Crossed over 20,000 miles since I bought this Raider, I had the oil tested on my 2nd oil change after I got it (cause I couldn't vouch for the age or type of oil the PO might have put in it before I bought it) and on my most recent one. Nice to see, even though it is leaking quite a bit, the engine is still in good shape internally.
If you have never had your oil tested, I highly recommend it.
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1989 Dodge Raider V6
2001 Jeep Wrangler 4.0L
2008 Toyota 4-Runner SR5 4wd