512BB oil capacity

14L roughly.

 

One point is that the amount needed for the first fill from new and/or rebuilt, or "dry-to-wet" (this is what usually appears in the documentation) will be more than what can be removed during an oil & filter(s) change, "wet-to-wet".

 

I use 13 quarts w/ new filters, "wet to wet".
Make sure to check the level in the dry sump hot when running.

 

NO NO ! ! !


as john b has written:
it is a dry sump, so only check oil level when engine is running

 

This doesn't always apply to dry sumps depending on how the oil stream is being returned back into the oil tank (as, in some designs, the returning oil can splash oil onto the dipstick, or cause waviness in the oil level top surface, giving a false reading). The Boxer OMs indicate that the oil level should be checked a few seconds after warm engine shutoff (and a few minutes wouldn't matter much as not that much oil will run down thru the engine clearances, but I wouldn't wait 30 minutes).

 

right steve

but I always check during engine runs and between min. and max I think it is about 2 ltr., even more and so it makes not much difference if there is 1 ltr left or not.
I only wanted to say that it is not ok to check after long time not running. because then the dipstick says nothing and when you fill up it may be ok, but when the engine runs the oil comes out of the reservoir - so happy cleaning then

 

Just so that new owners of 365 Boxers know that the engine has a wet sump and not a dry sump as the 512 Boxers have.

 

yes

 

NO NO ! ! !

Warm, shut off and check.

 

my NO NO ! ! ! has referred to the 30 min waiting until checking

 

You also said check while running.
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True, but the OM instructions for checking the engine oil level for a 365 Boxer are the same as a 512 Boxer due to the not-insignificant volume of the oil cooler and lines.

 

When I had my bbi apart last year and all the oil was out. When it was ready to restart the car, this is what I did: filled the filters before installing them, filled the tank to the full level which required between 12 -13 us quarts. Let it sit overnight. Cranked engine with coil wire off til oil pressure came up, then reconnected coil wire, fired and let run, set timing.

Took car out for a drive couple days later, shut down after good 40 mile run let sit a couple mins and checked oil level. It was unnecessary to add any.

Afterwards, I check after a long drive when it's fully warmed and everything is at operating temp and I only let it sit a couple mins. Never an issue, but I drive a bunch and I believe it helps with killing off condensation in the system. I don't use much oil at all.

 

right
and so I do always
but I only put the pipstick in, never turn it and take it out again
then I see at the lowest point how the level is