I would like to change my transmission fluid on my 04 Disco and was thinking about using Mobil 1 ATF Synthetic fluid. I bought my Disco used at 47k miles and I do not really know if the previous owner serviced the transmission. My question then, can I use the synthetic fluid in the transmission at 63k miles (the mileage now) or do you even recommend using this fluid at this mileage. I say this because I've read elsewhere that its is not recommended to use a fully synthetic fluid or in some cases swap out fluid and filter at high mileages. I appreciate any information anyone can provide.