Currently Peak 0w20 Synthetic. Have used Toyota 0w20, Mobil 1, Mobil Super, etc.
Mobil 1 was on sale for $5 / qt. on Black Friday.
Peak was like $20/ 5ts with filter.
Pep Boys house brand is also $5.50 / qt. regular price (I asked the clerk who makes their oil, but I forget...It was a brand name though.
I really don't think anyone can buy "bad" oil which would harm their engines anymore. It comes down to personal choice and what you want to spend your money on.
Silver 2001 Insight 5spd - #0160
(Has some bruises, needs some stuff...but I still love it.)
Citrus w/ A/C - #2083
(Still needs some stuff...but I already love it.)