Toyhead

I am changing differentials , transfer , and transmission fluids in my 4 Runner
to Mobil 1 full synthetics and was wondering if I need to flush out all old conventional oils out prior to adding the new synthetics ? Don't know if both are compatible or what ? Any help would be greatly appreciated > THANKS


" 93 4Runner 3.0 5spd. OME coils and shocks Downey torsions
" 95 EXT Cab 3.0 5spd. Rancho shocks and springs Downey torsions

MTL_4runner

The common misconception with synthetics is just that, that they are completely man made.
Most sysnthetics can be easily mixed with non-synthetic because they are simply made via a futher refining process(es).
It is the extra refining (and marketing) that gives synthetic its exorbitant pricetag.

http://www.cartalk.com/content/colum...anuary/06.html