OK can you tell me if I am running the right oil,2007 Gt 500 built engine, broke engine in with 2 regular oil changes, The car doesnt get driven in cold weather, it does have a 170 stat, pedal is to the floor most of the time, maybe 500 miles a year,right now I am running 10/30 signature oil with ford racing oil filter, car makes high 900 rwhp ,Should I stick with signature? I drop the oil every 6 months because it gets run hard, thanks