If it’s fresh clean oil then it doesn’t really make much of a difference which side you pour oil into but whatever makes you feel more comfortable. General opinion is that it isn’t necessary but prefilling doesn’t hurt and most mechanics I know do it as a just in case anyway.
If it’s fresh clean oil then it doesn’t really make much of a difference which side you pour oil into but whatever makes you feel more comfortable. General opinion is that it isn’t necessary but prefilling doesn’t hurt and most mechanics I know do it as a just in case anyway.