QUOTE(6UE5T @ Dec 22 2017, 05:54 PM)
What is the TBN value? Longer OCI usually is also dependent on TBN value. For example oils that claim can last for longer mileage (>15k km, some even >20k km) usually have TBN value >10 or even >11, such as Amsoil or Mobil 1.
CMIIW though.
Agree with your statement above generally.CMIIW though.
The A3B4 has a minimum TBN of 10.
Whereas a SN GF5 has TBN from 7.x to 9.x generally , though strong additive package SN GF5 may have TBN of 10 and above.
Without TBN values from their respective spec sheets, I would speculate Magnatec Stop-Start 5W30 A3B4 most likely has higher TBN with its stronger additive package.
Hence my belief Castrol can last longer, IDK.
Dec 22 2017, 06:32 PM

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