Hello I'm currently running a 2003 Honda Accord EX V6 with 138,666 miles on it. I just had my transmission fluid done today and ended up doing the oil at home as well. I stuck with Motorcraft 5w-20 which will be the second time I used it. $17.?? at Walmart for the 5 qt jug. Previously I used a Mobil 1 High Mileage Synthetic because it was about to be winter and I heard it starts better so whatever. Before that I just stuck with a lot of random oils and then Honda 5w-20 syn blend. Last time I went with Honda's 7,500 interval, but the severe interval is 3,750. The Severe Conditions listed by Honda are driving less than 5 miles per trip, driving in over 90 degree weather, extensive idling or long periods of stop and go driving. So with my car approaching 150,000 miles should I stick with the 7,500 interval or switch it up to about 5,000 or so? thanks