[andrew20195]

Originally Posted by BoostedInPhx

Part of the problem with the short trips occurs because the oil does not get hot enough to evaporate out the water and unburned fuel in it. The oil normally gets contaminated with water and fuel that get past the piston rings during normal operation. The water and fuel are not good lubricants.

Exactly. Not only are water and fuel not good lubricants, when they mix with motor oil, acid is formed. This leads to etching of the bearings, thus, excessive wear. That's why short trips cause more engine wear than trips where the engine is allowed to reach full operating temp.

Of course, all of this is taken into account by the computer's oil life calculations, so as long as you change your oil when you're supposed to, it won't make a huge difference in the long run.

[FirstClass]

Originally Posted by SpdFreak

I'm not sure, but they might be referring to those that don't warm up their cars in the morning after it was sitting in the driveway for the past twelve hours in 18* (degree) weather. Please correct me if i'm wrong.

No. Warming up your car in the driveway is bad for the engine, not good for it. You should always start driving as soon as you start the car.

[AP]

I think also shirt journies because there is water as a by product ( you’ll see it on a. Cold day as either drips or vapour) if the exhaust system is not warmed up any water left in there will sit in there and not evaporate out so potential for the exhaust rust over time

Yeh short journies when not fully warmed up are not great overall.

My car m550 takes about 15 mins for the oil to be fully up to temp.

[R3dLeader]

Originally Posted by AP

I think also shirt journies because there is water as a by product ( you’ll see it on a. Cold day as either drips or vapour) if the exhaust system is not warmed up any water left in there will sit in there and not evaporate out so potential for the exhaust rust over time

Yeh short journies when not fully warmed up are not great overall.

My car m550 takes about 15 mins for the oil to be fully up to temp.

Wow, nice 17 year thread bump. Impressive. I'll play along too.

The n54 takes forever to warm up the oil. Modern engines have many thermal control units to help it heat up faster.

I wonder why the n54 takes so long since the water pump is likely off and the oil cooler thermostat is off until it warms. Seems like BMW designed the engine with a focus on cooling, since it can be a very hot engine. Not much thought put into the warm up time back then.

[oVeRdOsE.]

Originally Posted by R3dLeader

Wow, nice 17 year thread bump. Impressive. I'll play along too.

The n54 takes forever to warm up the oil. Modern engines have many thermal control units to help it heat up faster.

I wonder why the n54 takes so long since the water pump is likely off and the oil cooler thermostat is off until it warms. Seems like BMW designed the engine with a focus on cooling, since it can be a very hot engine. Not much thought put into the warm up time back then.

always curious what is the process to pop out old thread to reply to the topic without any concerns about ''sorry I didnt want to open a new thread'''


I've opened a thread about the fact I put 0$ on my N55 with 170k km and 90% short trips (2-3km) for kids school and groceries .

And no oil leak, no funny noise, no check engine.

So yeah technically its bad, but the engine might survive just fine.