Ok, here is the background. I have a 2010 Flex EB with 170k on the clock. It has 84k on the long block (melted a piston under extended warranty), and less than 15k on the turbos. It was my wife's car for 5 years. I bought her a new Flex, and I took the old one as my toy. I have installed hot pipes and a Torrie tune about 2k miles ago. I have been going through it replacing bushings, tie rods, etc. I stumbled across the fluid change talks on here and realized my Flex has the original tyranny and PTU fluid. I am planning to put Amsoil in both.
My thoughts were, since it has so many miles on the original fluid, to use valvoline max LV, because it's less than $18/gal at Walmart to drain and fill several times, drive it for a few days and THEN drain and fill twice with Amsoil.
Does this seem like a good idea, or should I just drain and fill with the Amsoil? My thought is to use cheap stuff to clean it out, then switch to my long term more expensive fluid.
My thoughts were, since it has so many miles on the original fluid, to use valvoline max LV, because it's less than $18/gal at Walmart to drain and fill several times, drive it for a few days and THEN drain and fill twice with Amsoil.
Does this seem like a good idea, or should I just drain and fill with the Amsoil? My thought is to use cheap stuff to clean it out, then switch to my long term more expensive fluid.
