Car Maintenance 07/02/2017

I changed the spark plugs in my 2008 Chevy HHR LS at about 182,724 miles on the odometer.  The last time that I was on Whipple's maintenance, I was concerned about the engine performance and thought that it was getting weak.  Turns out, it was just the iridium spark plugs.  It's a relief because I anticipate this month as being intensive.