I just put Super Tech 10-30 full syn. in my 1998 Grand Cherokee, it will have 6000 miles put on it in the next two weeks as I am going on vacation in the Western States. Which sponcer here can do a oil test when I get back ? I went to the one posted (blackstone) and asked for a kit 2 weeks ago and have never received it. Need a kit and address soon, can anyone help ?