I know this topic is always going on every forum but couldnt find one on here. So i know the 5.7L wants it meals served with 5W-20. So i went to my local walmart and was overwhelmed with oil. I have been putting in Mobile 1 full synthetic for years now and will only use that. But to my surprise Mobile 1 makes 3 types of 5W-20 now. There is just the normal silver one, a blue high mileage one, and a gold extended performance one. Im doing the oil next week and wondering if anyone knows the difference or used the other two? Also Fram has a Ultra synthetic oil filter. Any good?