I know this is prolly a retarded question but here goes....

Is it bad to go from full sythetic to regular back to full sythetic oil??
Because i put some regular oil accidentally (thought it was sythetic) bc i was running low, and decided to change it back to full sythetic again. I thinks its bad bc its not idling right and when it revs it sounds like a freakin harley.. But idk let me know what yall think.

 

No and it wouldn't cause the issue you're having now

 

Sounds like an ignition problem (bad coil, incorrect spark plug wiring order, ect)

 

Ignition? Alright ill look in to it. But i said that i thought it was the oil because it was running smooth b4 changing the oil. The only weird thing that was going on b4 changing back to full sythetic was that my rev limiter went off at 4500 while driving and after a couple minutes the check engine light turned on and ran fine.

 

You've got some serious underlying issues. Sounds like it's time to see a mechanic.

 

Yeah i figured, thing is that i want to know b4 going. Not looking to get ripped off..

 

Get a $20 USB/obd2 cable and some free software and start by pulling the codes and looking at the data.

 

Oh cool alright ill get one.