10k Mile Oil Change Interval after Turbo Screen Recall?

[DGr1FF]

I figured I would bring this up, since I haven't seen anything on it since the turbo screen recall. A lot of members here absolutely disagreed with Audi's specified 10k mile oil change interval recommendation. Many just simply don't trust changing every 10k miles, and also justified that stance with the turbo screen design flaw. Well, now that the design flaw has been "fixed", are we moving above 5k oil change intervals? Thanks.

[Yeoman]

If you drive normally and don't regularly track your car (and have done the screen recall), 5K oil changes are overkill given the quality of modern synthetic oil and filters. Oil analysis after oil analysis proves this.. It's certainly not in Audi's best interest to recommend oil change intervals that will be detrimental in any way to the engine if they wish to keep their customers. Even oil companies recommend longer intervals. and they have the most to lose.

[paul-g]

as for oil i go every 7k my car sees the highway more than city driving, if you get good oil and good filter shouldn't be an issue. I believe oil can handle things at 10k maybe even 15k under normal driving but i just don't think filters can <--my 2 cents which is worth only .5

[Krystofer66]

I am working with a company now to do an oil bypass filter. I want to remove the oil screens completely and do a bypass filter system. These systems have been proven to give most oils 20 30 or even 100k miles. Cost is looking to be around 800- 1000 plus install. Ill make a thread if i ever pull the trigger.

[Valpo A7]

I am working with a company now to do an oil bypass filter. I want to remove the oil screens completely and do a bypass filter system. These systems have been proven to give most oils 20 30 or even 100k miles. Cost is looking to be around 800- 1000 plus install. Ill make a thread if i ever pull the trigger.

$550 for a kit from JHM

https://jhmotorsports.com/stainless-...8-s8-4-0t.html

[Botbasher]

$550 for a kit from JHM

https://jhmotorsports.com/stainless-...8-s8-4-0t.html

I think he's talking true bypass... not screen relocation.

Bypass Oil.jpg

Correct Krys? That's going to be a lot of plumbing in a really tight spot!

Interested in seeing what you come up with!

Good Luck!

KS

[Alabama]

I think he's talking true bypass... not screen relocation.

I think I asked this question (true bypass) in another thread and the AZ engineers who responded did not think it would eliminate the turbo damage problem. I think qcrazy and gk1 have been disassembling their full flow filters to see what's being caught.

[gk1]

IMHO the 4.0T is just just a filthy motor. At least engine oil-wise.
Where the filth comes from IDK exactly, but I feel it manifests itself in bits of carbon and debris that you can seen in the filter and obviously the screen.
If 5k intervals helps keep the oil cleaner in any way, again IDK, but it is what I have done since new and it doesn't really bother me.
When my screen was removed it was not as bad as some I've seen and whatever debris was there could have honestly just been from when the mechanic removed it. It also washed away with great ease and looked brand new afterward.
Can that be attributed to 5k OCI, maybe, but others on here have indicated they do 5k intervals and their screens looked real bad. (shrug)

[Botbasher]

I think I asked this question (true bypass) in another thread and the AZ engineers who responded did not think it would eliminate the turbo damage problem. I think qcrazy and gk1 have been disassembling their full flow filters to see what's being caught.

I would not think it would help in the larger scope, but new ideas come along all the time! Could also depend on placement in the flow to help catch more then not.

The one great advancement I found in my quest for "forever" oil was when I was able to use Canton Oil Filters elements (cartridge replacement for spin-on). I started using them on a 1.8L JH Block and even at 10k miles my oil looked like I just poured it in. Not exaggerating... it was honey brown at 10k! Blackstone said oil was still perfect and said that it had at least 5-10k more in it! They were a true 8 micron filter where most OTS filters are ~40 micron

Unfortunately they only have a few options that cover standard spin-on filters... nothing for more exotic filter designs.

I pulled my S6 filter element apart on my initial change. Unknown age or mileage. There was nothing obvious in it. Black and silty but no chunks or other nasty!

Cheers,

KS

[MattyMarkey]

I would not think it would help in the larger scope, but new ideas come along all the time! Could also depend on placement in the flow to help catch more then not.

The one great advancement I found in my quest for "forever" oil was when I was able to use Canton Oil Filters elements (cartridge replacement for spin-on). I started using them on a 1.8L JH Block and even at 10k miles my oil looked like I just poured it in. Not exaggerating... it was honey brown at 10k! Blackstone said oil was still perfect and said that it had at least 5-10k more in it! They were a true 8 micron filter where most OTS filters are ~40 micron

Unfortunately they only have a few options that cover standard spin-on filters... nothing for more exotic filter designs.

I pulled my S6 filter element apart on my initial change. Unknown age or mileage. There was nothing obvious in it. Black and silty but no chunks or other nasty!

Cheers,

KS

A few people have done a blackstone oil analysis with the 4.0t, someone doing progressive testing at 5/7/10k mile increments. Blackstone came back with pretty much what you stated at 10k; oil was great and could go for 5k more miles. This was without special oil filters and bypass systems.

Simply stating there are clearly situational and specific vehicle differences, likely based on where the car lives(environmental factors play a bigger role than some think), gas and oil used, prior maintenance, etc.

[Botbasher]

IMHO the 4.0T is just just a filthy motor. At least engine oil-wise.
Where the filth comes from IDK exactly, but I feel it manifests itself in bits of carbon and debris that you can seen in the filter and obviously the screen.

In wondering this same question with other IC motors and oil quality systems I have used in varied careers, I found the filth comes from basic filtering issues (~40 micron on auto filters) and temperature abuse in most cases of healthy motors. My "tests" were run on motors with better than 180psi compression, so blow-by was not a primary contributor.

In the ^ post, I started using a HUGE oil cooler (almost 2L of volume!!) on a 1.8L motor that I regularly drove at it's limits. At 5k miles, the oil was visually dirty, but it had viscosity more on par with new oil than used. On long downhills, I could easily see temps below 140F. On those same uphills, the temps barely got above 210F even at full tilt (same hill hit 240+ before the cooler!).

Then I took on the filtering aspect of the problem and started using Canton 8 micron filters. At 5k it was actually hard to see on the dipstick. At 10k it was honey colored and still 100% effective according to Blackstone. I ran it to 15k and finally gave up and changed it simply because it felt wrong to go more. I think it would have been a 20-25k oil interval!

I think the 4.0tt motors cook the oil really bad. They take forever to warm up and stay hot a long time after pushed. I see 220F's after hard pulls and that's not what the temp is within the motor itself! When I did the oil screens, there was lots of burned oil in the valley. It smelled bad... real bad! I don't think there is a real way to combat that in this design. We can cool the oil more with larger or improved coolers, but it'll still sit in the valley and cook!

The filtering is almost as hopeless. Unique OEM filters (Ours is only used in Audi and Bentley 4.0t motors) mean lack of options from suppliers like Canton who make amazing and effective filters!

I'm still looking at the options that might help us with this motor, but it it doesn't really have a lot of possibilities at a quick glance!!

Cheers,

KS

[Krystofer66]

Yes Correct

[Krystofer66]

Is there any concern from lack of flow with a lower micron rating filter?