Engine Cleanliness

[Silver]

Interesting. Honestly, I am not sure what to think of your experience. I have never used either of those brands for the duration of an engine's lifetime nor have I seen an engine that has only used either of those brands.

3/4 or more of the driving is stop and go traffic. Maybe that makes it worse. They've all gotten highway time driving to vacations, etc but generally spent a lot of time sort tripping and in traffic.