I wouldn't use anything petroleum based, but perhaps something more like sil-glyde. 

I received an order from Amayama last week, split between Japan and UAE warehouses. I can't believe how cheap S&H from UAE was. Packing was great. Shipping time was good. Excellent option for us. 

Only sti specific stuff I know of is DCCD and G-force sensors.   working on some PCB design bits and updating to use the newer canbus chips.   Adding a thermocouple circuit as a test and they cost way to much.

Something rectangle that sits in the top 1/3rd of the vents would be cool, like a P3 gauge but with more specialised info available. Having DCCD there would be cool 

f*** it just get one from Pickapart, they're like $40.