335i - At what point is it considered warmed up?
Discussion
I keep mine to normal driving until the oil temp needle moves, which mostly means keeping it under 3k rpm as I simply don't need more in daily driving. I also do not idle the engine before setting off as that is just a waste of time / fuel.
I won't 'lug' the engine at low rpm and I disabled the gear shift indicator to stop the car encouraging me to be in too high a gear.
I won't 'lug' the engine at low rpm and I disabled the gear shift indicator to stop the car encouraging me to be in too high a gear.
Edited by Mike335i on Friday 5th July 11:35
Yeah this makes sense. I always thought the oil took much longer to get up to temperature before the engine does. I keep it below 3K until around 80c. I have a manual 335i so it's a little easier for me to manage the revs.
I just wanted to be sure I wasn't killing the car by not waiting until the oil temp needle was halfway.
I just wanted to be sure I wasn't killing the car by not waiting until the oil temp needle was halfway.
moebiusuk said:
Yeah this makes sense. I always thought the oil took much longer to get up to temperature before the engine does. I keep it below 3K until around 80c. I have a manual 335i so it's a little easier for me to manage the revs.
I just wanted to be sure I wasn't killing the car by not waiting until the oil temp needle was halfway.
No that's fine. I have a JB4 fitted to mine and that monitors the water temp. and disables mapping until it's warmed up sufficiently. The JB4 starts working long before the oil temp is halfway on the gauge.I just wanted to be sure I wasn't killing the car by not waiting until the oil temp needle was halfway.
Krikkit said:
Depends on the range of the gauge, but certainly once the needle starts moving it'll be reasonably warm.
Modern engines and oils are massively capable, the old school thinking of revs = death when not fully warmed up just doesn't follow.
This is true. Someone her once posted a viscosity v oil temperature chart, and that showed viscosity at starting temperature to be quite close to that at ‘warmed-up’ temperature. Modern engines and oils are massively capable, the old school thinking of revs = death when not fully warmed up just doesn't follow.
I would say modern petrols or diesels warm up fairly quickly.
With a 3 litre (petrol or diesel), there is little on-road power that needs to be foregone by driving moderately until the oil temperature gauge gets to 75 degrees
joe1145 said:
I wondered the same on my 335i.
I'm sure I read it in the manual that 100-120deg was the operating temp of the engine, so I normally leave it until 100deg to give it full revs.
That is the normal operating temp, as in that is what the car aims for and starts cooling it back down if it goes beyond it.I'm sure I read it in the manual that 100-120deg was the operating temp of the engine, so I normally leave it until 100deg to give it full revs.
Car is happy enough with full revs much sooner, I'm cautious but am happy revving it out from 70°c+ (i.e. when the needle moves). It's form then on that the oil temp guage will show a reading, so that green bar appearing is like a green light to me!
I have a jb4 box that I inherited with the car on my n54 335i and it doesn't engage until the oil temp has moved a fair bit, so for most of my journeys I cant access the full 'tuned' power from my box as I only work 10 mins from my home, I think it s a bit of a bummer especially in the winter whereby the car takes longer to warm up, it renders the box pointless to me. So if I go home car has cooled a bit and I want to pop to asda or something, then still no joy but surely the oil must be worked around the engine by that point as I have driven the car twice that day?. I personally believe and understood about 10 mins is enough but that was years ago I was told that, cars are different now
moebiusuk said:
Yeah this makes sense. I always thought the oil took much longer to get up to temperature before the engine does. I keep it below 3K until around 80c. I have a manual 335i so it's a little easier for me to manage the revs.
I just wanted to be sure I wasn't killing the car by not waiting until the oil temp needle was halfway.
Kudos for the manual gearbox. I had a manual e90 335i and they were like hens teeth.I just wanted to be sure I wasn't killing the car by not waiting until the oil temp needle was halfway.
My recollection is that the car had an active rev limiter, which kept the engine speed a little lower than the maximum until there was some temperature in the oil?
I think the bigger issue with these cars was to coast in and let the engine idle momentarily before powering off so the turbos could cool slightly?
Elysium said:
I think the bigger issue with these cars was to coast in and let the engine idle momentarily before powering off so the turbos could cool slightly?
I live in West London so the general area before I get to my driveway is just 30mph limits. I'm guessing a minute of sitting idle on the driveway is enough to cool the turbos?moebiusuk said:
Elysium said:
I think the bigger issue with these cars was to coast in and let the engine idle momentarily before powering off so the turbos could cool slightly?
I live in West London so the general area before I get to my driveway is just 30mph limits. I'm guessing a minute of sitting idle on the driveway is enough to cool the turbos?
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