We've got both a 2005 and 2009 Corolla and the diminished quality is quite evident between the two. Things I didn't notice or pay attention too when we bought the '09. The paint quality is horrible on the '09. Very thin and scratches so easily. We have had zero problems with the '05 - never been...
Long time lurker and first time poster -- please be gentle !
Used Mobil 1 for years. Been doing Blackstone testing on my 2005 Corolla now with 80,000 miles. I changed the filter only at 6000 miles. Blackstones comments were as follows:
"You tried a 12,572-mile oil run and your Toyota's engine...