If I asked for synthetic blend and got conventional should i worry?

I am pretty sure your car requires full synthetic oil. Blend is better than nothing but it has almost no synthetic in it.

You'll be ok. Just don't use 0w20, and change the dino 4x/yr instead of 2x/yr synth. Avoid semi-synth, as FOR said.

Of course. Most of the cars nowadays recommended using the full synthetic or synthetic blend. There is a huge difference between synthetic and conventional motor oil. you will face the issues in engine parts' lubrication and wearing.

Lubricity at temp is not a function of dino or synth. It's more important that you target viscosity appropriate to operating temps. The only exceptions are very hot-running turbos that lack sufficient cooling of their bearings. In that event synth will not "coke" in these passages. Since full synth is now down to $25 for TWO gallons at COSTCO there's no reason to chase dino anymore. This Kirkland house brand is probably sourced at Mobil1, which they still in 6-packs on sale for a bit more. No brainer, folks....