well i put some very expensive oil in my car, regularly 7.95 a quart, i dont get it for that expensive. i get it for 6.25 a qt.i rushed the oil change cause i needed to go somewhere and notice my oil is about a full qt higher. i was like wtf???? happened here??? well i drove it for a couple days and its still high i cant understand what happened??. today while i was checking for leaks and everything i remember i forgot to take off the oil in the front sump :slap: i take off the bolt and let some oil drain. im perfect now, im just so pissed i mixed some perfect good oil with some old one. the old oil was motorcraft 10w 30 and was only 1500 miles old. the new one is full synthetic 10w 40 .my question is will it be cool??? the old oil wasnt old at all. it should mostly be synthetic anyways since the front sump only has about a qt anyways right???