2013 90k miles burns oil. Use 0-30?

I switched to 5w30 also make sure you change the oil every 5000 miles instead of 10000.

 

Our Prius v doesn't burn oil at 33k mi. On our other car I use Lucas Oil Stop Leak 20% of oil fill per instructions on label. I did not change the oil weight used....

REVVL V+ 5G ?

 

Oil flow is reduced with a thicker oil which cools a lot of internal engine parts, lubricales the timing chain and sprockets, and as well operates a lot of variable valve timing actuators. Adding a thicker oil may cause the engine run hotter and starvation of lubricaltin through older cloggeg passages might actually shorten the life of the engine.

If the oil passages in the oil control rings are clogged or stuck and the cylinder walls are worn, thicker oil is not the answer.

 

before changing oil type, cleant the engine and egr circuit to see if that improves the burnng

 

Depends on how much is burned.

Mine burns less than the amount from full and low lines on the dipstick after 10k miles. Therefore, I do nothing.

If it starts burning more than that, I might start adding a quart at 5000 miles or change to 5000 mile OCI as suggested above.

I wouldn't go thicker until maybe a quart every 1000 miles as there are other consequences to that also detailed above.

 

Yes, the faster the flow; the more heat removed.

Just like a fan blowing on you.

 

@chuckiechan whats your rate of oil consumption?

Also, please vote/comment here:

3rd gen model year and oil consumption | PriusChat

 

Definitely not. The viscosity of any oil decreases with increasing temperature---some more than others.

 

I would try moving to 5w20, first. My old Prius C started burning a quart every 10K @ around 75K. It slowed it down to a pint lost every 10K. If your not using something like Castrol or Mobile1; try switching to those brands first. The cheaper oils tend to breakdown and get thinner as you start stacking-on the miles.

Hope this helps..

 

I agree with Georgina on this subject. The oil consumption problem is the rings, not the intake, egr, viscosity or pcv. Once the rings start sticking the cylinder walls develop uneven wear. There will be a definitive start of oil consumption and it will get worse. The cylinder wear will accelerate blowby impacting the egr, intake and pcv circuits.

On my 2012 the oil consumption started around 150k miles but we are seeing more of these lower mile examples as vehicles age. There is one other possibility, eg valve seals. But those have not been a recurring issue on these engines and rarely cause excessive consumption by themselves.

Some believe a careful cylinder soak might unstick the rings but it would have to be used early before excessive consumption is present. A mistake with a soak could ruin the engine.

A real concern is running out of oil. Which happens and is often a kiss of death for the engine. So if it is burning fast, frequent top offs are essential. In most cases excessive oil consumption requires a rebuilt engine.

------------+----++-------
Root Cause in 2010-2014 Prius

Toyota acknowledges and offered free rebuilds for flawed piston rings in 2010 - mid 2014 Prius engines. However they only offered it through 5 years or 60,000 miles. If the oil consumption exceeded a quart every 1200 miles. Prius was not the only engine impacted, Camry and others during the time period had the same bad design. These things Toyota admit.

The side effects of oil consumption cause blowby, vaporized oil and combustion gasses caused by the increased ring and cylinder wall wear. Tremendous amounts of carbon buildup develops in the intake, cylinders and the cylinder head. Enough to cause knock (preignition) in the worst cases. A pool of muck develops in the built in oil catch can called the intake manifold. Slugs of this end up in the cylinder. Toyota knew about these side effects as well and quickly revised the intake manifold with little to no effect. Many believe the 10k oil interval aggravates the root cause piston ring to cylinder wall wear.

It is clear the gen4 1.8L engine was significantly redesigned to dramatically improve cylinder wall temperatures, intake and egr designs. Some are experimenting with gen4 engines in gen3 Prii, usually with the old intakes and egrs due to fit and computer considerations.

 

Unfortunately, by the time you get to burning oil, you can slow the degredation, but you cannot stop or reverse it to that of the new engine, The only way to get back to a new engine condition is a complete rebuild or a new engine.

Frequent oil changes with the removal of detritus and oil thickening sludge causing piston ring sticking and oil ring passages, as well as contaminants that coat close oil passages is the key to long engine life and slowing the onset of oil burning.

Contrary to Toyota's claims that every new Toyota comes with two years of FREE service that includes oil changes, it is not free. It is built in the the price of the vehicle. You have paid for it. Increasing the oil change interval to 10k miles means that Toyota has reduced their outlay by 50%.

The start stop cycle of Prius engines should be the reason for more frequent oil changes, since it mimics the start stop driving of taxi cab and delivery vehicle driving rather than highway miles. Accordingly, 5k miles should be the highest limit that the oil should be in use before ihe oil is changes.

 

On Fuelly you can see a slight but definite downtick in mpg, in the 2015 Prius. Toyota was striving for best mpg, but pushed to far with the low-tension rings (employed in earlier years).

 

I don't recall seeing anything here to confirm that the rings are the problem.
I only remember one person taking the engine apart, and the rings on those pistons were free.

Certainly the can, and do cause oil leaks, and does hardened valve guide seals.
Maybe next time someone has to replace the whole motor they can take it apart and see what they look like??

 

Apparently all the talk about egrs around here has obscured the Toyota TSB and Customer Support Program replacing pistons and rings on 2010-14 Prius 1.8L engines.

See attached

Other Toyotas also had defective piston and ring assemblies.

• 2007-2011 Toyota Camry HV (Hybrid)
• 2007-09 Toyota Camry
• 2009 Toyota Corolla
• 2009 Toyota Matrix
• 2006-08 Toyota RAV4
• 2007-08 Toyota Solara
• 2007-09 Scion tC
• 2008-09 Scion xB

 

I don't recall seeing anything here to confirm that the rings are the problem.
I only remember one person taking the engine apart, and the rings on those pistons were free.

Certainly the can, and do cause oil leaks, and does hardened valve guide seals.
Maybe next time someone has to replace the whole motor they can take it apart and see what they look like??

 

Is it even possible for these engines, even at low mileage in prime condition, NOT to harbor "a pool of muck" (i.e., light coat of oil near the throttle plate, mixed with carbonaceous muck beyond the EGR entry point)?
What is dramatically defective about the cylinder wall temperatures? How do you know that?

 

One of many gen4 engine revisions