Originally Posted By: aquariuscsm
Originally Posted By: alarmguy
First, thanks for this UOA, for fun, I was thinking of trying it in my Road King.
With that said, what am I missing here?
Am I seeing something no one else is?
or
am I crazy?
IN the report Blackstone states Viscosity Should be 14 to 18 for a 20w50.
Isnt the viscosity supposed to be 16 to 21 for a 20/50?
Something is not right? Isnt this UOA showing the Castrol 20w50 having a viscosity of a 10w40????
If I am right, I suspect that maybe Blackstone reported on the wrong oil. Im convinced of it and believe it or not wish it wasnt true. Almost looks like someone else VOA on a 10w40
These cars just beat the holy heck out of the oil. My very first uoa was Royal Purple Synerlec rated 20W50. 3200 miles and it was down to 15.92 cst and it starts out at 20 I think.
It's not beating the oil as much as your fuel dilution is in the 5% range. Royal Purple in my testing does very poorly with fuels dilution. If left uncontrolled, that FD will start eating engine internals.