Tacoma rattling on acceleration

My 2911 Tacoma with 30k miles, started knocking on acceleration while in 3rd or 4th gear

Rattling started after the dealership changed the oil

I'm not sure it's a gas thing because it didn't start until after I had the oil changed

I'm in south texans so it's hot so I added STP oil treatment to if that would help.... Nope...

 

30k? Have you changed the spark plugs?

 

Yeah, Steves104x4... 30k, I have not changed spark plugs.. I read that this is one the three possible causes of that rattling sound... I put in a tank of high octane to see that would help... Not much

 

There's a TSB out on the 2014 Tacoma with this problem. I'm not sure about the 2011. Bring it by the dealer. They fixed mine. They messed with the software.