Oil is like a religion, wanna start a discussion just ask what is the best motor oil or transmission fluid.

 

I get 25+ on regular doing 70-80 - seems I DIDN"T have the flash!

 

Car on the highway, regular and that speed, sounds as good as it gets. Lack of documentation online and that mileage argues it was not flashed (which I think is a good thing). As a side note, pat attention to that upper "dog bone" engine mount/torque strut. They tend to crack in the center with age and use and make shifting worse and vibrate at idle. OE one has dust covers on it you have to peer behind to see the inner rubber donut.

 

Upper engine mount is tight.