Chel asked:


Do you get better gas mileage by filling the tank when you fuel up? or it is the same gas mileage when you only get a specific amount (ex. $20)?
You know I have to ask? Do you get better gas mileage with higher octane gas? Some cars recommend it, if you fuel up with a higher octane than recommended are you just wasting money?

Delores

ouyang asked:


We all know that manual transmission car usually can save gas than auto transmission cars. To borrow the idea from there, I am thinking about maybe auto transmission cars can save gas by switching to neutral if possible. Is that true? And any concern for the car if switching to N often?

Lance