Be carful with 10 quarts. Every single engine i had the dipstick was wrong by over a quart. the only way to know for sure is drop the pan, fill with water until below windage tray then reinstall and fill with
oil and mark dipstick. that being said the
oil pump pickup is 1/2" off the bottom of the pan so you have some room to play. If you have a high volume
oil pump than you better have enough oil but not to much that it foams. I know you would think it would be simple but it never is.
Lets say you had wash down, which i doubt, it would still take 50K plus miles to know a difference. Sheet two stroke engines use gasoline as a lubricant mixed with 50:1 oil, lol. There is always somebody to take your money.