I have also been reading that Mobil 1 high mileage has some very good cleaning properties in it.Could be an idea. I have a “low-SAPS” HDEO in it now(Rotella T6 MV 5W-30, Detroit Diesel 93K222/218 and Mercedes 228.51 approved) so the benefits might be moot.
To clean varnish, sludge and ring packs.
I am trying it on a 2015 odyssey that seems quite gummed up from dealer changes and honda VCM system, which is awful btw.
Canada - - the HP cleaning stuff is way to costly to get it shipped here.
Otherwise I would be all over it.