Just to make sure, you saw it clean recently? It looks like a decent amount but is it possible that was just run off from a messy drain/fill? It sort of looks like it starts at the fill plug..
This was going to be my approach as well but I chickened out. I felt fine about drilling the massive fender hole but between the air bag and virtually zero chance of reversing the A-pillar holes, I wanted to explore other options.
I read about several Tacoma guys using double sided 3M vehicle...
I did everything with the plastic overfender attached to the metal fender. The template doesn't really allow you to cut it separately.
(Again this is in reference to the Safari snorkel.)
The Dobinsons snorkel likely similar installation to the Safari snorkel. Yes you do you have to cut through both the plastic and the metal piece to create the oval shape.
Don't worry too much about being 1000% precise. Get it as close as you can and go for it. The drilled mounting bolt holes...
I had that similar thought but the weight of the skid plates will either cancel out that tiny aerodynamic advantage or (more likely) worsen the overall MPG.
4WD V6 here. I went with 5100s (set to 0" lift) + OME 884 and really happy with it. I've had it on for 5 years now and wouldn't change it.
For the V8 I'd go to 885 or 886 if you want to maintain a very slight engine-side-down rake. It looks like OME 887 gets you level.
The description sounds very much like an exhaust heat shield issue.
A far fetched second idea is possibly a rotted out line slowly leaking causing transmission fluid level issues.
But really, I'd bet 99% chance it's a heat shield.
As much as I like the "OEM/OEM Plus" approach to modifications, the aftermarket has some nice head unit options that blend in nicely. Not to mention, Apple Carplay and Android Auto are really nice to have.
If you go down the aftermarket route, grab one that has a capacitive touch screen...
I took the lights out of the Limited running boards (with the pre-attached wiring), drilled a hole in them, and bolted them back up where the running boards were. That way I still get some ground lighting when I lock/unlock/open doors.
Note: I replaced the original bulb with LED to get a...