oil capacity 6.4 (dealer puts in 15 litres)
this seems to be a contentious issue. long story short i picked up some rotella t6 when i was in michigan a couple of months ago at walmart along with a motorcraft filter. t6 is roughly about 35% cheaper state side, so the plan was to change my own oil. i got busy and didn`t get a chance so i had my local dealer do it for under 30 bucks.
I explained to the young lad that the oil capacity on the 6.4 is 15 quarts or 14.2 litres, and not to dump in the entire 4 gallon containers in. I had an extra quart with me just in case they screwed up.
i got in my truck expecting a little left in the gallon jug and there was nothing but my extra quart. I told the young lad that they have possibly overfilled my truck so i brought it back in and spoke with the oil change child and he said he dumped in the 4 jugs which is 15.14 litres. I explained about the regen process of this engine and that it "makes oil". He just starred at me with a blank look on his face. i asked him what amount they normally put in for the 6.4`s and he said 15 litres, thats what the machine measures out.
nonetheless, i made him drain some out (he said approx 3/4 litre) and checked the dipstick. one side read half on the hatched marks and the other was close to the full. (inserting the stick fully in)
when i arrived home the 6.4 owners supplement states 15 quarts 14.2 litres with a number 2 beside it that states includes 1 quart in oil filter.
now my question is it better to keep it between min and max rather than close to full?, and which indication on the dip stick is correct?