It evaporates so im going to add more when the oil level drops back to full or 1000 miles, oci legth depends on the condition of the oil, but im aiming for 4k
Fyi every oil I have ran in it stayed pretty clean on the stick. The engine has no sludge, just varnish so there is really nothing for it to dissolve that would discolor it. See my other thread on page 2 or 3 labeled 5.4 with varnish for reference pics.
So far I have ran PP, PU, synpower, napa syn, Formula shell syn, gtx hm, etc in this truck. The darkest drains were when MMO or Kreen was added to the oil.
It has a 7 quart sump btw, and its my opinion that the extra capacity helps the oil to look clean longer.
Last edited by electrolover; 02/20/13 07:22 PM.