In the past when I bought a car or truck with unknown history I bought cheap oil and filter ran it short time as a,flush.
Then put good stuff in. By cheap store brand or what ever was on sale. Then what I planed on using
This is a pretty decent idea right here. I'm right there with you as far as the maintenance/upkeep on vehicles between new and used. I used seafoam in my daughters car (30 year old Toy with 75k on it when bought) the upkeep on that vehicle was very questionable. She drove around with 2 cans of that in the first oil change I did, put about 800 miles, drained, it was horrible. Rinse and repeat. The treatment worked well.
As far as dropping the pan goes, if its anything like the srt4 I had, its a piece of cake.
