They Absolutely SUCK.....do you agree? I have a 2005 F-250, 6.0 diesel. It was running perfectly…read morefine, Zero Issues, it cranked up perfectly fine, i drive about 40 feet and it just shuts off, turns over fine but Zero fire or ignition. Speedily, Dart comes to recue with a Tow. They put the most elaborate diagnostic machine i have ever seen on it. The desk guy tells me, "We THINK its the High pressure oil valve." Oh no, i think, that's inside the engine. I should have said NO, i can't let you partially disassemble an engine on "we think" but i didn't cause i was leaving in 3 days for 4 months. Gave them permission, took about 9 hrs to disassemble and find out , Nope, that's not the problem. Asked permission to drain oil to check for contaminents, came back an hour later with, "Yes, you have metal in your oil, engine is shot, minimum of $35,000.00 for a new engine" I said, are you crazy, i ain't spending that. I got the guy directly behind them to tow to his shop, Twisted Wrench. A week later, he says, Yep, engine is shot. Finally got them to deliver my truck to my house, Twisted Wrench double charged me for the tow cause he was trying to steal at a cheep cheep price from me. I GOT a true diesel mechanic to fix it. ONCE he put back together the disassembled engine Dart left me with, he fixed it. He said, with those trucks, it's usually 4 things that go wrong 1) Low pressure oil valve 2) High pressure oil valve and i forget the other 2 things. All mine was, the $75 OEM low pressure valve and because my truck is lifted, that valve is right in front of your face. WHY THE HECK didn't Dart try a $75 part 1st....Stupid and Retarded if you ask me. By them missing the $75 part, they charged me almost $1,300.00 and left me with a partially disabled engiine that cost me lots to reassemble. I wouldn't recommend them to Anyone!!!! I asked the desk guy for a refund, he asked the owner, He replied NO! For Dart services I would recommend NO!!!!