Originally Posted By: bobbydavro
Wow you guys.
The changes are within the repeatability of the test and you are claiming 'obvious issues' forcing formulation changes.
Also why would deposits form on the exhaust values due to it being DI?
There is Lubrizol study here somewhere (have it at work computer) with High-SAPS and Low-SAPS oil test in DI engines and carbonization of valves.
DI engines, no fuel flush over valves. First generation of VW FSI/TFSI engines were particularly problematic. In Europe it is not big of a deal due to different burn, and ULSG, which allows lower SAPS oils to be used (VW 504.00/507.00).
Add to that high NOACK oils (like Castrol 5W40 that VW uses in dealerships) and you get bill once you hit 60-80K with car for cleaning valves from carbon. Audi S4 V8 and Audi 3.2 V6 were particularly horrible when it comes to carbonization.
High TBN in FS might be mitigate with low NOACK, but we do not know what is NOACK of new FS.
Also, FS is on the market for like 6 months, and to change formulation in such short period is really strange to say the least. Not impossible, but why?
As for ESP, yes it was available in EU, but suddenly Mobil1 offered pds for the U.S. market on their web site.
Wow you guys.
The changes are within the repeatability of the test and you are claiming 'obvious issues' forcing formulation changes.
Also why would deposits form on the exhaust values due to it being DI?
There is Lubrizol study here somewhere (have it at work computer) with High-SAPS and Low-SAPS oil test in DI engines and carbonization of valves.
DI engines, no fuel flush over valves. First generation of VW FSI/TFSI engines were particularly problematic. In Europe it is not big of a deal due to different burn, and ULSG, which allows lower SAPS oils to be used (VW 504.00/507.00).
Add to that high NOACK oils (like Castrol 5W40 that VW uses in dealerships) and you get bill once you hit 60-80K with car for cleaning valves from carbon. Audi S4 V8 and Audi 3.2 V6 were particularly horrible when it comes to carbonization.
High TBN in FS might be mitigate with low NOACK, but we do not know what is NOACK of new FS.
Also, FS is on the market for like 6 months, and to change formulation in such short period is really strange to say the least. Not impossible, but why?
As for ESP, yes it was available in EU, but suddenly Mobil1 offered pds for the U.S. market on their web site.
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