how long for oil to drip back into sump after flight?

[prkaye]

In your experience, how long does it take after a flight for the oil to collect back in the sump so that you can get an accurate dip?

 

[lr172]

In your experience, how long does it take after a flight for the oil to collect back in the sump so that you can get an accurate dip?

12-24 hours in my experience. DIfference is usually only 1/4 qt. or less

 

[prkaye]

DIfference is usually only 1/4 qt. or less

Do you mean the difference between a dip at 12 hours and a dip at 24 hours, or do you mean the difference between a dip shortly after the flight and another dip 12-24 hours later?

 

[rv6n6r]

I see 0.2 - 0.3 more if I measure it a week after versus a day after a flight. Beyond that the difference is negligible.

 

[prkaye]

I guess what i'm most interested in is roughly how long immediately after a flight before the sump level is back up to say 90% (or say 1/4 qt) of stable level? 1 hour? 2 hour? 6 hours? 12?

 

[AlexPeterson]

I guess what i'm most interested in is roughly how long immediately after a flight before the sump level is back up to say 90% (or say 1/4 qt) of stable level? 1 hour? 2 hour? 6 hours? 12?

I think within minutes. However, one problem is the oil in the dipstick tube smearing/interfering with getting the stick out untouched. The other, larger problem is that the hot oil does not leave a nice sharp line like cold oil.

 

[Robin8er]

A few minutes after shut down you will have an accurate oil level, you may need to clean the dip stick to read it accurately.

 

[Mikeyb]

My experience. Newer IO360 M1B. Constant speed prop. Tail dragger
Oil level after shutdown hot 5.8 Q
After 5 hours warm 5.8Q
After 24 hours cold 6.0Q
Very repeatable

Very Similar to Larry’s Estimate

 

[prkaye]

Thanks Guys. I did an experiment the last 24 hours and my results are similar.