On my last car, I ran all Amsoil full-synth.
However, I discovered (the first/sales dealer didn't even tell me about this!
) that my car has the 30K maintenance plan - which covers 4 oil changes in that time period. Those are done with Motorcraft Semi-Synth.
Now, I had them put in full-synth last time (and paid the $20 surcharge) but I'm curious what you guys think... should I just stick with the semi while it's free to me? Especially since it'll be changed every 5K or so since I have 15K on the car and 3 freebie changes remaining...
Once the plan expires, I'll probably start doing my own Amsoil changes again.
2012 Focus Ti Hatch | Ingot Silver | 401A, Nav, Winter Pkg, Moon Roof, Parking Tech. Pkg
Build Date: 12/2/2011 | New APIM: 4/4/2012
MFT: Factory v2.11, 3/14/12 Web -> v3.0.2, 9/24/12 Web -> v3.2.2, 1/24/13 Web -> v3.5.1, 8/13/13 Web -> v3.6