grimwerk: I was only half-serious when mentioning the CVT, it just seemed to suit your tastes. Really, though, don't fret about how an engine
normally behaves at highway speeds. Most cars are designed to be happiest with constant highway driving. Since you seem to be in the market for a used vehicle, the plus side is you'll be able to find lots of information about reliability.
Thanks, but don't be fooled by thinking what most cars are designed for..... their designed for making money and if they can get away with screwing the consumer without them realizing, of course they will - hence the reason 3 speed auto's exist!
Some more reputable car manufacturers will let you know that a car is designed for the city and not the hyway, hence the use of the word 'metro' or something similar in the name - most do not.
My first car when i was young was a 74 Torana - that is the sports model Holden of the 70's. But it was a real piece of shit - which a first car normally is. You won't believe some of the dodgy things with that car, oh boy.... one time i was at the supermarket and suddenly the fan belt started squealing something shoking! I checked and saw the rear bearing on the generator had siezed so i removed the bearing and solved the problem. The generator had long since stopped working before that anyway and i was charging the battery with a charger every week. However, after removing that rear bearing i did not realize that i had given an escape route to the internal section of the generator and several weeks afterwards i was driving down the street and heard a big clunk thud bang then saw it rolling behind my car and nearly took out an old lady walking down the street! Now it must have been a remarkable sight to see a large mechanical part fall out of an engine and the car keeps on going!! hahahaha
Other things - i had an old rolled up sock 'stickitaped' to the engine for an oil cap,
there was a big hole in the floor where i could sweep all the dirt out,
Somone stole it and left it in a creek, we got it out and it still kept running after drying out!
One time the headlights high beam switch broke (the old floor switch) and the headlights stopped working, so i had to pull the wires and my freind had to hold them while i was driving and it was burning his fingers and he would let go and i would shout "lights, lights" so he had to keep holding it again.....
one time a mechanic looked at the 'points' and said "i don't know how this car can be running, it should not be possible".
Oh how i loved that car!
Edit: Oh and i forgot to mention how you always had to keep all the windows open because of the smoke coming in under the dashboard.... and although the car did not blow much smoke while driving normally, if you suddenly accelerated, a huge cloud of black smoke would bellow out the tail pipe - very handy for tailgaters!