Turbo Engine Oil Quantity

[tps8903]

Hello,

With the addition of a deep sump and spin on filter the Aerovee Turbo should take more than 2.75qt of oil.


How much oil are turbo users using? I currently have 3.5qt in mine and it's showing at the low oil line that existed pre turbo which was 2 qts.

[GraemeSmith]

I don't have a turbo - but I do have an additional oil filtration system on an AeroVee.

To determine the additional volume of the system - I first calibrated the dipstick.
Then I added the filtration system and topped off the oil till it showed on the original marks.
I then knew the new volume of the system. Original plus top off.

My reasoning was that the engine pickup tube and pump expected to "see" the oil to be at the "normal" level - regardless of the system volume.

Accepting that the argument will breakdown if you are asking the system to pump through too fine a filter, causing back pressure and potentially trying to "lift" a greater weight of oil than it was designed to do - I reckoned it was close enough to work.

My "nominally" 2¾ quart system actually has a 3½ quarts of oil in it.

The larger volume is the one to report on the oil sample when sending out for analysis.

[tps8903]

I don't have a turbo - but I do have an additional oil filtration system on an AeroVee.

To determine the additional volume of the system - I first calibrated the dipstick.
Then I added the filtration system and topped off the oil till it showed on the original marks.
I then knew the new volume of the system. Original plus top off.

My reasoning was that the engine pickup tube and pump expected to "see" the oil to be at the "normal" level - regardless of the system volume.

Accepting that the argument will breakdown if you are asking the system to pump through too fine a filter, causing back pressure and potentially trying to "lift" a greater weight of oil than it was designed to do - I reckoned it was close enough to work.

My "nominally" 2¾ quart system actually has a 3½ quarts of oil in it.

The larger volume is the one to report on the oil sample when sending out for analysis.

Thanks for the reply.

[Bryan Cotton]

I
My reasoning was that the engine pickup tube and pump expected to "see" the oil to be at the "normal" level - regardless of the system volume.

I think if the first builder had calibrated the dipstick, he would be all set. If not, he needs to know the numbers.

[tps8903]

Answered my own question this week at my 5hr oil change. I had 0.5 qts of blow by in my oil separator, and the engine was still showing full on the stick. So we'll call it 3.5 qts with the spin on oil filter, top mount cooler and deep sump.