no shop towels anywhere near your motor, no scotchbright
use a 0-x oil for good cold flow (even in Arizona) after break in
when cold" that's when most of your wear happens
when hot--oil not only lubricates it cools so flow is important
do not even think about 20-50 unless you are old school 2.5 to 3 or a race build
check your oil pressure
report
