Can I go to a Mechanical Engineering graduate program with a BS in Neuroscience?

@Bma009 - Welcome to the Forum. I agree with the opinions expressed above but there is another issue that you need to consider. That is, if you really have determined that engineering is your best path, then why stay in a major you are not happy with? You are a Sophomore so you can look into possibly transferring to an engineering program elsewhere. It may not be financially optimal but if you have to take extra courses to prepare for a graduate degree in engineering, that will have some financial ramifications as well. In any case, you need to take as much Calculus and basig physical sciences as possible with your electives if you choose to stay in your current major.