All years of this gen burn oil ??
01-05-22, 03:49 PM
#31
My sister's 2010 GS350 AWD burns oil like CRAZY at 150k miles. Can't say about the maintenance before she bought it, but she was getting synthetic oil changes every 3k miles for the first two years of owning it and the oil burning started after one year. It's bad, like a quart a month. No blue smoke out the exhaust and no leaks as far as we can tell.
Car runs great otherwise but it sucks that a $5k engine job is the only real fix. We're probably going to try soaking the cylinders and maybe that'll help...
Car runs great otherwise but it sucks that a $5k engine job is the only real fix. We're probably going to try soaking the cylinders and maybe that'll help...
01-05-22, 09:27 PM
#32
My sister's 2010 GS350 AWD burns oil like CRAZY at 150k miles. Can't say about the maintenance before she bought it, but she was getting synthetic oil changes every 3k miles for the first two years of owning it and the oil burning started after one year. It's bad, like a quart a month. No blue smoke out the exhaust and no leaks as far as we can tell.
Car runs great otherwise but it sucks that a $5k engine job is the only real fix. We're probably going to try soaking the cylinders and maybe that'll help...
Car runs great otherwise but it sucks that a $5k engine job is the only real fix. We're probably going to try soaking the cylinders and maybe that'll help...
If the piston rings are clogged, then you can try pouring chemicals directly into each spark plug hole. Keep an eye on the fluids height if the fluid drains quickly then know that pistons rings are clogged.
Heres a video showing how to pour into the spark plug holes
04-23-22, 10:57 PM
#33
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Oil issue
I would highly disagree that this oil consumption problem is from lack of maintenance. I have an '08 GS350 currently plagued by this issue, and my vehicle receives constant attention from my local Lexus dealer. While changing the spark plugs and PCV valve can slightly decrease consumption, the only fix is to replace the piston rings. The dealer suggested that switching to Mobil1 could help, however, I'm not gung-ho to spend extra money on oil that will eventually be consumed.
I, too, have done an induction cleaning, cleaned the throttle body, and ensured everything else was in top-spec; to no avail.
This is a known defect that Lexus chooses to dismiss as "normal". Even my service advisor agreed that he has never heard of an "oil consumption test" until he started working for a Toyota/Lexus dealer ....
I, too, have done an induction cleaning, cleaned the throttle body, and ensured everything else was in top-spec; to no avail.
This is a known defect that Lexus chooses to dismiss as "normal". Even my service advisor agreed that he has never heard of an "oil consumption test" until he started working for a Toyota/Lexus dealer ....
05-19-22, 07:58 AM
#34
All GS's 2006-2017 use the same exact piston rings! The induction design of the direct injection 2006's GS300 (US models) has a slight flaw in that the valves dont get washed by the fuel allowing carbon deposits to build up on the valves and pistons then eventually making its way to the rings. 2007-up with GS350 there have been a lot less oil consumption problems.
The reason for the 07-17 that have oil issues are most likely from poor maintenance and not taking extra steps. I use standard oil castrol GTX but I change my oil more often then what a person would do with synthetic oil. I also do induction cleaning, throttle body cleaning, spark plugs, and other basic maintenance. Im close to 170k miles and thankfully no issues on my 08 gs350 awd.
Also with the coolant its best to replace water pumps every 80k miles and fluid change.
The reason for the 07-17 that have oil issues are most likely from poor maintenance and not taking extra steps. I use standard oil castrol GTX but I change my oil more often then what a person would do with synthetic oil. I also do induction cleaning, throttle body cleaning, spark plugs, and other basic maintenance. Im close to 170k miles and thankfully no issues on my 08 gs350 awd.
Also with the coolant its best to replace water pumps every 80k miles and fluid change.
I’m including a pictures of the product that I used in my engine AT-205 reseal and what it does to a brand new O Rings, it was only soaked in this container overnight the left one is the original size
Last edited by User 122922; 05-19-22 at 08:02 AM.
