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So, do the techs at Lexus actually recommend a particular break-in process or technique for cars made in 2015? From the little I have read, modern engines really do not require this and it's more of a relic of the past.

I've been driving my new RC350F pretty gently, on mile 1800 now.
 

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So, do the techs at Lexus actually recommend a particular break-in process or technique for cars made in 2015? From the little I have read, modern engines really do not require this and it's more of a relic of the past.

I've been driving my new RC350F pretty gently, on mile 1800 now.
From the manual:

■ Breaking in your new Lexus
To extend the life of the vehicle, observing the following precautions is recommended:
● For the first 186 miles (300 km): Avoid sudden stops.
● For the first 621 miles (1000 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.
 

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From the manual:

■ Breaking in your new Lexus
To extend the life of the vehicle, observing the following precautions is recommended:
● For the first 186 miles (300 km): Avoid sudden stops.
● For the first 621 miles (1000 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.
Thanks for posting that.

Was this exactly what they posted or did they get specific about it mentioning RPM ranges people should stick within? Since a guideline like that is much more precise than "do not drive at extremely high speeds," which begs to question... what is that in numbers.
 

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..But I thought all cars nowadays are broken in at the factories? I guess you could use extra precaution but you should be able to run your car from purchase, no?

Cheers
 

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Thanks for posting that.

Was this exactly what they posted or did they get specific about it mentioning RPM ranges people should stick within? Since a guideline like that is much more precise than "do not drive at extremely high speeds," which begs to question... what is that in numbers.
I copy & pasted it from the online manual (page 181) at:

http://drivers.lexus.com/t3Portal/document/om/OM24636U/pdf/sec_04-01.pdf

No mention of RPM ranges or anything. I think it basically means don't track it or drive like a maniac for the first 1,000 km or so.
 

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Yeah basically, however I heard little bursts of going into the higher RPM range can do the engine some good as it helps to build pressure and seat the piston rings and all that jazz.
absolutely, the point is to hit all the points in the rev range, the porblem with break is is people end up doing just the opposite. They drive conservative and end up keeping to a certain rev range which ends up doing more damage then help...
 

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<3 you guys. I have been driving the engine at different revs, but not exceeding the 5,000 RPM. I enjoy hearing the engine >.>
 
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