I did a little research before I used synthetic.

Royal Purple seems to be "the best". It's also the most expensive and you can't just go to Kragen or Target to get it. On the other hand, Mobil1 is a "good synthetic" and is cheaper than RP and can be found at Kragen, Target, and even Costco. Since most of us aren't professional racers, I'd go with the overall accessibility of Mobil1.

BTW, I had been using 5w-30 regular oil in my civic, changing regularly at 4-5k; and had effectively zero consumption. At 92k miles, I swiched to 10w30 Mobil1. I was concerned about leaks with the "more slippery synthetic". Now, my engine consumes about 1/2 qt every 4k miles. Runs nice and smooth though.