yeah, then it's pretty darn clean. What oil have YOU been using! LOL!
I just used water
no, seriously, the oil (all brands I've used) has always been so clean on my dipstick, i have to hold it at an angle to check it.
I got the car w/72k, and the prev. owner used ONLY Pennz. dino 10/40, he said.
since then I've used:
Pennz. HM, several OCI's
one OCI with GC,
several OCI with Chevron dino and
one OCI w/Arx & chevron(at 80k miles or so),
M1-SUV 5/40 once
..so this Tbird 4.6L has seen a bunch of different oils, but only MC FL-820s filters.
then for the last 15-20k or so, I've only used MC 10/30+10/40 mix with a little RL 10/40 as top-up (last OCI: 6 months), and VSOT (half a bottle, only in the last OCI).
Currently, I'm using Mobil HM 10/30 for winter. in summer it'll be Hav.HM 10/30.
The car sees extreme short-trip abuse (at least four 3-5 min drives a day, and the longest trips about 15 min, 3-4 times a week), so I guess I should be happy that it's clean, huh?
Brian: This is a '97 4.6L