I had oil/lub services at 3K, 7K & 11K. Tire rotation done at 7K, Service tech said 11K too soon, will do tire again next time. Spare is not used and stays in my garage, not a bad idea, but too much trouble for minimum gain. I tend to leave it to the professionals, if accountant says pay Uncle Sam, I pay; if lawyer says plead insanity, I will sing and dance; for Hummer service, I just drop it off and pick it up, the Hummer pros will take care the details. I am not smart enough to handle the tires.
