Oil Consumption 2010 Prius

Yes that was me. Wouldn't this method be basically removing the PCV vavle? The engine does need that pressure release.

 

Are you addressing me? Do you mean putting in an Oil Catch Can? It's in series, between PCV valve and intake manifold, and as long as it's non-vented style, and good, air-tight construction, it's not changing the PCV function, just trying to waylay the air borne oil particles, trap them before they get into the intake manifold. I believe that's the oil you're seeing, pooling below the throttle body throat?

I guess I should give it a try, lol. I'm still waiting on @NutzAboutBolts to be the guinea pig, put out a video on his experience. Then there's the cost, Amazon Canada is asking $65 for the one he's using (it's $50 in US), and you need a few peripheral pieces too, a splice or two for tapping into the hoses, clamps, extra hose.

 

I just did my 180,000 mile oil change, topped up the oil 4260 miles back and it was 1qt low when I changed. I did the EPR and MOA treatment again, but I don't know how many more miles I will put on, putting it up for sale this week. NADA lists clean retail at $8120 with this mileage, I'm asking $7200 with a little wiggle room.
I am pleased with the results of the first round of EPR and MOA at 160,000 and I expect it will improve some more with this treatment.

 

My assumption is that Gen 2 and Gen3 are practically the same engine except for EGR. Another assumption (based on anecdotal evidence) is that most of the oil consumption starts with oily carbon buildup sticking the rings. I removed the oily component of the equation by installing a PCV catch can.

There are hundreds of reports across the 'net for years about unsticking rings with piston soaks and drastically improving the oil consumption. My experience originates from the '95 Saturn I owned in college - notorious for burning and leaking oil.

Unfortunately I don't have the time or the tools to do a teardown and rebuild to see the combustion chamber before/after various changes. So I'm left with observations of the oil level and using educated guesses.

 

I believe that this would be true and the ERG would clog again except that by not letting oil back into the throttle body then the stick carbon would not be in the exhaust to collect in the ERG. I believe that the burnt oil and gas carbon is what is clogging the ERG as well. This step removes the oil and the ERG should function flawlessly. At least I hope it does.

 

How did you plug the hose from the throttle body? I'm going to do this on my Prius v.

 

A bolt and clamp.
Please post here or message me to let me know if this works for you as well.
Thanks!

 

I will! Any theory why this happens over time, or only to some and not others?

 

I'm not understanding; can you clarify? There's a hose between the PCV valve and the intake manifold, sort-of U-shaped, 3/8" ID at PCV valve end, and flares out at the intake manifold end. This is the hose you got a new one? And then?

 

Yes, the hose that is attached to the PCV and throttle body. Remove the old hose from the throttle body and leave it alone. On the new hose plug the end to should be on the PCV and attach it to the throttle body. That's it.

If you ever have to have emissions done (not required in Alabama) you should be able to remove the plugged hose and reattach the old hose before testing.

I'm not a mechanic, so if this is doing damage that I am unaware of please let me know. I am at the 5000 mile mark for the third time and have no oil loss and the oil is a golden dark brown on the stick.

In my original post I mentioned that I noticed the oil consumption at 145,000 miles. I made this adjustment at 205,000 miles I am currently at 220,000 and have burned no oil over the last 15,000 miles. Nothing about my driving has changed so I can only attribute this to the "adjustment".

If you do this please post here.

Thanks!

 

Thank you for posting more information. If this modifaction wasn't throwing a code would the emission testing place to be able to detect it?

 

I think this fix is essentially letting the PCV valve vent crankcase gasses directly to the outside atmosphere rather than recirculating those gases so that the unburned hydrocarbons are consumed. That is why this modification will fail an emissions test IF the setup is detected at the testing station. Personally, I would try the sealed oil catch can approach recommended by danatu in a different thread, or relocating the PCV valve higher on the block like the valve cover.

 

Ok, understand. Yeah this is not my cup of tea: circumventing the pollution control, dumping crankcase gases into the air.

 

It's burning the oil, not leaking it. It's pretty common, the 2AZ in the Camry and Rav4 have enhanced warranty for this.

It's caused by the oil scraper rings becoming clogged with soft carbon. The main cause of the soft carbon build up is short tripping. Like if your daily commute is not long enough to get the engine up to full operating temp and keep it there for a few miles. Also continual low rpm driving may contribute, you need to WOT occasionally to help keep the rings clean.

 

great argument for a phev.

why do people buy prius who only drive a couple miles a day?

 

Because we want to be seen driving in one?

 

I am not sure if it has any catch left knowing that now people prefer SUVs. If gas hits $5/gallon, I am sure my Prius will look good.

 

What would be the best way to achieve WOT without taxing the HV battery too much?

 

California here will hit $4.00 in november due to the governor passing a bill to increase gasoline tax to fund road improvements. But then again this is the governor who raised fee for everything else but the fees never went to any improvement plans he said money was funded toward.

But with artificial closed/shutdown 25% of the oil refinery of the U.S., in Texas, aftermath," I see $5 by early next January then our prius will look way good.

 

Well done Governor!


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