Oil Consumption

Rod Owner California Posted   Latest  
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Driveability
2007 Lexus GS350 3.5L (2GR-FSE) 6-spd (A760H)
Oil Consumption

We have a 2007 Lexus GS350 with 159,000 miles on it. The vehicle runs excellent and has no drivability issues. But it does have an oil consumption issue. It is using 5/30 conventual oil. compression is good. We used a borescope in the cylinders and they look excellent with a good cross hatch pattern. We have replaced the PCV valve and checked the ventilation system for any restrictions. Lexus has no campaigns or TSB's for this issue. I have heard that Lexus has updated piston rings for this engine but have not been able to confirm this. This engine seems to have known oil consumption problems from some of the forums. Anyone have experienced this issue or problem with this engine? All reply's are appreciated.

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Jordan Owner/Technician
Washington
Jordan
 

Try and do a pressure test on the valve cover/PCV. Bring the RPMs up and drop them off fast. See if there's a deviation in vacuum or pressure from established norms. Might have worn valve stem seals. I've seen this type of consumption on high(er) mileage 4-cyl Toyotas. Try and scope what you can of the valve stems too.

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Glenn Owner/Technician
Texas
Glenn
 

Advise them to switch to a good name brand grade of synthetic oil. Conventional oils have a common issue called burn off and shear. Synthetic oil minimize this problem from what I have seen. I am not aware of any piston ring issues with these engines. There are other makes (like Subaru) who have tried using low tension oil rings and they have been major issues.

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Martin Owner/Technician
New York
Martin
 

I was thinking the same Glenn, had a Suzuki Grand Vitara I bought used with a 2.0L and it would guzzle oil, I used 5W/30 mineral like you and had to top up every few weeks to a month. I changed over to a synthetic blend 10W/30 Quaker State back then and never had to look back. The engine would keep levels till the next oil change. Can be all the other things being discussed here but play around…

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Jordan Owner/Technician
Washington
Jordan
 

So far the best mass produced oil I've found with the lowest volatility has been Pennzoil Platinum/Ultra Platinum. I've seen reductions in consumption in personal and customer cars of greater than 20%.

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John Mechanic
Illinois
John
 

Have seen this problem on other high mile engines; oil drain back holes in heads become restricted, oil hangs up in heads/valve covers at cruise and runs down valve guides as well as PCV system sucking some oil up.

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Jordan Owner/Technician
Washington
Jordan
 

Time for half interval high-detergent oil and top tier fuel!

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Bill Owner/Technician
Michigan
Bill
 

I have seen had previous Lexus engines that would require replacement of valve covers due to restrictions in the baffling for the PCV system. Personally I have not seen much oil consumption issues on this 2GR-FSE motor.

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Rudy Technician
California
Rudy
   

We had the exact same vehicle here with the exact same consumption issues. It would also occasionally smoke out the tail pipe. Dealer told him it was engine time. Based on our experience we suggested trying snake oil from only the finest snakes: i.e Liqui-Moly.(with no guarantee of course) But the stuff is cheap enough to give it a try. We did the service, had him come back a month later and…

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LaMont Owner/Technician
Ohio
LaMont
 

Me personal car is a 2003 Highlander with the same concern. Does yours ever smoke at startup? Every once in a while mine will fog the garage. Most of the time it doesn’t smoke at startup. I’ve tried a couple of chemicals, as I believe the rings may have carbon buildup. It seems to be improving. Funny thing is, if you remove the valve covers, things are clean as a pin.

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Cmore Mechanic
Connecticut
Cmore
 

I would have to agree with Batista about the snake oil. Not saying the guys that suggested switching to synthetic are wrong but in my experience I've had a few customers that just wanted to switch and their cars started using oil so they went back to conventional, go figure?

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Andrew Owner/Technician
Florida
Andrew
 

Cmore, I know you're over at iATN too. Please give this a read and re-consider. members​.​iatn​.​net/forums/search…

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Charles Technician
California
Charles
 

How much oil is it using? 1 quart every 1000 miles is considered within acceptable limits for most manufacturers.

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Andrew Owner/Technician
Florida
Andrew
 

Good morning Rod, I can't offer you any experience specific to this engine. But I do have a few thoughts for you: You mentioned a borescope. You can inspect the tops of the pistons for oil wash. A piston top that is clean around the edge tells you that oil is bypassing the oil control rings and washing the edge. What about valve stem seal leakage? A good practice here is to pull the spark…

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Rod Owner
California
Rod Update
 

Just an update on the oil consumption problem: We performed an engine flush using the BG product then performed an oil change and used the BG MOA additive. We informed the customer to keep an eye on the oil level and let us know if there was any improvement or not. This was the cheapest way to go at this time and evaluate how it would work out. We have been using BG Products with a lot of…

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