bladest

Hi my car gs450h fron the previous owner had missing 6 years of engine oil change interval around 100.000km at least as minimum i immidiately changed the oil when i receive it with liquid moly 0w40 i plan to change it in 5000km again this time with motul chrono 5w 30 power racing double ester technology. , which will be changes each 8000km after that what i can do to prevent more engine damage and damage to the car? I dont want to change engine of the car even used it cost a lot please advice should i do engine flush additives or something de tox procedure? Or something else. , car is year 2012 and more than 200.000miles currently

Knucklebus

DO NOT DO ANYTHING! Unless you know for a fact that the oil was not change, instead of simply not documented, don't screw with it beyond regular oil changes.

First, look at the under side of the oil fill cap. Is it sludged up? Look down inside the engine through the oil fill hole. Do you see a lot of sludge there? If not, you probably don't have a lot of sludge. Change the oil with a good quality synthetic like Mobil 1. It will slowly and surely remove a lot of the sludge over time. Give it time to work.

If you want to have a valve cover pulled off, you can look there and that will tell the fact of the sludge. If there is not much sludge there, again, good quality synthetic oil like Mobil 1.

If you find excessive sludge, you can use a flush as a last resort. I personally wouldn't do it if it holds good oil pressure and has no performance issues. A good quality synthetic oil is all you need but it may take a while. It took years to make the sludge, it could take a year or more to reduce it safely without harming the engine through regular oil changes.

If you must do a sludge flush, I have used 1qt of automatic transmission fluid in the crankcase about 100 miles before you change the oil. Transmission oil is very high detergent oil and won't hurt the engine. Do not drive aggressively or use high RPM. Do a normal oil change. You can repeat this 100 miles before every other oil change for further cleaning.

bclexus

I bet the oil and filter were changed numerous times during the time the previous owner had the car. You just don't have the receipts or records for proof.

Just use the recommend Toyota oil and oil filter. Change it again in 2,500km and then every 5,000km if that is your plan.

bclexus

Ah, power racing oil with double ester technology!

peasodos

iTrader: (1)

Yeah I bet the oil was changed, just a DIY job or a shop that's not the dealer. My car for example has no records since I purchased it, because I do all the work myself. I set all the maintenance reminders in the infotainment system.

This guy continues to freak out about his high mileage 450h.

When I buy a new used car I change filters and do an oil change right away, inspect brakes ect, then I know the car is good to go.

charley95

At least take a flashlight and remove oil cap and peek into the small area for sludge buildup.

Knucklebus

Exactly! My car will show no dealer service beyond the brake recall since 2019 and 35,000 miles ago yet I've done everything myself.

bladest

Trust me i know my car better than you, car never had spark plug replacement gearbox oil change differential oil change etcs for the whole life and engine is in bad shape i dont want to replace it , i want to prevent for future issues and big repair bills thats why my topic is here, last onwner was simply driving without maintenance and thats all. I received the car with numerous errors in the dash etc...

LeX2K

Then why are you asking people for advice?

charley95

I record my maintenance records on the Lexus Owners website and file my receipts.

bladest

I am aware that , dealership exists for servicing in usa, and also independant shops, and also dyi maintenance,
but previous owner have done none of these.
I need advice how to prevent his neglegace so i can prevent expensive swapping of another used engine in the near future

ItzFilyO

Ah here we go again. Mr. Bladest is back with this oil change thread.

Pass me the biggest bag of popcorn boys!!!!!

bladest

I can pass you big bill of repairs...
please cooperate , to everybody over this forum i need assistance.
i payed a lof of money for my car it was bought when chips was on crysis.
so it worth nothing i need to fix it in order to be able to drive it 10 or more years, without any problems.

bclexus

bclexus

You got it my man!