I was suspecting that my Subaru Forester has a good bit of sludge due to its fuel rich nature, but after 1500 miles into the cleaning phase cutting open the filter revealed nothing out of the ordinary. (I know I am supposed to share pics.) This may not be a dirty engine after a steady diet of synthetics and 4K OCI for about 75% of its 78K mile life, but we will see what happens in the rinse phase.
We have a Mom's van also, a Toyota Sienna that we bought used with 60K miles on the odo. We had a dealer check up and 60K service right away with a clean bill of health. Then I did a short OCI at 62K when nothing interesting happened to filter or fluid. However, at that time I added 4oz of Auto-RX to the engine oil, just out of curiosity. At the 65K change I cut the filter open and found it full with a thick mud like substance, but at that time I did not have enough ARX left to start a clean phase. At the next OC it will get a full clean/rinse cycle started.
By the way, the filter can opener from Summit Racing is awsome despite of its sub $40 price. You just have to be patient with it and slowly adjust the blade depth about five times for a very clean cut.
We have a Mom's van also, a Toyota Sienna that we bought used with 60K miles on the odo. We had a dealer check up and 60K service right away with a clean bill of health. Then I did a short OCI at 62K when nothing interesting happened to filter or fluid. However, at that time I added 4oz of Auto-RX to the engine oil, just out of curiosity. At the 65K change I cut the filter open and found it full with a thick mud like substance, but at that time I did not have enough ARX left to start a clean phase. At the next OC it will get a full clean/rinse cycle started.
By the way, the filter can opener from Summit Racing is awsome despite of its sub $40 price. You just have to be patient with it and slowly adjust the blade depth about five times for a very clean cut.
