Well, here's the latest..
I changed the oil (I wanted to start completely fresh (even though I have around 2500 miles on the last change but I dropped it anyway...
New filter and 12 1/2 quarts of 5-40 Rotella Synthetic T5 (what Iv'e been using since Shell introduced it). I started out with 15-40 Rotella but switched a few years back.
Changed the filter, drained the oil (hot of course), put in the drain plug, filled the filter and put that on, dumped in the 12.5 quarts and the jug of Archoil and started the truck and let it idle for about 15 minutes and shut it off.
Went out this evening after supper and fired it up. No startup smoke and it's running smoother and quieter already, didn't lope at all. Archoil says it takes about 100 miles of driving to really get the stuff worked through the engine but I can audibly hear a difference ans no start smoke. I'm amazed. If I pick up 1 mpg it pays for itself 5 rimes over on each 5K oil change. I'm using their fuel additive too
I'm not a believer in 'snake oil' additives but this stuff seems to work as advertised.
