I'll give you a more informative answer.
Products that the United States imports from Mexico (2014)
According to the OEC, which is an MIT project (I wager collecting millions in government grants).....
We import roughly $290 Billion in products from Mexico.
The largest single portion of which, as you guessed.... is Crude oil, at $26 Billion. So while it is the single largest import... it's still only 9% of the products we get from Mexico.
The rest are various goods ranging from fully built cars (namely the VW Jetta, and some Honda models), to food products, medical supplies, and even precious metals.
The largest section of imports is equipment, which ranges from computers, to telephones, to refrigerators, air pumps and street lights.
The primary reason you generally don't see "made in Mexico" on much, is because the products we import from Mexico, tend to either be large expensive things, like Tractor Trailers, Delivery Vans, industrial electrical transformers, and industrial furnaces.... or they tend to be items that are used to make other products. For example, Mexico sold to us, almost $7 Billion dollars in seats. Seats in busses, seats in aircraft, seats put into your car. You could be putting your butt on a Mexican imported seat every time you drive.
Equally we tend to export to Mexico, tons of refined oil products, and many built goods, and additionally we sell tons of production equipment. For example, metal molds, chemical compounds, control systems, and so on.
What you will notice though, is that many of the exact same things are both imported and exported to, and from, the exact same countries.
All the same things listed that we import from Mexico, we also export to Mexico.
For example, VW has their assembly plant in Mexico, but the Engine plant is located in the US.
At the same time, Ford's diesel engine is built in Mexico, but assembled into a car, here in the US.
So when you see Mexico is importing car engines, and exporting car engines at the same time... it seems to defy logic. In reality, we export computers to Mexico, and import computers from Mexico. We export chemicals to Mexico, and import chemicals from Mexico.
Same with cars. We import cars from Mexico. We also export billions of dollars worth of cars to Mexico. Manufacturers who have cars they can't sell, can often export them to Mexico and recoup some of the loss. And of course millions of used cars are shipped south as well.
This is why, no matter what limitation on free-trade we put in place, it will hurt US, the most. Protectionism will always harm the country engaging in it, the most.
Nearly all of the jobs I've had, used imported goods to build their products. The job I'm at right now, does this. Most of those jobs would cease to exist, if protectionism was implemented, and free-trade was repealed.