Possible bad gas?? now what?

As soon as I filled up (10 gal)my '97 2.4L, I've gotten progressively worsening hard detonation, loss of power, no stalling, but shaking. only driven about 10 miles. Can't go faster than 25 fearing something's gonna pop. Added red line complete fuel system-no help.Plan on emptying tank, adding new gas, changing spark plugs. Don't know if I got bad/dirty/cheap gas or water mix. Tanker wasn't delivering at the time. Any recommendations would be greatly appreciated-thanks

 

Sounds like bad gas to me dude. It happened to me once on a volvo, I drained it, but didn't change the plugs.