PACCAR Manufacturing Engineer interview questions

Applied for positon on PACCAR's website. Got a phone call from HR about a week later. Asked to come in for 1 on 1 interview. Turned out to be a 3 person panel interview. Mostly technical related questions and why do you want to work here stuff. Was told I should here something the following week. After 10 days and numerous voicemails to HR I finally left a message with one of the interviewers. The next day I got an email from HR saying I was not picked. Followup question as to why I wasn't selected was not responded to. Also, despite having to burn a vacation day and drive 250 miles round trip, no reimbursement was offered for expenses. Interviewers were very nice and professional, HR was not.