Oil

thatblack335 · 09-17-2020, 12:03 AM

Does anyone think that I should run 0w40 in my n54 even if it is parked in a heated shop at night? It would be parked outside in up to -40 C weather during the day. I am currently on 5w40.

Tambohamilton · 09-17-2020, 01:00 AM

It won't be any worse, and sounds like if you left it outside you could really use the lower cold viscosity of a 0w oil...I say go for it.

Vivek. · 09-17-2020, 01:20 AM

Definitely sounds like a good idea to go to 0w40 for those temps. Make sure to warm the engine sufficiently before pushing it, too.

BMW335l · 09-17-2020, 05:51 AM

BMW recommends 5w30/0w30 for the N54 engine. I would probably go for 0w30 if you have a colder climate, and 5w30 if you live in a hot climate year around. I'm no expert in oil but from what I have read 5w30/0w30 is the way to with the n54 engine. In your climate I would definitely go for 0W.

stewbets · 09-17-2020, 10:09 AM

Quote:

Originally Posted by thatblack335

Does anyone think that I should run 0w40 in my n54 even if it is parked in a heated shop at night? It would be parked outside in up to -40 C weather during the day. I am currently on 5w40.

Fun fact: -40 C = -40 F

TheMidnightNarwhal · 09-17-2020, 10:26 AM

Hold on are you actually getting -40c temps or is that with the wind calculation?

Bimmer_Bro · 09-17-2020, 10:31 AM

Quote:

Originally Posted by thatblack335

Does anyone think that I should run 0w40 in my n54 even if it is parked in a heated shop at night? It would be parked outside in up to -40 C weather during the day. I am currently on 5w40.

I'm from Canada and I run 5w40 liqui moly year round. My car is in a garage at night but sits outside all day. Never had an issue starting or anything.

maarzz · 09-18-2020, 12:43 AM

Quote:

Originally Posted by BMW335l

BMW recommends 5w30/0w30 for the N54 engine. I would probably go for 0w30 if you have a colder climate, and 5w30 if you live in a hot climate year around. I'm no expert in oil but from what I have read 5w30/0w30 is the way to with the n54 engine. In your climate I would definitely go for 0W.

I am in Boston, and I have always put 0-40 Castrol in it. First it used to go to the dealership, but now I do it myself and since the local BMW dealership provides free fluid top ups, anytime I have needed a quart, I just drive there and they put it in. They use 0-40 Castrol too. What would be the downside of a thinner oil vis a vis 30 for our N54s? Thx for the info in advance..

relative4 · 09-18-2020, 11:15 AM

The Bentley manual has a chart of recommended viscosities for temperature ranges.

hellokitty · 10-04-2020, 12:02 AM

I'd run 0w-30 during the winter. Use genuine bmw oil

09-17-2020, 12:03 AM	#1
thatblack335 Enlisted Member 8 Rep 30 Posts Drives: BMW 335i Join Date: Sep 2020 Location: Calgary iTrader: (0)	Oil Does anyone think that I should run 0w40 in my n54 even if it is parked in a heated shop at night? It would be parked outside in up to -40 C weather during the day. I am currently on 5w40.
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09-17-2020, 01:00 AM	#2
Tambohamilton Brigadier General 3058 Rep 3,910 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	It won't be any worse, and sounds like if you left it outside you could really use the lower cold viscosity of a 0w oil...I say go for it.
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09-17-2020, 01:20 AM	#3
Vivek. Lieutenant Colonel 1368 Rep 1,532 Posts Drives: 335is coupe, e30 vert Join Date: Aug 2020 Location: Los Gatos, California iTrader: (0)	Definitely sounds like a good idea to go to 0w40 for those temps. Make sure to warm the engine sufficiently before pushing it, too.
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09-17-2020, 05:51 AM	#4
BMW335l Private 10 Rep 54 Posts Drives: M240i, GTI MK5, Corolla TTE Join Date: Sep 2020 Location: Unknown iTrader: (0)	BMW recommends 5w30/0w30 for the N54 engine. I would probably go for 0w30 if you have a colder climate, and 5w30 if you live in a hot climate year around. I'm no expert in oil but from what I have read 5w30/0w30 is the way to with the n54 engine. In your climate I would definitely go for 0W.
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09-17-2020, 10:26 AM	#6
TheMidnightNarwhal Major General 2657 Rep 6,290 Posts Drives: 11' 335is DCT Join Date: Jun 2015 Location: Gatineau, Quebec iTrader: (0)	Hold on are you actually getting -40c temps or is that with the wind calculation?
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09-18-2020, 11:15 AM	#9
relative4 Major 611 Rep 1,272 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	The Bentley manual has a chart of recommended viscosities for temperature ranges.
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10-04-2020, 12:02 AM	#10
hellokitty Brigadier General 2896 Rep 3,726 Posts Drives: '17 M3 ZCP DCT Join Date: Jul 2010 Location: Southern California iTrader: (2)	I'd run 0w-30 during the winter. Use genuine bmw oil __________________ 2017 F80 M3 ZCP / AA GESI DPs / Akrapovic Evo / BBS FI-R 19" / Bend Calibration ECUTEK Flex Fuel \| Bilstein B16 DDC + CS EDC / BMC Filters / BMS OCC / CSF HE / ESS CP / Nitto NT555R2 / PD Crank Hub / SPL Suspension / Uniden R7 / Wagner Top Mount IC 2021 Mini GP3 / BMC Filters / BM3 / Cary Jordan E30 / Wagner IC / Remus Race
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