Sounds like it could be a bad thermostat - not closing to allow engine to heat to normal operating temperature
This is probably an indication that your thermostat is stuck open. Go to a radiator shop and ask them to test it.
It should take you a little over 3 minutes if you travel at 40mph constantly
70m/40mph = 1+3/4 hours total if speed is a constant 40mph (70m-30m)/40mph = 1 hour remaining with above conditions met
It's about 13 hrs. and 15 min. if your traveling 40mph
18 F
It is traveling at about 58.66 feet per second.
Yes, you can be, but speeding like that is considered normal in most circumstances and may be overlooked.
its the trany going out.
40mph is about 64.3km/h
40mph = 64.3738kmph
The knocking problem you are having is most likely the gas you are using. If you switch to a higher octane fuel it should solve the problem.
60mi/40mph = 1.5 hours