Originally Posted By: Jeffs2006EvoIX
Im curious too how the UK guy in the Audizone site says that he would use a 504 oil before using a group 3+ oil? Arent most 504 oils group 3+ oil?
Im curious to who this guy works for. I mean, if it was that simple to say, use a product like Redline, or some group 4+ oil and you will have less issues. I just find it hard to believe its that simple. If it was,I would just start using Redline 5w30 that they recommend for my GTI.
I think there is more to it than that though. Additives themselves must have something to do with the carbon build up because having less of them proves 40% less deposits. Sure Lubrizol is a company that sells additives, but they also showed the proof, wasnt hearsay.
The guy in the Audizone posts also said that there needs to be a coating on the valves to prevent the carbon build up? They do have a special coating. That is the VW patent I posted I think on the first page. That coating is supposed to resist carbon deposits and to clean them you simply do an Italian tune up every so often to clean the valves.
All this makes me curious. Very curious.
Jeff
I think his reasoning is bcs 504.00 is blend of several base groups and not only that, due to very strict requirements, base oils are carefully selected.
if you remember, Lubrizol in the table says that VW505.01 which was approval for previous generation of VW diesel engines is Group 3.
On other hand, table says that VW504.00/507.00 are Group 3, 4 and 5. I think it is because it is ahrd to achieve what VW requires only with Group 3+.
Looking at the M1 ESP numbers it is hard to believe that it was made only of Group 3+ without using Group 4 and 5, especially very good pour point and flash point. Also, Pentosin on the German web site says that their VW504.00/507.00 is made from Synthetic based oils, while on same site their VW505.01 is advertised as HC oil.