JHZR2
Staff member
Originally Posted By: OldBaldy
But this does NOT imply that the 504 oils are or will be worse than any early 502 spec oils, when used with the USA OCI!
Again, look at my data. Our 08 rabbit, per the OM, is specced to do 10k mile OCIs. 504 has provided good wear rates in UOA at 5k miles, but the TBN is depleted fully. A 504 oil will NOT be suitable for 10k mile OCIs at this time, given fuel quality. Period.
It isnt a matter of if 504 is better/worse than 502. Ill bet that in terms of wear control and other things, that 504 is better than 502. But unless you want to take your chances when TBN crosses below 1 at 5k miles, be my guest. Up until then 504 performs admirably.
It is no different than BMW LL-04. It is OK for gassers in Europe. It is OK for diesels there and here. It is NOT OK for gassers in the USA. Will it perform admirably up to a point? Im sure. Doesnt make it the right oil.
But this does NOT imply that the 504 oils are or will be worse than any early 502 spec oils, when used with the USA OCI!
Again, look at my data. Our 08 rabbit, per the OM, is specced to do 10k mile OCIs. 504 has provided good wear rates in UOA at 5k miles, but the TBN is depleted fully. A 504 oil will NOT be suitable for 10k mile OCIs at this time, given fuel quality. Period.
It isnt a matter of if 504 is better/worse than 502. Ill bet that in terms of wear control and other things, that 504 is better than 502. But unless you want to take your chances when TBN crosses below 1 at 5k miles, be my guest. Up until then 504 performs admirably.
It is no different than BMW LL-04. It is OK for gassers in Europe. It is OK for diesels there and here. It is NOT OK for gassers in the USA. Will it perform admirably up to a point? Im sure. Doesnt make it the right oil.