05-19-22, 12:07 PM
#35
All GS's 2006-2017 use the same exact piston rings! The induction design of the direct injection 2006's GS300 (US models) has a slight flaw in that the valves dont get washed by the fuel allowing carbon deposits to build up on the valves and pistons then eventually making its way to the rings. 2007-up with GS350 there have been a lot less oil consumption problems.
The reason for the 07-17 that have oil issues are most likely from poor maintenance and not taking extra steps. I use standard oil castrol GTX but I change my oil more often then what a person would do with synthetic oil. I also do induction cleaning, throttle body cleaning, spark plugs, and other basic maintenance. Im close to 170k miles and thankfully no issues on my 08 gs350 awd.
Also with the coolant its best to replace water pumps every 80k miles and fluid change.
The reason for the 07-17 that have oil issues are most likely from poor maintenance and not taking extra steps. I use standard oil castrol GTX but I change my oil more often then what a person would do with synthetic oil. I also do induction cleaning, throttle body cleaning, spark plugs, and other basic maintenance. Im close to 170k miles and thankfully no issues on my 08 gs350 awd.
Also with the coolant its best to replace water pumps every 80k miles and fluid change.
05-20-22, 07:11 AM
#36
How long do spark plugs normally lasts I got mine replaced last year and now I’m gettin misfire in cylinder 1&6 and my car shake very bad at stop and even worse when A/C is ON, I bought my OEM spark plugs from eBay maybe they were bad ??? Do you still using castrol gtx syntactic blend ? Or have you switch do different brand ? I’m leaning toward any good quality synthetic blend I feel my engine is not meant to run on full synthetic after seeing the history of the car which was running conventional for the entire ownership !!!
I still use Castrol GTX and oil changes every 2800-3000 miles. Zero oil issues! I am close to 210k miles on my 08 GS350 awd
The following 2 users liked this post by ibidu1:
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User 122922 (05-20-22)
05-20-22, 07:58 AM
#37
OEM or Denso 3473 (part number FK20HBR11) iridium plugs 80-100k miles they should last. How much did you pay for your ebay oem spark plugs and was the seller from a lexus dealer? If you purchased a whole set of "oem" plugs for $20 bucks then more likely there fakes. Denso or OEM plugs prices start from $11 each plug. If you have a misfire driving with the misfire, will send unburnt fuel to the Catalytic convertors and will eventualy destroy them. Cats are very expensive so I suggest you fix it as soon as possible. You are better off taking it to a good mechanic.
I still use Castrol GTX and oil changes every 2800-3000 miles. Zero oil issues! I am close to 210k miles on my 08 GS350 awd
I still use Castrol GTX and oil changes every 2800-3000 miles. Zero oil issues! I am close to 210k miles on my 08 GS350 awd
I buy all my Lexus parts from https://parts.belllexusnorthscottsdale.com and sometimes from their shop on eBay they’re trusted Lexus authorized dealer they always run 15-20% cheaper than any dealer around, the spark plugs are the same exact part number you mentioned, i did check my battery and alternator and found out the volt regulator is “FAILD” could this be faulty alternator or battery ? I changed my battery last year from Costco intestate group 24,, and I also bought remanufactured alternator just got delivered yesterday Do you think alternator can cause all this !!? 🤔
Last edited by User 122922; 05-20-22 at 08:03 AM.
05-20-22, 10:40 PM
#38
I buy all my Lexus parts from https://parts.belllexusnorthscottsdale.com and sometimes from their shop on eBay they’re trusted Lexus authorized dealer they always run 15-20% cheaper than any dealer around, the spark plugs are the same exact part number you mentioned, i did check my battery and alternator and found out the volt regulator is “FAILD” could this be faulty alternator or battery ? I changed my battery last year from Costco intestate group 24,, and I also bought remanufactured alternator just got delivered yesterday Do you think alternator can cause all this !!? 🤔
05-21-22, 05:45 AM
#39
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