jeverett72

So if you have not heard of this guy he's a Toyota Master Technician (more experienced and certified than a regular technician) at a Toyota dealer in Chicago. In this video he explains how and why oil consumption happens in modern engines and why the way to prevent that is with religious 5k mile or 6 month oil changes. Especially if you drive mostly short trips where the engine doesn't reach full operating temp, or idle your car a lot or are frequently in stop and go traffic. Also why oil that sits in the engine for even 1 year or 2 is a cause of oil consumption.

greys0uled

Does this apply to all Toyota engines? In the video description he lists numerous 4 cylinder engines.

The 2GR-FE in my previous '07 Camry V6 never burned oil. However, my mothers 4 cylinder Camry of the same year would have no oil on the dipstick after 4,000 miles.

Not to mention we use synthetic in our cars so I just can't see a reason. I'm curious.

chinee

Even experts give bad advice. I watched that video recently and he does not come across to me as credible. What he says makes sense, but I know a lot of folks who treat their cars worse who do not have an experience even close to what his "relative" has experienced.

Knucklebus

Things I see wrong right off the bat.

1) The top 2 rings are compression and don't deal with much oil. What oil they do encounter is for lubrication and cooling. The oil rings, the very bottom rings don't need a lot of tension because they are scraping excess oil off the cylinder but not all as the cylinder/piston interface needs lubrication.

2) There is no compression on the bottom of the piston to push the oil rings out. Granted, I've not torn a modern engine down but if there are holes in the oil ring land, it is usually to drain the oil off the cylinder faster. Compression is on the top of the piston.

I stopped watching after that.

chinee

LOL… I stopped after the “relative” story… the BS meter was on high… too much fluff in his storytelling.

charley95

I thought you had to be YouTube Certified to give out this kind of info?!

Gerf

There seems to be quite abit of information in that video that I don't agree with....

jgscott

iTrader: (1)

So what things do you not agree with? I am not contradicting what you are saying at all.

Just interested in more specifics of your statement of what you don't agree with, please.

703

This is the real cause of the 4 cylinder engine he keeps on mention about, not the oil change intervals. He needs to call out Toyota like it is:

https://static.nhtsa.gov/odi/tsbs/20...91611-5448.pdf


The 2AZ-FE engine is susceptible to excessive oil consumption due to oil getting past the piston rings and into the combustion chamber. There have been reports of excessive oil consumption for 2AZ-FE powered Toyota vehicles with mileages as low as 70,000 kms, though it is more commonly experienced from 100,000 to 120,000 kms.


http://m.australiancar.reviews/2AZ-FE-engine.php


I had a car with that engine where it started to have excessive oil consumption at 6 years with just 40,000 km.

Gerf

Most of what he said actually but here are a couple of specifics.....anyone that has done alot of engine work on Toyota's knows that when taken apart there is little sign of wear on the cylinders or pistons( cyls almost always have crosshatch and upper cylinders almost have no ridge... piston skirts usually show little wear. I almost agree with him on the oil rings only because he mentioned the drain holes in the piston which plug up, maybe he meant blowby when he mentioned compression causing that. He lost me when he said the oil rings stick out farther on one side of the piston than the other, nothing you could see with the naked eye anyway.

I spent about half of the 1990's working on 3L 4runners and trucks on the head gasket/eroded deck/ eng rebuilds and short block replacements for the campaign that was going on at that time, total 25 years at Toyota which doesn't mean I know it all but I've seen some stuff.

jeverett72

Using a borescope and compression test on a customer's 2011 Toyota Camry 2AR-FE 4 cylinder with oil consumption due to poor maintenance and more than 5k OCIs done in random fashion


Tearing down a customer's 2016 Toyota Camry 2AR-FE 4 cylinder with oil consumption

jeverett72

Looks like it's mostly 4 cylinder 2AZ-FE 2.4 liter and 2AR-FE 2.5 liter. Haven't heard much about oil burning in either the 2GR-FE or the 2GR-FSE. The Lexus IS 250 and GS 300 also had lots of carbon buildup and oil burning issues.

703

ARs are fine. It’s the later year AZ that has wide spread issues.

703

That Camry has the AZ. Not the ARs. ARs are solid engines still used today.

LeX2K

Of course there is otherwise there would be zero blow by which happens even on a low mileage engine.