02-11-2019, 03:15 PM | #91 |
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I let my E90 warm up for about 2-5 minutes. A little bit longer because it's been hitting under 40 degrees Fahrenheit here in San Diego at night. (I know, so cold brrrrrrr)
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02-14-2019, 10:50 AM | #92 |
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I wait until the engine comes off high idle before driving, and keep the revs low for the first few miles.
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02-14-2019, 05:17 PM | #93 |
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I just start and drive about 20 sec. That about the time I put my phone on its mount and buckle my seatbelt. And then again 20 sec plenty of time to get the oil circulate.
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02-14-2019, 05:41 PM | #95 | |
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Then while going light on the throttle I usually shift under 2500 RPMs for a couple miles and then keep it under 3k RPMs until the engine reaches operating temp. All I know is what I do wont hurt the car, but driving hard after cold start certainly could.
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02-14-2019, 06:10 PM | #96 |
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I don't warm it up really, but I do take my time to leave from my spot, e.g. look at the gauges, look around my surroundings, wait for garage door to close, check my rear view mirror, etc. before actually leaving. So with all this, this is pretty much my warm up time.
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02-14-2019, 07:25 PM | #97 |
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Warming up the car is a practice that is not current anymore with all fuel injection vehicles. In fact letting the car warm up in idle for the car means that the "normal" functional temperature will take longer to be reached, and the car will have to compensate that by injecting additional fuel into the combustion mixture and we can say that that is "not beneficial".
a few seconds or a minute or 2 is more than enough to make the oil engine moving, after that driving smoothly until it reaches the "normal" operating temperature is the best practice for the sake of the motor |
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02-15-2019, 03:49 PM | #98 |
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No need to idle for minutes on end. You want oil pumped back to the top of the engine which occurs in the first few seconds of running, then take it easy on the gas until there's temp in the coolant AND in the oil.
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02-16-2019, 04:32 PM | #99 |
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the duration of warming up depends on the temperatures for me but i believe waiting a little is good for every engine.. in hot summer days a 50-60secs will be enough.. in really cold ukraine winter i do wait 2mins at least.. and in super cold winter days i never turn off the engine when its super hot.. like pushing it for a while before reaching the destination.. i believe its not good also.. driving calmly in last 3-4 mins before i arrive..
if more than 12 hours past i do wait at least rev goes down.. for my current ride i press M button and wait till exhaust flaps open on its own.. then i go.. driving progressively higher revs till oil reaches optimal levels.. below -10c things are not like that cause viscosity changes also.. thicker oil cant reach every part of the engine %100 for a while.. actually cold start behaviors is affecting a lot for engine's lifespan.. not even talking about turbos.. |
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02-17-2019, 09:19 AM | #100 | |
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My garage drops to about 50* when its in the teens F* outside, so it has to get pretty darn cold to drop the temp in my garage to the mid 40s. That's only happened once or twice and both times it was below zero F outside If you're car is constantly in temps that are well below freezing you may need to let it idle for a short period but no need for a 10 minute idle session.
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02-17-2019, 05:12 PM | #101 |
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It's called multi-viscosity oil for a reason...
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A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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02-21-2019, 10:00 AM | #103 |
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I wait 15 seconds and drive.
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02-21-2019, 08:16 PM | #104 | |
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02-21-2019, 08:18 PM | #105 | ||||
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Quote:
Quote:
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02-21-2019, 08:23 PM | #106 |
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02-28-2019, 10:41 AM | #107 |
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I don't let it warm up... but that being said, I live in FL and coldest it gets is in the 30s... mostly 70-90f weather.
My corvette shows me an alternative redline until engine warms up. Pretty sure some other BMWs have this. I go by that. |
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02-28-2019, 12:55 PM | #108 | |
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BMW M cars have a variable red line which increases as the engine warms up. However, even the reduced red line its still far too high to rev on a cold engine. I always keep it below 3k rpm until the oil temp needle has come off its resting position. |
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02-28-2019, 02:11 PM | #109 | |
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I wonder if car's shift points change to upshift more when engine is cold? Also what is the running temp for our cars generally? US cards are 190-210.... I noticed this X5 runs around 230. |
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02-28-2019, 02:23 PM | #110 |
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My car is a manual so I control the shift points, but I dont think the autos take engine temp into consideration. As long as you are not in D3/sport+/performance driving modes and accelerate mildly the transmission will likely never shift above 3k rpm.
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