Well my 3L build is coming to the end as of this July and hope to have it in by July 31. Now on with the oil! I have a 99 Cougar which was included in that TSB about changing to 5W-20 but since I bought the car almost two years ago I have been running 5W-30 Mobil 1 Fully Synthetic with either a K&N or Motorcraft filter.
Now with the 3L, I�m using the 3L short block (of course, 02 Sable) with also the 3L heads. I got the heads PnP and split ported by Kinger.
Now what oil weight should I run? And what weight are guy fellow 3L guys running? Thanks for all the help.
