Mobil1 FS 0W-40.
I believe that. My daily driver is my wife's old car, a '09 Pontiac Vibe. It calls for 0W-20, which I used when I got it for free. That source dried up when I retired, so I started using 5W-30 synthetic I have from an old stash . I swear that thicker oil slowed down that little POS. It went from peppy to doggy with that oil change. But free is free, right?
