I purchased new 2024 NX 350h. Is a break-in period period required ? The Lexus sales rep said no, other than don't drive aggressively.

 

The manual says yes - no sudden stops for 200 miles, no towing for 500 miles, no aggressive driving for 1k miles

 

Thanks so much for your reply

 

Had a salesperson say don't over drive over 100mph... Nice line of soup. Not sure about Hybrids...but ...Usually keep the RPM's under x amount for the 1st 1000m. Also vary speed...don't drive at a set speed for long periods.

 

Here is a previous discussion you may be interested in: varying the RPMs on a new car - ClubLexus - Lexus Forum Discussion

 

We picked up our 24 NX350H last month from Los Angeles area and drove 400 miles back to the SF Bay area. It had 2 miles on her when I picked her up.
I varied the speed from 40-80MPH during the trip and no sudden stops nor pedal to the metal acceleration.

 

Sudden stops … on the way home from delivery my wife had to make a panic stop to avoid a rear ender (don’t ask) Must say they do work.
So much for sudden or hard breaking.

 

o extend the life of the vehicle, observing the following precautions is recommended:
For the first 200 miles (300 km):
- Avoid sudden stops.
For the first 500 miles (800 km):
- Do not tow a trailer.
For the first 1000 miles (1600 km):
- Do not drive at extremely high speeds.
- Avoid sudden acceleration.
- Do not drive continuously in low gears.
- Do not drive at a constant speed for extended periods.

SUMMARY : Drive Sensible

YMMV,
MidCow3

 

Good advice here, especially about varying speeds and not stressing anything. Would like to add that "break in" to me includes attention to fluids, especially engine oil. Waiting for the 10K service for an oil change is absurd. There is always "machining debris" from the engine build process and it's best to get it out sooner than later. I changed the oil (myself) at 1K miles (installed magnetic drain plug) and again at 3K in my 2024 NX 350h (Japan build). The first change, to my surprise, revealed more debris than I expected. Second oil change was pretty clean with just traces of metal dust on the drain plug magnet. My NX now has 4K miles and will change oil again at 5K, before or maybe after the complementary dealer service as recommended. If you don't do oil changes yourself, consider using the 5K service offered by Lexus as an opportunity to have them change the oil. It will be at your expense, but you joined this forum because you care for your NX, don't you?

 

A larger magnet over more surface area than a plug is the FilterMag SS250 for magnetic particles . For those that change your own oil, the Fumoto Valve makes the job easier/cleaner. F103sx

 

article on metal shavings/debris and what to do :https://rxmechanic.com/metal-shavings-in-oil/

YMMV,
MidCow3

 

Absolutely change your oil at no more than 5,000 mile intervals and do your first at 1,000 miles to rid your engine of all the manufacturing debris. This 'Car Care Nut' youtuber is a Toyota Master Mechanic that now has his own shop in Chicago area. See this video at 26.30 as this guy has just done his 1,000 mile oil change on his new Lexus GX. He pulls apart the oil filter to show you all the metal and sealant debris residing in your cars original fill oil.


Here's a video of an original owner 2015 Toyota Camry getting an engine change because he had his car religiously serviced at his dealer and followed the owners manual to a tee and changed his oil every 10,000 miles. Listened to and followed his dealerships advise on every detail that they recommended he do to keep his car serviced properly. And at 180,000 miles his engine was consuming 3 quarts of oil every 1,000 miles! Because the 10,000 mile oil change intervals failed him! His cylinder bores and oil rings are pooched and this Toyota Master Mechanic is going to show you how bad everything looks like in the engine as he changes out the short block.

The damage to the engine is shown at around the 11 minute mark.

 

Actually, 180,000 miles on a car means you have had it for quite awhile. at 12,000 typical miles per year, that is 15 years. even at 18,000 miles per year 10 years. I personally don't keep cars that long.
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What kind of metal are you seeing ? Is it all iron/steel which is ferrous and could be picked up with a magnet. Is the also aluminum, copper, brass ,etc. which a are non-ferrous and can't be picked up by a magnet

But the key question, If metal shavings/debris are always present and cause so much damage why oh why do car dealers not have a 1,000 mile oil change. somewhere there is a disconnect?

YMMV,
MidCow3

 

Here's the answer as to why car manufacturers no longer follow engine break in procedures - and why you shouldn't wait till 10,000 miles for your oil changes:

 

I just wondering if you could have given me a simple answer. Sorry, videos from someone else don't really do it for me; I like written words, just old school me.

YMMV,
MidCow3