For leather, I haven't found anything better than Leatherique products... Expensive and a real pain in the butt if you decide to give the oil a go, but the stuff delivers great results. Pristine clean is what I use most of the time (the oil is maybe a once a year thing for me).
For vinyl stuff, I usually wipe it down with a damp microfiber and call it good or apply a little 303 aerospace protectant.
Interesting... How would you apply the Vasoline? Is this what you've done on your car? Do you have pictures of how your car has held up over time using Vasoline on the seats & dash?The only thing you need for your dashboard is a cheap tub of Vasoline. Anything else is just a placebo and wastes your money. Same goes for seats, but you probably don't want to sit on that, unless you get it rubbed in nice and well so that it doesn't come off on your clothes. All these "products" for your interior either do nothing more than plain old Vasoline or actually harm your material long term (such as Armor All) by drying it out.
Interesting... How would you apply the Vasoline? Is this what you've done on your car? Do you have pictures of how your car has held up over time using Vasoline on the seats & dash?
The alcantara is the same material as in the headliner. IMHO, don't put any product on it, rather, just dust it off and you're good to go. When I dust the leather part of my dash with a very lightly damp and clean rag every time I wash my MS, I let that same rag rapidly slip over the Alcantara section. I don't let it dwell, so it never gets wet, but dust is whisked away and it continues to look as good as new. Simple.What works best on the velour looking material? I'm not a big fan of that "look" really to being with, and it looks like it will be a dirt magnet.