 5w 30 for better protection as it's a higher quality oil that outperforms 505.01 5w 40.
 
Gazwould said:
I would use the above 505.01 on a new engine to help it bed in then switch to 504.00 5w 30 for better protection as it's a higher quality oil that outperforms 505.01 5w 40.
Click to expand...

Depends on your definition of 'outperforms'... I change my oil every 12 months (5k or less) and I doubt it would matter for most service intervals of 6-9k miles either but it would be a cold day in hell before I put 5w30 in my engine...

I ran in using 10w40 mineral dropping it after the initial run in period on the dyno then after 300 miles of low boost but loaded driving without revving the engine out... swapped over to 5w40 after that and been running it ever since..

Found an interesting link on VAG oil specs though
http://www.oilspecifications.org/volkswagen.php

504.00 spec 5w30 is designed for the long life changes so by definition you could argue it 'outperforms' 505.01 but... its still 5w30 and its 'performance' is based on the assumption its going to stay in the engine for longer... both of these points mean its a no go for me even considering the fact if you used 504.00 on fixed interval oil changes suggesting that it shouldn't have degraded as much as the 505.01 its still 5w30...

Factor in things like track day use etc that can take oil temps well over 100 degrees then you have to base your oil change strategy on use rather than based on intervals...

<tuffty/>
 
Top draw ester oils those two along with Fuchs TITAN Pro S , Gulf Competition , Red Line etc .
 
<tuffty/> said:
Depends on your definition of 'outperforms'... I change my oil every 12 months (5k or less) and I doubt it would matter for most service intervals of 6-9k miles either but it would be a cold day in hell before I put 5w30 in my engine...

I ran in using 10w40 mineral dropping it after the initial run in period on the dyno then after 300 miles of low boost but loaded driving without revving the engine out... swapped over to 5w40 after that and been running it ever since..

Found an interesting link on VAG oil specs though
http://www.oilspecifications.org/volkswagen.php

504.00 spec 5w30 is designed for the long life changes so by definition you could argue it 'outperforms' 505.01 but... its still 5w30 and its 'performance' is based on the assumption its going to stay in the engine for longer... both of these points mean its a no go for me even considering the fact if you used 504.00 on fixed interval oil changes suggesting that it shouldn't have degraded as much as the 505.01 its still 5w30...

Factor in things like track day use etc that can take oil temps well over 100 degrees then you have to base your oil change strategy on use rather than based on intervals...

<tuffty/>
Click to expand...

Forgetting the LongLife element a back to back 505.01 5w 40 Vs 504.00 5w 30 oil performance analysis in terms of outperforming in the areas of wear , sludge , piston deposits and fuel economy ?
 
Gazwould said:
Forgetting the LongLife element a back to back 505.01 5w 40 Vs 504.00 5w 30 oil performance analysis in terms of outperforming in the areas of wear , sludge , piston deposits and fuel economy ?
Click to expand...

Too subjective for me to really care about tbh...

<tuffty/>
 
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I appreciate people's closed opinions , but all I seek is the truth for the benefit of the forum . Why wouldn't people want to know what is a better oil .

Too much misinformation and variables and lack of analysis has been applied to best oil /which oil debates .

So here it is ...

2014 09 23 165749



5w 30 , 504.00 507.00
fills more of the web than 5w 40 , 505.01 .
 
And how is that even remotely relevant to a high mileage 1.8t which could have worn in hugely different ways to the way those tests were carried out?

And how does that crap chart show any consideration for the OP's modified engine which will be running hotter, under more stress and used in a higher rev range than those test conditions?

Closed opinion, lol. You need to learn all the facts yourself before you go spouting out things like that.

If 30w oil offers better protection at a certain temperature then there becomes a point where the 40w will offer the same protection at a higher temperature point.

So what oil you use and most importantly what oil is BETTER cannot be defined by your chart but by your usage.

That chart is about as relevant to what oil is best for a high mileage 1.8t as me telling you what I had for dinner and how thick cheese sauce on my cauliflower happened to be at 60*c.
 
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16Klappe I could not learn the fact of a modified engine because the OP Lee hasn't stated it.

There is the the fact that's it's daily use and a hard road thrashing , I don't think this would entail any great length of time at full throttle on UK roads unlike a racing circuit .

Your S3 you said the day you picked it up had a very low oil level so you added 1.5 L of 5w 40 and within days it started tapping and rattling when cold . You then dropped it for 10w 40 which was perfect .

Too many variables , what oil was in there , how old , how long was it driven for at a low oil level , has any wear occurred that can be helped with higher viscosity oil.

OP Lee hasn't stated about any engine noise , he's happily been using 5w 30 (504.00 I pressume ) every 6 months , so based on the information should continue to use 5w 30 every 6 months .

He could of course use 5w 40 505.01 but as the Web chart suggests it would offer less protection.
 
No engine noise at any time on the 5w/30 just thinking of future proofing if anything ..... The engine is modified and is revved out when drove hard thanks for replys all
 
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Gazwould said:
I appreciate people's closed opinions , but all I seek is the truth for the benefit of the forum . Why wouldn't people want to know what is a better oil .
Click to expand...

Because its very subjective, along with the unknown and varied internal wear and tear
One size may not suit all in this discussion imho
 
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Exactly.

Nobody can claim that any oil weight is "better" for a general application because everybody has engines that get used in different way, have different internal wear an tear and hugely varying tolerances.

More than aware that I did at the start of this thread. Before the **** brigade roll in.

This arrived yesterday -

10636960_1552071271674715_5581409707838435670_o.jpg


Would I suggest every Tom, **** and Harry goes and fills up with a 10w60 triple ester oil. Hell no!

But for my very slack, highly abused engine that spends most of it's life at 100% throttle it should offer more protection in the conditions I drive under than the 5w30 you are suggesting is "better".

If you were referring to the quality of the oil rather than the weight then "better" can be used as a broad statement for the level of protection and lubrication offered. But the weight changes with every car and every driver. So there is no better. Only right or wrong.
 
I only claim and have proved 504.00 is better than 505.01 .

For a slack , highly tuned car that spends time at 100% throttle on a track the Millers CFS above is a great choice .
 
Millers and Opie say two very different things.

Millers say it is ideal for any engine which is regularly used on track where a 10w40 is usually specified.

Slack engine, always being thrashed, I'm sure it will be fine. :)
 
16Klappe said:
Slack engine, always being thrashed, I'm sure it will be fine. :)
Click to expand...

You must have bores like a wizards' sleeve :D

"It will be fine" is my favourite phrase, usually right after I pack some washers on a bolt that is too long or get the angle grinder out, lol.
 
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I was just thinking to myself oh god what have a started here lol and that's Jardo's choice Joe and you have to respect that I think your jealous really lol
 
I have always treaded my oil with slick 50 and swear by it helps prevent engine wear and And over heating used on all my vehicles even my bikes my A3 1.8t Quattro is on 165,000 miles and not a sound comes from her
 
125k 2002 plate, 225 BAM here Stage 2 custom code generic map, (with full supporting mods) running triple QX 5W-30 fully synth here - Bought 1 litre to top up recently after a long trip. Never had a problem.

Always used an engine flush "in a can" when changing oil. Had the car 9 years (1 owner from new) he had servicing done at Audi Teeside.


Last night & muchos reading across the net / forum... Bought 5 litres of 5w-40 fully synth (same brand).

  • Will change it in 2-3 months time / whenever it get low next. I agree, 5w-30 gets too thin at high temps.


It's all relative to our individual experiences.
 
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