C3 vs A3/B4 in vehicles without an exhaust particulate filter

[BillyE]

Is the primary reason for choosing C-series oils over A/B oils the compatibility with DPF/GPF?

 

[kschachn]

https://360.lubrizol.com/Specifications/ACEA-Passenger/ACEA-2016/ACEA-C3-16

ACEA C3-16
ACEA C3 oils are Top Tier lower SAPS1 lubricants. They are designed for use in high performance gasoline and light duty diesel engines where advanced aftertreatment systems such as Diesel Particulate Filters (DPFs) and Three Way Catalysts (TWC) are used.

 

[chris719]

Is the primary reason for choosing C-series oils over A/B oils the compatibility with DPF/GPF?

Yes, but you can use C3 in a car without a PF. Some will bring up a potential reduction in valve deposits but I don’t really think it’s a big factor unless your engine is known for bad carbon buildup.

 

[kschachn]

Yes, but you can use C3 in a car without a PF.

Yes you can.

 

[fantastic]

Is the primary reason for choosing C-series oils over A/B oils the compatibility with DPF/GPF?

Yes, it's mainly for emission reduction. If you have dpf/gpf and want to extend the system life.