Hey guys, I just recently moved and had to use a quick oil change joint to get my truck serviced. I specifically told them not to use synthetic oil in my 235,000 mile 6.5 Suburban, and I didn't want them using the Chineseum generic filter so I provided a WIX filter for it and trusted them to use the right oil. I didn't look at the recept right away and it turned out they used a synthetic blend 15/40. Is this going to be a problem?