oil consumption vs length of oil change interval

Jacek, where do you think the oil is being lost? At a gasket or in through the rings? It has to go somewhere.
Blackened spark plugs: Valve cover gasket
Thick, oily EGR pipe deposits: Bad rings
Dark stains beneath engine: Seepage or leaking oil pan gasket (I assume Prius has one)
Or it could be the cylinder head gasket, or the timing chain gasket.

 

Do you intend to tear down and replace the rings? Or maybe just do a compression test?

 

I've read from many users that thickening the oil often stops oil loss. 5w40 is still well within the specs of the Prius engine; it just increases fuel consumption slightly.

I bought five 5-liter containers of 0w20 and I still have about three changes left with that, then I'll switch to a thicker formulation.

 

I think you meant 0w-20? That's what I remember you using when we changed oil last month anyway

 

Oops. I fixed my post.

 

I voted, didn't matter because I live in a back assward red state. I entered the poll also, 10K OCI and 174k miles presently. I use Mobil1 0W20 and Toyota filters. My oil consumption started just before 150K. I used the EPR package at the end of 150K oil change. At 170K, i used Mobil 1 0W20 and new filter. After 3500 miles, I was almost a quart low, half way down between the oil level marks. Voters with less than 100K in this poll usually don't use oil whether 5K or 10K OCI. I would like to see a poll of only those over 100K and see if there's a difference in when the oil use started between the 5 an 10K changes. I think the reason for oil usage is carboned oil rings and I believe the way people drive contribute to the carbon also. At the 180K oil change, I will use the EPR again and see if there is any changes.
I've already had one low beam headlight go out, I just hate to keep throwing money at this thing. /s

 

Where'd you get the oil for $1 and how much have you socked away?

 

I will stay with the 10K OCI and 0W20 and see if the EPR and MOA make a difference. I was setting at the beauty parlor waiting on the wife, had the heat on and noticed when the engine was running, it would miss every once in a while. I will put an EGR , EGR cooler and intake cleaning on the to do list.

 

Even in the Toyota suite of products too. The corollas and scions have noted oil consumption. Monitoring is key.

 

Every gas fill up or 10,000 miles, whichever comes first.

 

Wait what???

 

You PIP owners.

 

Yeah my comment was intended somewhat tongue in cheek; I appreciate it's somewhat labour intensive, to put it politely, lol.

A couple of things I do (and this is every 6 months: is take the panel completely off, and rinse out all the plastic fasteners with hot soapy water.

I've done maybe 12 oil changes so far, believe I've replaced two fasteners, that had lost a tooth.

 

Voted. Looks like I'm with the majority.

 

Excessive consumption began around 110,000-120,000 miles.