[habs33]

Hi all,

have been driving my 335xi GT M-sport for about a month now and have around 500km

its my first Bimmer so i was wondering what is the typical break in period for the 335 engine?

so far most of the driving is in comfort mode and must say am not impressed with the power….especially torque.

at the sametime i don't want to drive it too hard right now since its new this is why i ask about the 'break-in' period.

[TheBingoBalls]

It's in the manual. 2,000km IIRC.

[Kafkaesque328]

what break in period?

[RIOBLAST]

My dealer laught when I asked about it and told me to push it from day one...

Every demo car at the dealer is driven flat out from the start and with a cold engine aswell.

[Dark-Sider]

No break in period will result in:
- higher oil consumption
- less hp / torque
- earlier engine failure

The dealer's demo cars are for sure affected by all of these. But the dealer will never know, because he sells the car after 6 months.

Modern cars and their engines can take a lot of stress. The engine won't fail immediatly if you drive a car with 0km from the dealer straight to the Autobahn.

Braking in is advised because the cylinders and pistons have very very small fabrication annomalies. If you run the engine at low revs they grind evenly off and they become a perfect match. If you put too much stress on the engine, "lager" (but by no means really large... :-) chunks break off and the engine loose a small amount of efficency.

During the first 2000km - just keep your revs low (below 3/4 max rev.) drive at alternating speeds/revs highway/interstate/city etc. and you'll get the optimum out of your car.

Btw: breaks, suspension and tires also need ~300km to be fully functional!

bye,
Darky

[habs33]

Originally Posted by RIOBLAST

My dealer laught when I asked about it and told me to push it from day one...

Every demo car at the dealer is driven flat out from the start and with a cold engine aswell.

yes that's b/c he would love to service your car…this is how they actually make $$. in warranty or not, someone has to pay for his time which is expensive.

[habs33]

Originally Posted by Dark-Sider

No break in period will result in:
- higher oil consumption
- less hp / torque
- earlier engine failure

The dealer's demo cars are for sure affected by all of these. But the dealer will never know, because he sells the car after 6 months.

Modern cars and their engines can take a lot of stress. The engine won't fail immediatly if you drive a car with 0km from the dealer straight to the Autobahn.

Braking in is advised because the cylinders and pistons have very very small fabrication annomalies. If you run the engine at low revs they grind evenly off and they become a perfect match. If you put too much stress on the engine, "lager" (but by no means really large... :-) chunks break off and the engine loose a small amount of efficency.

During the first 2000km - just keep your revs low (below 3/4 max rev.) drive at alternating speeds/revs highway/interstate/city etc. and you'll get the optimum out of your car.

Btw: breaks, suspension and tires also need ~300km to be fully functional!

bye,
Darky

Thx Darky! for the amount of consumption the N55 engine uses i don't see a real benefit over the 328.
I figured to get the Heavier GT xdrive model moving quicker the 335 is a better choice. almost seems like i need to drive in sport+ mode to see a real difference.

[RIOBLAST]

Originally Posted by habs33

yes that's b/c he would love to service your car…this is how they actually make $$. in warranty or not, someone has to pay for his time which is expensive.

I guess so. I did as the manual said anyways, just to be sure...

[ybbiz34]

Originally Posted by habs33

Hi all,

have been driving my 335xi GT M-sport for about a month now and have around 500km

its my first Bimmer so i was wondering what is the typical break in period for the 335 engine?

so far most of the driving is in comfort mode and must say am not impressed with the power….especially torque.

at the sametime i don't want to drive it too hard right now since its new this is why i ask about the 'break-in' period.

If you perform a search, you will see many, many discussions concerning the break-in period.

Personally, I do not strictly adhere to the manufacturer's suggested break-in. I follow it somewhat (e.g., I keep the car below triple digit speeds for the first few hundred miles as the tires break in).

I avoid WOT throttle operation for the first 4-500 miles as well. Furthermore, it is good to vary the engine speed during the first 1,000-1,200 miles. Too much highway driving in the same gear at the same engine speed isn't the best for the motor.

However, most of the time, after the car's vital fluids (oil, in particular) have reached normal operating temperature, I let 'er rip. For me, this has always resulted in "strong" motors that don't burn oil, make the power they're expected to make, etc.

[Crisp]

Unless you are beating the crap out of the car from the start, there is no point in a "break-in period" anymore with these cars.

BMW does not put a different type of oil in there like they do with the M cars for the first 1,000 miles.

Also, you'll be lucky to see results from breaking in a car after 100,000 miles. How many of us are keeping these cars past 60k miles and more than 5-6 years?

[TheWhiteStig]

Originally Posted by RIOBLAST

My dealer laught when I asked about it and told me to push it from day one...

Every demo car at the dealer is driven flat out from the start and with a cold engine aswell.

Was joking with the salesmanager the other day, and he said: "Never trust a salesman!" I think he was only half (maybe less) joking on that thou.

[habs33]

Originally Posted by ybbiz34

If you perform a search, you will see many, many discussions concerning the break-in period.

Personally, I do not strictly adhere to the manufacturer's suggested break-in. I follow it somewhat (e.g., I keep the car below triple digit speeds for the first few hundred miles as the tires break in).

I avoid WOT throttle operation for the first 4-500 miles as well. Furthermore, it is good to vary the engine speed during the first 1,000-1,200 miles. Too much highway driving in the same gear at the same engine speed isn't the best for the motor.

However, most of the time, after the car's vital fluids (oil, in particular) have reached normal operating temperature, I let 'er rip. For me, this has always resulted in "strong" motors that don't burn oil, make the power they're expected to make, etc.

Thank you

[habs33]

Originally Posted by Dark-Sider

No break in period will result in:
- higher oil consumption
- less hp / torque
- earlier engine failure

The dealer's demo cars are for sure affected by all of these. But the dealer will never know, because he sells the car after 6 months.

Modern cars and their engines can take a lot of stress. The engine won't fail immediatly if you drive a car with 0km from the dealer straight to the Autobahn.

Braking in is advised because the cylinders and pistons have very very small fabrication annomalies. If you run the engine at low revs they grind evenly off and they become a perfect match. If you put too much stress on the engine, "lager" (but by no means really large... :-) chunks break off and the engine loose a small amount of efficency.

During the first 2000km - just keep your revs low (below 3/4 max rev.) drive at alternating speeds/revs highway/interstate/city etc. and you'll get the optimum out of your car.

Btw: breaks, suspension and tires also need ~300km to be fully functional!

bye,
Darky

I noticed this about the brakes

[RIOBLAST]

Originally Posted by TheWhiteStig

Was joking with the salesmanager the other day, and he said: "Never trust a salesman!" I think he was only half (maybe less) joking on that thou.

He might just be crying on the inside... Why is every used car "good looking", "perfect condition" and so on? Someone must be lying I've even seen "- Never driven in rain...".