Just got finished changing the oil in my 2004 Liberty.
Problem is:
Had been using Mobile 1 5/30 for the last 10000 miles.
When I changed this time I used the last quart of 5/30 then went to the new case of,Opps, 5/20.
Question is, will mixing the 2 weights (5/20=1 quart, 5/20=4 quarts)...