Here are tips for making your car last longer from the National Institute for Automotive Service Excellence.
A courteous staff that's willing to answer your questions is a good starting point, as is a shop that's displaying the ASE sign or logo, which indicates the shop employs certified technicians.
It's also a good idea to check what vehicles the mechanics are working on. If the vehicles in the parking lot are equal in value to your own, that's a good sign.
Give your engine a break. Cars aren't all that different from the human body in that everything is directly or indirectly connected as a system.
A clogged air filter or fouled spark plug make combustion less efficient, which reduces power - and wastes fuel. Motorists can give their engine a break by replacing clogged filters, sticking to their vehicle maintenance schedule and routinely checking fluid levels.