I have been using Mobil 1 in all my cars since Mobil first put it on the market. Here is why:
I was a fighter pilot in the Navy during Vietnam. My last duty was as a functional test pilot at the Naval Air Rework Facility in Pensacola, Florida. On one test flight, in an A-4 Skyhawk, I was at 40,000 feet about 125 miles south of the main field at Pensacola Naval Air Station. A hose (pipe) broke and I lost all my engine oil in about 15 seconds. The procedure was to set 92% RPM, about 27,000 RPM, and minimize stress on the engine until short final, and then s l o w l y reduce power to idle when the runway was made. I declared my emergency and returned to Sherman Field. It took 25 minutes to get back and, when the runway was made, I slowly reduced power to idle. The engine seized, stopping from 27,000 RPM to dead stop is about 2 seconds. It torqued the airframe about 45 degrees, from which I recovered and rolled out without an engine. When I asked the Pratt Whitney rep how I had been able to fly for 25 minutes with no oil he explained that the Navy jet aircraft used synthetic oil made by Mobil Oil. At that time it was not available for cars, but once it was I immediately changed my cars to Mobil 1.
I had bought a Honda Accord when they were first brought to the US. After 11 months and 12,000 miles there was a recall because Honda had found that head bolts had not been tempered properly. As my wife and I waited in the waiting area a mechanic came out holding something in a large shop rag. He asked if the Accord was ours. He then showed us what was in the rag. It was our Cam Shaft. He wanted to know if we had changed the Cam, because when he cleaned it up it had absolutely no wear marks and could have been put back on the rack and sold as new. He wanted to know how this was possible. I explained my history with Mobil synthetic oils. I told him I had changed to Mobil 1 when the break-in was done at 500 miles. I changed again at 1,000 miles to get rid of the rest of the regular oil that was in the system. (I changed the oil filter at the same time, also.) He changed his own car over to Mobil 1.
Besides that, the price I paid at Walmart was less than half what everyone else was charging, including online.
The bottom line: The best oil at an impressive price. It doesn't get any better than that.