I am a big fan of the Delo 400 15/40,I use it in my dirtbikes,streetbike and my 88 chevy van. I just purchased a 01 XTERRA V6 with 50,000 miles. I would love to use it in this vehicle also,but it calls for a 10/30.I am just worried about using it in the winter,located in South Jersey, average...