Rislone 4720 to keep EGR system clean?

Pour and Pray rarely works but seems as though people use this to turn off a P0420 to pass inspection... Not sure how it does that, but I'd rather go with cleaning and inspecting and an oil catch can instead of this. But if you were to try this for keeping the EGR cleaner I suspect the amount of material in oil catch can would be less, which would prove that it works... Doing direct inspection of EGR would be a more long term and harder effort than just checking what's in an oil catch can.

 

Yeah, IF.
Why or how would that stuff have any effect on the EGR system?

 

Snake oil.

 

Very sceptical, both about the product and driving style, making any difference. 3rd gen EGR was a poor design, prone to clog (to put it politely). See top 3 links in my signature, and the bottom one, for info on cleaning. (On a phone turn it landscape to see signatures)

 

That stuff is a fuel additive; same stuff you get when you buy quality fuel. People can imagine whatever they want; but comparing a gen2 to a gen3 is like comparing apples to oranges - THEY'RE not the same thing. Gen2s don't regularly pop head gaskets.

IMHO; 5K mile oil changes with full synthetic quality motor oil and an oil catch can; would do more to keep the EGR clean than that gas additive garbage. If you insist on buying a used V; you would need to manually clean the EGR anyways - since you don't know how the previous owners has taken care or not taken care of the car. Also stick to 2015 or newer V's; that's when Toyota quitely made some design changes, to make the motor more reliable and burn less oil.

Good Luck........

 

^Quit using low-friction piston rings, ostensibly to eke out a slightly better mpg stat, but in hindsight prone to oil consumption.

 

Well, it could possibly be true. If it's a 2015 or later. Because Toyota updated the pistons
and rings so you don't have the oil burning issues. So it's not clogging up the egr cooler, or
the intake egr ports.

And if he's changing the oil at 5000 miles, and doesn't drive hard, it could be possible.
But then, it could fail at any time. His car could be running like crap. And he doesn't notice it
because it has been gradual.

Is he the original owner? Or the 2nd or 3rd, etc? Someone might have already cleaned the
egr system and replaced the head gasket.

And just because "1" person does have an issue, that doesn't make it the norm.
Remember, even a broken clock is correct twice a day.

 

I could tell you I have never had any work done on my 2012 v with 355,000 miles. I would show you the golden oil, clean engine, original cat and accept $10k cash after you marveled at the clean body, interior and functioning electronics.

I would give you a bill of sale with a line about sold as is snd ask for a copy of your drivers license and insurance.

It would be yours for better or worse.

It would all be true except for the never had work done. That part would be a lie unless I said I never had to do any work on it (myself).

 

What kind of testing has been done to verify what he says is true? You know some people put blocking plates to bypass EGR systems and those engines run fine too. Point is that you don't know; unless you dig into it.

I would also manually monitor the electric water pump and ECT; since they are known to silently go out after 150K. Waiting for the temperature warning lamp to light up is too late, since it doesn't trip until 248+F - nominal operating temperature for that engine is <200F in 100+F weather with the AC going full blast. You'd think the car is fine running at 245F all day every day; until you blow that head gasket.

Again; anyone can believe anything they want - It's a free country; but that doesn't make it true.