Wife went out this morning and picked up Pennzoil Platinum 5w20 jug for me. I told her to get 5w30 but she said they only had the 5w20 and I guess she asked the guy at the counter and he said the Ford takes 5w20 anyways. Yes it does call for that but the thing is I have 3 QTS of Pennzoil Platinum 5w30 left over from the last change on my car. And since her expedition takes 7qts I figured why not. The car has 100,000 miles on it and we live in Maui so 5w30 is fine I'm sure. Should I return the 5w20 or just mix two QTS of 5w30 with the 5w20. Also fram ultra xg2 is the filter she got. Happy she got the rt filter