I was looking at the Lubrizol relative performance comparison tool and it appears VW 504.00 is the best performance spec of them all, plus it is emission system protecting low SAPs. Oil meeting that spec is Mobil 1 ESP 5W30 and 5W40 available at PEP Boys. Is this the best oil or what?
Oil specs
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Originally Posted By: mechanicx
Oil meeting that spec is Mobil 1 ESP 5W30 and 5W40
These are low SAPs oils with rather low TBN. Normally in other parts of the world this would not be a problem, but the poor quality ethanol fuel that we use here in the US wreaks havoc on such oils causing the TBN to be depleted rather fast, hence, they should not be used for extended oil change intervals. Why then pay a premium price for this oil if you're going to have to change it early?
But if you need a good oil for your modern diesel engine which will not harm DPF, then these oils are a good choice.
Oil meeting that spec is Mobil 1 ESP 5W30 and 5W40
These are low SAPs oils with rather low TBN. Normally in other parts of the world this would not be a problem, but the poor quality ethanol fuel that we use here in the US wreaks havoc on such oils causing the TBN to be depleted rather fast, hence, they should not be used for extended oil change intervals. Why then pay a premium price for this oil if you're going to have to change it early?
But if you need a good oil for your modern diesel engine which will not harm DPF, then these oils are a good choice.
That's a good point, but I wonder just how fast its TBN drops? Probably not as fast as typical SM dinos? The reason for using it is if you overlay VW 504 againt any other spec, 504.00 gives you way better relative performance. I't wear rating is 10.
I think there may have been some used oil analysis posted of Mobil 1 ESP that would give you some indication of how quickly the TBN gets depleted.
Is it super fast, or can it go to say 6k or so? Also, does it harm the oil in any other way besides TBN?
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