A friend of my girlfriend's family came in to town and i guess he works for amsoil... So he gets to tellin me that i should change to amsoil from mobil1 and told him i wasn't interested about the huge debate between the two, but he swore up and down that they're the best yadda, only company to provide tests of their synthetic, yadda. So anyways, he says they have a new nano-fiber oil filter out or coming out (can't remember) and with the filter and oil that there is no need for oil changes until every 25K, he said about 13K for hard driving. Anyone hear of this? I told him i could never feel comfortable going that long without a change, but would consider it for my regular changes if that is true. My girlfriend's father said he was gonna try goin 8K with it in his diesel F-250 and have the oil test afterwards, then if it comes back 90% he would do it every 15K or so...Just curious what others think about this or if anyone has tried and tested the filters.