steilkurve

Is it required to spare the engine in the break in period anymore? Just got my 2013 GS and wondering if I should refrain from pushing the engine too much initially. Thanks.

Liferules

The manual says so still.

steilkurve

Darn! Was hoping to push her a little this weekend. ;-) What speed should I not exceed?

Liferules

Per 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.

faifai83

Sweet! Break-in is over for me then! @ 1500 miles!

Liferules

Yep, when I passed 621 I was very pleased to begin really playing with this great car.

kssod

Drive it like you stole it, that's what warranty is for......

lildann

I agree. I wouldn't expect it to break down but if it did, I would rather it do it when it's covered by warranty. Ours is my wife's daily driver. She doesn't drive hard but when I'm driving it's a different story. I didn't worry about the break in period and I can bet that if anyone test drove your car before you bought it, they didn't worry about a break in period either.

MY13GS350

I drove mine very carefully the first 700 miles and now intermittently drive it harder as the miles go up, I haven't gone over 5000 rpm yet tho.

I think the break-in period is designed to set in the bearings and work out tolerance issues on wear items like pistons / rings etc, as well as season the metals by not really stressing them with heat and inertia.

steilkurve

Thanks all for the point of views. I actually hadn't read that part of the owner's manual. ;-) And what got me to doubt whether or not break in was still required is actually my Lexus dealer himself. When I bought my previous car, the HS, he told that me engines are tested and broke in at the plant. All required, he said, was to avoid sudden breaking... Regardless, I'm 1/3 of the way there. I'll stick to reasonable driving, just to be on the safe side.

steilkurve

To fuel the discussion... My Lexus salesman emailed me to follow up and see how I liked the car a week later. I took advantage of that and asked him about the required break in period. He told me it wasn't really necessary anymore and the only thing I should try and avoid are sudden stops in the first 300 miles or so. Begs the question, why keep the reference in the manual then? Perhaps a legal precaution...

Room4Tu

My sales advisor told me the same exact thing when I asked him. He said that the ECU will automatically adjust everything to prevent engine or any other internal damage with in the break in period. He also said that afer so many miles (I forgot the number) you should be able to see or feel that the car will become more lively and a little more responsive and faster. I still took precautions regardless to make sure the engine, brakes, rotors, etc.. are properly broken in. Didn't really push it hard until after 1000 miles.