7schulz

My question is for those of you who have had your LS for good number of miles or have a better understanding of the 1UZ. I picked mine up with 150K with excellent dealer maintained records and driven by an old lady. I have the best Syn (M1 0W-40) I could find in the engine and trans(M1 Syn ATF). I want this car to make it to around 300K before I have to get another one but don't want to drive like a grandpa all the time. How stressed is this engine even at the 6K redline. Is it over designed and under stressed? Who has 300K and has driven their LS with a more sporty attitude for a good deal of its life with good to excellent maintenance. Looking for some facts or personal experience. Most of the miles will still be highway or interstate but I don't want to have to worry about pushing it as she ages.

PureDrifter

iTrader: (10)

300k is nothing for a properly maintained 1uz.

vietunit

iTrader: (5)

+1 with PureDrifter.

I'm only @ 120k only a "decently" maintained 1UZ, but its still good.

My cousin is near 200k on his 2LS and it pulls even harder and pushes it hard everytime.

Keep up maintenance, treat her wll and she'll treat you better.

LiCelsior

iTrader: (32)

im at 189k just did timing belt and she still purs like it was a 30k car. of course driving low has taken it toll as things started squeaking and etc. mechanically though, its golden...except for power steering lol.

Brandicus

iTrader: (6)

225k over here, just do the basic maint and drive. leave your worries at home with the misses.

Banshee365

I'd personally only run Toyota T-IV fluid, nothing else. There may be others that are compatible, but I wouldn't touch anything else but T-IV from the dealer.

The 1UZ's longevity is uterly rediculous. Mine has 220k and doesn't tick, knock, or burn a single drop of oil. Also runs like new. Just keep the oil changed with an OEM Toyota filter and the timing belt intervals kept up and you'll be good. A perfect engine can suffer serious damage if the timing belt breaks. I run 5W30 or 10W30 Mobil 1 as that's what is recommended. The 0W40 is a german car formula and I run that in my wife's 1.8T VW. It may be alright but it's hard to go with anything else than what Lexus recommends.

7schulz

M1 Syn ATF says T-IV right on the back. I'll report back in 5K to see how the 0w-40 did, after a fair ammount of reading most wear occures at start up and 0w flows better at start up and I was looking for something just a little thicker for summer and bc it is higher mileage.

7schulz

Why are you so confident it is just warmed up? Did you do a partial tear down and look or take measurements? Or just bc. it doesn't burn oil or make noise?

ROPADOPA

had mine for 10 years , bought it with 150 ish , wife drove it easy to 250 ish , then got her a newer 430 , then i modded hers and its giving up @ 275 ish. rod knock,

Most people say it will last forever but truthfully 300 thousand is allot and i have not seen any other motor go that far. not really mad at it its been a good run. An di may even do a replacement motor.

It seems that people with less miles have high hopes. lol

OLSkOLVIP

iTrader: (3)

Hey Guys

I'm new to this fourm but always been a fan of the Lexus LS series. Since it was introduced in 1990 as a North American model. I'm asian so back in 1998 I visited my relatives in Hong Kong with my uncle and aunt. That was when I got my very first impression of a 1994 LS 400. My other uncle owned one in Hong Kong. There were a few differences in options but prettry much the same car in a Toyota badge aka CELSIOR.

As far as long longevity goes my uncle came back to Toronto and not long after bought a 2000. He a real estate agent and drives more the 3 people drive in a year. Last week I was by his house to talk and showed him my newly aquired 1993 LS4. He said I got the deal of a lifetime because PO really maintained this LS4 very well.

My 1993 LS4 is only got 265000kms= aprox 164654miles
My uncle's 2000 LS4 is got aprox789000kms= aprox 4900235miles no major issues besides the normal wear and tear items (alternator, ball joints, battery, belts, radiator, starter, struts, timming belt, tires, rust proofed yearly, waterpump) but he keep up with maintanience mostly done with LEXUS dealer because he writes it off for business. He hopes to get 1000000kms out of it. Hopefully Lexus Canada will take it in and put it on display on a trade for a new LS460L or LS600h

He doesn't drive hard because most of the time he's got clients or family sitting in the back. I think maintainance and how your drive your car will determine how long it will last as well as luck too. I also believe if you are lucky and get a cream of the crop. Not everything is built equal even cars built on the same plant right after each other. So sometimes depends on your luck.

OLSKOLVIP

bmoore

Don't overthink it. You don't have the knowledge or experience that Toyota's engineers do. If you use what they specify, you'll have the best shot.

I also didn't see timing belt service in your list. That is far more important for longevity than a particular type of oil, because I can state FOR A FACT that the '95-96 cars ARE interference motors and WILL lunch themselves with a timing belt snap.

Banshee365

I see that alot. It's a figure of speech at best. I hale mostly from the military truck and light duty diesel truck world as far as my experience and see this alot. Such as, "My 12v cummins is only barely getting broken in at 200k miles." The fact is that even the longest lasting diesel engines are plenty broken in at 5k-10k, unless they've ran synthetic from the start which is a problem as you may know. I'd guess the 1UZ is considered broken in around 3k-4k or so and they last a long time because they wear well and are built with high quality materials. It's a feel good thing until they start developing a tick, knock, etc... Then the engine goes from barely broke in to worn out in a few day's.

ck90211

I am not too surprised about life of 1UZ-FE or diesel engines; after all, most components in them are bigger and beefier than most smaller displacement, they rev lower, and just carry a lighter load (weight of car/# of cylinders).

What surprises me about Toyota engine reliability is some of their most reliable engines are smaller, such as the Corolla engines (1.6, 1.8, 2.0L), the pre-Tacoma trucks (2.2, 2.4 and 3.0L), the Previa, and the 6-cylinder Landcruisers. These are all known to last long on crappiest fuels and environment (think of 3rd world). At least most LS's are pampered from day 1.

Bill Dowd

a friend of mine ran his 1990 LS 400 to 568,000 using mobil 1 through out the car I ran a toyota cressida 529,000 using mobil 1 Same motor and trans and power steering and
A/C and my 1990 LS 400 at 240,000 and no oil burning or any problems just take care of the car it will go and go and go there is a rumor in the Southern Caifornia there ia a 1990 LS 400 with a MILLION MILES PLUS and still running I am trying to locate it and put on our site here .There is a Lexus ES300 with 800,000 miles same engine 1 trans not bad for a Toyota Camry I consider 500,000 miles normal for a LS 400 with good oil changes

7schulz

I know the phrase "just broken in" I wanted to know why you thought that. The car is on it's second timing belt it was done at 74 and 130K so I'm good there. I'm a ME by schooling and did valve train design for CAT and now work for the best HD auto transmission manufacture in the world. Is there any acutal engineering or specs or tolerances out there.
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