Fully Synthetic Mag1 All Fleet CJ4 vs European Formula A3/B4

[berniedd]

Just collecting others' opinion here. Which would protect more/last longer before oil change is needed for my Toyota D4D diesel engine: Mag1 All Fleet Fully Synthetic CK-4 5W-40 vs Mag1 Fully Synthetic European Formula A3/B4 5W-40? Cost is not a factor here.

 

[Garak]

All things being equal, at least on TBN, the A3/B4 should last longer. However, there are other condemnation limits to consider, so things aren't necessarily that straightforward.

 

[zeng]

I would pick a CK4 over an A3B4.

 

[Kode]

Valvoline Premium Blue CK and SN diesel rated. 5w-40 . m Opinion