Strange engine oil level readings

[Kim Geyer]

That should be the correct dipstick
What I do is after an engine change at the first oil change I’ll put in 8 quarts and scribe a mark On the dip stick. It is always 1/4 inch below the 8 mark on the stick. The pilots run the engines at the scribed mark and the engines don’t seem to blow any out. Then at oil changes I’ll put in 9 quarts and after the run up the level will be at my scribe mark. 1 qt. goes in the filter. It’s the same on all 5 of our 337’s