How I got 6 quarts out of....

What type of oil filter are you using? I have only heard of the ADBV being in the filter and the purpose is to trap dirt and prevent oil loss for cold starts. Your claim in the OP was that you are getting more out of the engine than you put in. Wouldn't a filter with a ADBV indicate MORE oil being trapped in the filter and not being accounted for as part of the draining? So in essence you would have even more oil coming out from an oil change?

But the filter used in the Prius is a paper style element filter without any disposable housing that contains an ADBV.

So could you share more about your method and materials.

 

cartridge filter, just like prius, but at the bottom of engine, not side. i assume there is an anti-drain valve inside the filter canister, but maybe not. not sure.

but i understand it normal for oil to drain from VVT after several hrs.

i posted about it on BITOG and some folks had similar observations in different cars: checking oil after driving vs cold engine | Automotive General Topics | Bob Is The Oil Guy

 

The Prius dipstick is hardly usable unless you wait about five minutes. But nobody here's seen the 50% difference reported by the OP. And he still won't mention whether he's using the dipstick properly, so what's the point in further discussion?

 

he didn't. read it again.

i agree, you should remove yourself from the discussion.

 

Now who's the unfriendly one?

j/k... you're awesome, dude. And friendly.

Something still seems fishy. Of course some oil will stay up in the valve train, but none of this is rocket science. If you really aren't sure, thoroughly drain your oil in a level system and then measure the replacement oil before you refill. Check the dipstick, wait five minutes, and check the dipstick again.

I agree that the dipstick tube of the Prius isn't very good; it curves and holds oil which gets all over the dipstick. The only way to get a good read is to pull it after it's been inserted at least five minutes.

And the claim that he drained out four quarts, added four quarts and subsequently removed six quarts still sounds pretty off, doesn't it?

 

this is certainly a clue. such abuse certainly caused overheated oil. maybe it created deposits in oil passages and abnormal amounts of oil is trapped in the engine head. if so, engine flush is the best way to proceed.

it least i don't insult and ridicule follow fellow PC members. and i don't speak when i have nothing constructive to say.

 

On a side note, I just cleaned/flushed and refilled by pickup truck's coolant system. The manual says I had a max of 2.1 gallons of capacity. I used over 2.5. Of course, I disconnected hoses and blew out the system with compressed air to get all the old flush and water out. My guess is that the manual assumes you do a standard "flush and fill" which typically leaves a quantity of fluid trapped in the engine block and hoses.

 

Capacity Cold and Hot are different in a cooling system. Your variance is 20%, not 50%

 

My brother in law had an old Ford LTD that would leak a lot of oil. Drive the car away and there was a puddle of oil left where the car was parked. He called it the Exxon Valdez.