I respect what you say Marin.......I just don't agree with it.
You HAVE TO use Synthetic oil because of the many reasons in new cars.
No........no one has to do anything.......That thing freedom of choice.
The ones that have run the actual correct synthetic oils at the correct intervals........ have still had mechanical failure.
That is a fact!
That way they had problems at beginning of 2000 with oil sludge using regular conventional oil.
I disagree/agree with this because it was the interval also that was stated as acceptable verse the required use of the oil.
See....... I see the engine sump oil being used for the turbo as a direct design flaw, and main cause as you aforementioned for heat/sludge.
I think this should be an independent sump.
One more improtnat thing is driving those cars. Specially turbo engines. Those engines are high performance engines and they can not be drive low RPM. You have to drive those cars I can say kind of aggressive to not get problems.Driving low RMP it will built Carbon all over the intake.
I agree and disagree.
I agree that the engines will pool oil when synthetic and carbon up...... due to the high blow by, and the higher vacuum PSI that sucks it in at those lower RPMs.
The reason high RPM helps it, is because the combustion burn is with higher heat and clarity to burn the oil that leaked by.
I agree with below.
Reality........you openly admit this with your statement and lab report.
Oils become contaminated whether from fuel, water vapor, wear of components metals, heat, and the sludge as result.
You can't possibly disagree that these VW-Audi engines exhibit these problems even using the required specs of oil.
Just look at the engine failures as your guide.
I really like that Pentosin oil myself and agree that this oil is one if not the best on the market next to there mix blend.
Please explain why over 10 v8's Audi 2004-2008 cars I have in my care......... with the infamous timing chain issues....... have 200K with original parts, and oil filter never changed yet, oil dropped every 5K using 5w 30 oil SAE each time.
While others which did the oil change at the higher interval and full synthetic have needed those chains/adjusters, in addition to needing plugs and packs more often due to misfire and decarbonizing.
I put my money where my mouth was here I might add.......The deal was starting in 2003 if an engine failed with my customer below 150K I would buy them a new crated motor.
These customers I might add do everything I tell them to do and are not cheap.
In the end though they all saved a huge amount of money in my opinion, just were inconvenienced doing the oil changes more often.
Worth the time I think.
The reason I did this was due to the note/discloser I read on Audi and VW's website 10 years ago.
Was about specs of oils not being adhered to can a cause an accident or severe engine damage or death.
Talk about scare tactic to get everyone on board with a ridiculous cost to change oil and box out aftermarket/void warranty.
The result: The engines grenade prematurely anyway.
Anyone ever take an old 068 apart and see the cross hatches in the cylinders after 250K because I did?
All those ran on SAE and I never saw a cam journal wipe out or a cam lobe fail.........including running low on oil.
Fact: Reason for Late TDI Turbo charger......... NOX and OXS sensor failures along with particulate filter plugged......synthetic oil blow by and over filing as result of fuel in oil.
If exhaust gases can't vacate, they build up........... go elsewhere, than causing all kinds of havoc with a domino effect.