Mobil 1 motor oil is made and shipped out of TexasHeadquartered in Irving, Texas, ExxonMobil is one of the largest publicly traded oil and gas companies not just in the United States but the world over. One of its key manufacturing hubs is located in its home state's very own Beaumont, where Mobil 1 is produced and packaged for North American markets. Also worth noting is that, beyond its Texas facility, the company also has global production centers in Singapore.As ExxonMobil's flagship motor oil, Mobil 1 offers an advanced synthetic formulation and reliable performance in extreme temperatures and high-stress driving conditions. It's used by professional race teams and high-end manufacturers, not to mention everyday drivers looking for dependable engine protection. Interestingly, it's also the official motor oil recommended for Porsches, Bentleys, and the full lineup of Chevy car brands. Chevrolet's parent, General Motors, is another huge American manufacturer in the automobile space. The two are a match made in car heaven.Phillips 66 makes motor oil in America and abroadPhillips 66 Lubricants, based in Houston, Texas, has a long-standing reputation in the American energy and automotive sectors. The company is a major producer of engine oils and lubricants with a corporate legacy that spans over a century. Alas, Phillips 66 keeps most of the details about its production facilities on an internal, need-to-know basis. Nevertheless, the company is known to operate multiple refineries and blending plants within the United States (including one in California).Phillips 66's most well-known product lines (like Kendall Motor Oil and Phillips 66 Shield) are used by professional mechanics, auto dealerships, and individual consumers across the country. You'll find them at Phillips 66, Conoco, 76, JET, and Coop fueling stations all over the U.S. The company's deep roots in American manufacturing, combined with its focus on innovation and performance, definitely make it a reliable choice for those who want domestically produced motor oil.