[david85]

Never tried the acetone trick since that would reduce lubricity of the fuel (truckers used to use gasoline as an antigel back in the day, but thats not a good idea with today's fuel either). I run stanadyne supplement in my truck and tried automatic transmission fluid on occasion with good results. The ATF cured a stall on decel condition twice before eventually having the pump rebuilt (and upgraded).

You can run an additive like diesel kleen, stanadyne, howes, etc. if you want, but based on your results, you have a mint engine and fuel system in there since you are basically getting the exact results that car should be getting. Just take good care of it. A supplement won't hurt and offers a little extra protection from fuel contamination. Ford diesel trucks came from factory with a water separator in 1986, but I'm not sure if ford did that for their cars. If it doesn't have one, you might consider adding it.

At this point, I wouldn't even bother doing anything with the pump seal unless it starts leaking again.

If you want to be ambitious, you can try advancing the timing slightly, since ultra low sulfur diesel doesn't explode the same way as the old 'unskimmed' stuff they used back in 1986. Just scribe mark the current location of the pump if you decide to tamper with anything and go very slow with any adjustments because those are some great numbers by any stretch!