Back when I was doing several oil changes a day as a high school age gas pump jockey, the rule of thumb for stovebolt engines was "4 quarts without a filter, 5 quarts with". That was 60 years ago- - - - -some things never change!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!