Burning 3.9qts every 1000 miles

I'd love to know how many quarts of motor oil you buy per year? I bet you're far and away the greatest of all time in annual oil consumption for one vehicle after all these years.

 

PS: Please post your photo over at a new thread I just started: Please Post Your Favorite Odometer Photos Here | PriusChat

 

@Fatmatt86 I don't believe I've ever read a thread with a stranger subject and 12 pages of disbelievers of the Prius magic that you've had for over 100k miles.
Where has all thta oil gone?
gremlins need oil getting in there, keeping all the other systems in tip top shape.

 

My old 285k'ish 2005 gen 2 will burn about 1 quart of 5-40 every 600 miles or so if strictly used on the freeway at 75-80mph Definitely needs new rings/engine

My 2005 ~140k prius uses a very small amount of oil, maybe 1/2quart between changes. Hoping it won't become extreme with time. Oil changes done on time(5k) with full synthetic.

 

you clicked that photo driving 66 mph?
TomK

 

nice

 

I've been helping a person of modest means who was able to recently buy a 2007 Prius with 300K miles for $2K and told him about this thread you started almost 5 years ago.

So far he's burning way less than a quart per thousand miles. So when I sent him your latest post he replied:

"sounds like he's got a well disiplined practice of checking and adding!"

 

Gen2 engines are amazing... Here we are five years later and he's still driving it at 330K miles...

 

That car sure did exceed my expectations!!

 

Gen3s are pretty good at burning oil as well. Mine has 296,000 and the original cat. I guess it recirculates a bunch through the pcv and egr.

 

Also adds more information to how much engine oil is lost with combustion, versus how much is engine oil is lost in crankcase ventilation. I've been interested in this in terms of calculating carbon emission footprint of a vehicle with a bad engine. And due to lack of the cat having to be replaced after 5 years and 100K miles of this it seems pretty clear that crankcase ventilation oil loss is likely greater than combustion oil loss.

 

Take your intake manifold off and look at the coating of oil in there. Look into Atkinson cycle combustion. I have no EGR or crankcase ventilation system connected to my intake manifold anymore. But its impressive how much oil the inside of the intake manifold and intake ports will be coated with. The rings are just low tension and this lets oil around them into the combustion chamber and the car blows it back into the intake manifold for the next available cylinder to consume. Not bad. But it more or less shows how important great oil changes are for these cars. At the age of gen 2/3's now I say use high mileage oil to tighten up various engine seals and valve guide seals, use spec oil, and change it every 5k. This will help keep the rings clean and reduce oil consumption.

Its so easy to reverse it with a piston soak so its pretty apparent the rings on the 2004-2015 priuses are the majority cause of the oil consumption.

 

I bet his intake manifold is so full he could use his engine oil dipstick to check it...

 

Is your crankcase just vented to atmosphere through a filter or OCC system? Old school method?
Curious how well that works since a good PCV system will keep the crankcase at a slight vacuum and helps engine efficiency.

 

Yeah... I'd be real curious to know how fast this dude's engine could fill up an oil catch can... And the fact that his Cat has not gotten clogged and blown out the flange gasket is a real head scratcher.

 

If you are referring to my comment: yup it is open air catch can. 5/8" lines ran as short as possible to a big vented catch can. Wildly i get zero oil accumulation. In the winter i get a lot of water vapor because the can isn't insulated so its better at condensing. Just dump it around every 2500 miles. Efficiency wise without pcv vacuum and without egr i still get the same gas mileage, there is no change. Still get 52-55mpg around town, 46-50mpg going 70 down the interstate.

I more or less did the open air catch can to avoid the winter cold start knock that people have problems with here and there. I think the pcv system condenses too much water vapor in the winter which causes it. Now I have no cold start knocks, no oil consumption, no head gasket problems, no catalytic converter problems. Just from a piston soak, some high mileage 0w-20, no egr, and open air pcv. So $75 total over a weekend. lol