Is this sentence correct?

Which sentence are you speaking of, Ewan?

Actually, I'm referring to all the sentences.

I wanted to use this as my signature "I life my life a quarter mile a time" .. now is this grmatically correct or is it supposed to be "I life my life a quarter mile at a time".... or are both of them wrong ??

I'd repunctuate a bit, Ewan:

Waiting is always tough. We have this proverb which says, "Waiting is torture", but we also have another that says, "Patience pays".



And welcome to English Forums, Bondin. Both are wrong, but partly because of a typo, I think. This is correct:

"I live my life a quarter (of a) mile at a time."

thx mister micawber...
yeah a typo there.. ;-)

but am trying to understand what's wrong with the sentence "I live my life a quarter mile a time"

What's wrong is that the phrase is at a time. The preposition at is required:

Please choose your partners one at a time.
At a time like this, we must all keep our heads.

For one, you quoted the movie wrong. The correct quote is, "I live my life a quarter mile at a time, nothing else matters, for those ten seconds or less, I'm free." So to be grammatically correct it should say, "I live my life one quarter-mile at a time."