RPM = Rotations Per Minutes. the higher the rotation speed, the faster your computer can read/find your files.
Anywhere from 35-65 psi. Higher psi at higher RPM's. Lower at lower RPM's.
RPM is short for Revolutions Per Minute. It is the measurement of how many times your engine is rotating each minute. As you accelerate, your RPM will increase until the next gear is selected, lowering the RPM. RPM is the whole reason for transmissions: if there was only one gear the RPM would get so high that the engine would become damaged. By shifting into higher gears, the RPM is lower and you get better gas mileage.
THE LOWER THE NUMBER THE LOWER THE RPM'S. THUS BETTER MILLAGE. SO THE 2.56 WILL GIVE U LOWER RPM'S. THUS BETTER GAS MILAGE.
depends on what car and what engine, typically if your cruising on a freeway, you will be running at half RPM or at the most 3/4, but the lower RPM the better with that you get better gas mileage.
The higher the speed the lower the miles per gallon will be. Higher speeds mean that the engine rpm's are also higher ... higher rpm's means greater gasoline consumption. Try going 10 miles and hour less and run a test on your mileage ... you might be surprised at the results.
650-700 rpm.. If any lower it tends to shake and vibrate to much.. and anything higher is unnecessary.
Driving on lower RPM's will reward you with higher gas mileage in addition to putting less wear on the engine. So, low RPM will be cheaper in the long run.
Yes.
It depends on what the car is being used for. The 310 at 1750 would be better for stop / start traffic, and most "real world" situations. 342 at 6200 would hardly be used unless you were driving a race car. (Or enjoy revving out your engine every gear change).
An overdrive transmission adds an additional gear ratio to the vehicle. This additional gear allows the engine RPM's to be lower, resulting in better fuel economy at higher speeds.
You may have a vacuum leak.
Improve your driving technique.That obviously includes many things, but chief among them:Learn, and make use of, the "progressive shifting" technique. (Basically, shift up at the lowest RPM possible, and make your downshift at the lowest RPM possible, to lower your average overall RPM's. Lower RPM's, almost without exception, mean lower fuel consumption.)Use the cruise control as much as safely possible.Stay out of the turbo as much as possible. (accelerate more slowly)Keep your highway speeds and RPM's down. (If you can keep your cruising RPM's below 15-1600 and your speed below 60 MPH/100KPH, or even better, below 55 MPH/90KPH, the benefits, particularly improved fuel mileage, are astounding.