Go to 32-1 syn and say there -
there will be exhaust residue - accept it -wipe it down with a little fuel on a rag .
On the piped 26's they always spit residue as do all my gassers (I run 32-1 in all of em) .
On the 26-- it has smallish rod bearings -in that it is a compact case - these are what fit the job
The bearings can not afford to be run dry as larger ones can tolerate .
The factory says 32-1 fuel - stay with it .
( 4 ounces of Mobil 1 to 128 ozs of 91-93 oct.)