What is your question?
·
·
What is your question?
I OWN A 2004 CHEVY EXPRESS W/ APPROX. 130,000 MI. I BOUGHT IT WITH AN EXTENDED WARRANTY WHICH REQUIRES ME TO CHANGE THE OIL EVERY 4,000 MI. THE PROBLEM IS MY DEALERSHIP USED 10W-30 ON THE LAST TWO CHANGES. IS THIS GOING TO CAUSE PROBLEMS IN THE FUTURE?