2003 Ford Explorer 4x4 4.6L V8 oil change?
I have a 2003 Ford Explorer 4x4 with the 4.6L V8 with about 137000 miles and it's due for an oil change and its the first since I have owned it but I do not know what the previous owner used. The manual tells me to use 5w20 but I have been told its probably better to use 10w40 because of the mileage but I don't know if this is true. Also full synthetic vs synthetic blend? Best brand?
TIA for responses!