ok may be its psychological that i thought one oil made my car run smoother than the other one.....but i've heard multiple times that royal purple is shitty.
also, i definitely feel my car run smoother after getting an oil change! that i believe a 100% and i know its not just in my head.
and the part of me selling cars and how i should know this.....i never said i was a mechanic or an engineer when i commented. you don't HAVE no know a lot of cars to sell them. its more your personality and if your client trusts you. half the car sales people don't know shit about cars! lol. im def not one of them though. i know quite a bit but again...im no mechanic
