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Originally Posted By: Brit33 What to use in an old boxer engine then? Specs 10w40 or 10w50! Clearances are not tight like on a modern engine. Block flexes at high revs. I use 15w50. Would you use anything thinner? 5w40 maybe. Idle hot 10psi but at higher revs it reaches a healthy 60 psi...

Originally Posted By: dparm I guess I understand the logic of using 504/507 here but if this is a US car under warranty in the US, I'm inclined to say that 502/505 is what needs to be in there. Look at it this way - VW/Audi doesn't say you have to use a 502/505 oil, it says you have to use an...

Originally Posted By: redrocker55 Thank you for the responses guys... So now that I know how to post...here is the entire history of my engine so far. All UOA are via Blackstone. The factory fill was rumored to be Fuch's 5w40. The second UOA was German Castrol. The third UOA was AMSoil...

Originally Posted By: dparm Not sure why we're even talking 504/507. It's under warranty = do what the mfg says. Because 504/507 is warranty approved, and is specified for the direct injection engines in Europe, and are shown by Lubrizol to cause 40% less intake valve deposit in direct...

Originally Posted By: dbrowne1 The main concern seems to be that the TBN of these 504/507 oils starts much lower, and that NA fuel (with its ethanol and higher sulphur) could deplete to a dangerous level rather quickly. I'm planning on running a 5K mile OCI regardless, which I think is safe in...

You should check out the Euro IV compliant VW 504 oils, not 502 - they are low SAPS oil that have lower volatility as well. Lubruzol published a study a few years ago showing 40% lower intake valve deposits in direct injection engines from using a Euro IV low SAPS oil.

Originally Posted By: dbrowne1 2. One of my criteria is 502.00 approval for warranty purposes, so Amsoil and Redline are out. It needs to be on the official list, not just "formulated to meet." Here's the secret - you really want a VW 504/507 oil, not VW 502. 504 is a superset of 502, and...

Originally Posted By: gdawga4 This is my first UOA on the S4. A little history...I bought her with 68k miles in June '10 and is currently at 90,xxx. She consumes oil, unfortunately. The service records never indicated the previous owner complained about oil consumption. Consumption ranges from...

Originally Posted By: Steven_Oakes Hi All, I know this is an old thread.. but wanted to contribute. I am from Australia and own an Audi A4 2005. This issue is definitely caused by oil ingestion through the intake manifold via the PCV system. It doesn't matter what oil you use. Ive owned...

Originally Posted By: Kestas The VW oil requirements have always mystified me. I'm never owned a VW. In general, what oils are they excluding? Why? What will happen if you use a non-approved oil that otherwise has the proper starburst (SL or SM) rating? VW does not care about the API starburst...

Originally Posted By: fredf I intend to use GC 0W-30 but will be happy when VW 'officially' answers my email saying this is ok. VW has "officially" approved GC 0W30, loooong ago - VW and Audi regularly publish on their web sites the list of approved oils that meet their various specifications...

Hello, I recently joined the forum, after reading occasionally over the years. I've started paying particular attention to the DI engines, especially Audi's, as I have a 2010 S5 on order with the 4.2 FSI V8 engine. I didn't see this discussed in this thread or other Audi DI threads, so if I...