This is a weird one. My Explorer was initially my boss's car and was bought at the same time as another Explorer for one of our managers in November '10.
Mine has almost 23,000 miles on the clock, the other has 17,000 miles - both 2010s. Now, mine has always run on Euro II rated 91 RON (87 AKI), whilst the other one has always run on Euro II rated 95 RON (91 AKI). The insides of my tailpipe are as clean as a whistle, whilst the other one's got hard carbon build up inside the tailpipe. The surrounding of the tailpipe on the other vehicle is also caked in black carbon. There's also soft carbon in there as well - if you take a piece of tissue paper, you can wipe it right off, but the hard carbon remains stuck to the metal.
Sure, I've run CRC Fuel Injector Cleaner and Liqui Moly Fuel Injection Cleaner a few times, but I'm not sure just how much of a difference that would make.
Could the carbon build up be linked into the octane rating, using a higher octane than recommended, or the quality of the gas being used?
Mine has almost 23,000 miles on the clock, the other has 17,000 miles - both 2010s. Now, mine has always run on Euro II rated 91 RON (87 AKI), whilst the other one has always run on Euro II rated 95 RON (91 AKI). The insides of my tailpipe are as clean as a whistle, whilst the other one's got hard carbon build up inside the tailpipe. The surrounding of the tailpipe on the other vehicle is also caked in black carbon. There's also soft carbon in there as well - if you take a piece of tissue paper, you can wipe it right off, but the hard carbon remains stuck to the metal.
Sure, I've run CRC Fuel Injector Cleaner and Liqui Moly Fuel Injection Cleaner a few times, but I'm not sure just how much of a difference that would make.
Could the carbon build up be linked into the octane rating, using a higher octane than recommended, or the quality of the gas being used?