Looks like you're not the only one having the same issue. If it were me, I would take a small triangular file and put some crosshatch pattern on the dipstick then clean. Add the specified amount of oil to an empty pan, start engine, fill filter, shut off and let sit for an hour. Stick the dipstick in and check it and put a new full mark "small notches" on the side of the stick. Sounds like Toyota has the problem on a bunch of engines.

 

I tried first with some sand paper. I guess a file would have been better, but there is so much smeared oil, i'm not sure it would work. Im going to give it a try though.

I did drain everything, and added exactly 6.4. I was kinda worried I found an incorrect capacity.....but its the only number listed all over the place.

 

I have this trouble all the time with transmissions because you typically fill them through the dipstick tube.

When you pull the stick, immediately hold it horizontal. If you're lucky, you'll get something that looks like this.

 

I've seen some dipsticks with small holes in them that seem to trap the oil/fluid when submerged. I can't think of what vehicle and don't recall what type of oil or fluid was measured. It may have even been washer fluid??? I remember thinking it was a slick idea.

 

Many of the new vehicles no longer have dipsticks. Relying on an oil level sensor

Regarding your Highlander. Hit the dipstick with a wire brush to give the surface some tooth

 

Some toyotas have holes in the dip stick.

 

Drilling holes sounds like a good idea. I think i'll try that, and add some hash marks.
As great of a reputation Toyota has for engineering, they seemed to have missed the mark here....or a mark unreadable.

 

Many OE sticks just suck when they are a so long you have to stand in the next county over to read it.

If it has oil, i don't worry about it.

 

Speaking of that I may be able to pull the dipstick from my driver's seat in my F250

 

I find it easier to stand on a tall 3 step stool and as you pull the handle jump down and run to the end of the driveway all in one smooth motion. Best part about those is no oil, no start.