Overheated tonight: Related to prior issue?

TrailBeast said
What is the entire makeup of your cooling system?

Hotter at freeway speeds is limited airflow, or circulation issue's (Flow volume)
Could even be a lot of crap in the block that could cause it.
Click to expand...

Makeup meaning...not sue what you're asking?

Engine was hot tanked. I flushed system out when all this started months ago. I use either 50/50 or distilled water.