Not to assume anything about you, but from your brief question, I get the impression that you are like any other ill-informed BS student who thinks continuing grad education is always the right next step.

It really sounds like you don't know why you want to go to grad school. If you did, you wouldn't be asking this question. Those who are most likely to succeed in grad school have a clear idea of what they want from the experience and have specific professors and schools in mind. If you have plans to become a professor (and again, I would ask you why you would want to be a professor and if you are willing to put up with the current requirements to reach that goal), then ou might have to go to grad school regardless. But if you are career oriented, especially as an engineer, there is very little reason to pursue a PhD. You make solid income as a BS engineer and many positions of authority down the road do not require a PhD for engineers. If you want to switch fields (like move to EECS or ME), then a masters might be worth looking at.

This might sound harsh to you, but I was just as clueless when applying to grad school when I was 21 and I suffered because of it. I thought it would be cool to get a PhD doing original research and avoiding getting a job so I applied to a bunch of top ten schools without really paying too much attention to the type of research I wanted to do.

Please take 1-2 years off and figure out what you really want before diving blindly into grad school.