Punky_686

What's the difference? My manual states the oil i have to use is the WSS-M2C945-B1 spec but i can only find one oil that meets that requirement (locally anyways) but it's a high mileage motor oil... i know it would work but my truck only has 2000km so the oil i'd assume wasn't necessarily designed for new engines

But lots of other oils have the WSS-M2C945-A which doesn't match the "requirements" for mine


2018 F-150
5.0 V8
TIA

doyall

My 2018 5.0L manual specs the "A" oil. Yours must have been made later in the model year. The recent "B1" spec is a lower calcium formulation to theoretically prevent low-speed pre-ignition (LSPI), primarily in small displacement, forced induction, direct injection (i.e. EcoBoost engines) applications. I guess that they are merely attempting to consolidate the specifications as the 2018 5.0L is now a dual MPI-DI engine. The "B1" spec will begin appearing on more and more oils in the immediate future as it is akin the Dexos 1 Gen 2, SAE SN+ formulations being sold. FWIW, my first and only oil change was done with the D1G2, SN+ formulation (more or less B1) oil which three months ago carried the "A" spec. Within the next three months I would bet current production of that same oil will carry the "B1" spec. Either the "A" or the "B1" spec will suffice for your needs.