Switching from 5w30 to 5w40

AviatorBimmerFL · 10-18-2017, 10:40 AM

Hey guys,

I live in Florida and I was wondering if it would be better for my car (currently at 162K miles and FBO) to use 5w40 instead of 5w30.

For the past couple of years, I have used LiquiMoly 5w30 exclusively and of course, if recommended, then I would go with LiquiMoly 5w40.

Thanks for any advice.

335e92tx · 10-18-2017, 12:05 PM

BMWs arnt known for their forgiveness to viscosity issues.. The 4liter m3 motor has had multiple issues both the 20-50 recommeded and also lower weights that people have tried. What is the max oil temp you experience? I would only go a 40 weight if you consistently see over 245 degree oil temps.

Otherwise maybe try half and half..

Jeff@TopGearSolutions · 10-18-2017, 12:07 PM

I run Motul Xcess 5W-40 and I'm in the North East. For someone in hotter climates, I definitely recommend going to a 40W.

AviatorBimmerFL · 10-18-2017, 12:27 PM

Quote:

Originally Posted by 335e92tx

BMWs arnt known for their forgiveness to viscosity issues.. The 4liter m3 motor has had multiple issues both the 20-50 recommeded and also lower weights that people have tried. What is the max oil temp you experience? I would only go a 40 weight if you consistently see over 245 degree oil temps.

Otherwise maybe try half and half..

Yea, I consistently see 230-240+ temps during the day. 250ish during spirited driving.

My car also does NOT have an oil cooler.

mfractal · 10-18-2017, 12:31 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

I run Motul Xcess 5W-40 and I'm in the North East. For someone in hotter climates, I definitely recommend going to a 40W.

+1. Can't go wrong with Motul X-Cess 8100 5W-40. Especially in hot climates.

BaaQaf · 10-18-2017, 12:44 PM

1) living in Florida you dont need the oil thermostat. so get an oil Thermostat delete and let that thang flow, yo

2) increase water pump speed in MHD to sport would be a good move also

AviatorBimmerFL · 10-18-2017, 12:50 PM

Quote:

Originally Posted by BaaQaf

1) living in Florida you dont need the oil thermostat. so get an oil Thermostat delete and let that thang flow, yo

2) increase water pump speed in MHD to sport would be a good move also

Oil thermostat delete? Are you serious? I've never heard of that. Lol

mfractal · 10-18-2017, 12:55 PM

Quote:

Originally Posted by BaaQaf

1) living in Florida you dont need the oil thermostat. so get an oil Thermostat delete and let that thang flow, yo

10-18-2017, 01:14 PM

Quote:

Originally Posted by AviatorBimmerFL

Oil thermostat delete? Are you serious? I've never heard of that. Lol

That's because you don't have an oil cooler.

jwebb335xi · 10-18-2017, 01:23 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

I run Motul Xcess 5W-40 and I'm in the North East. For someone in hotter climates, I definitely recommend going to a 40W.

I had been using 5W30 in my tuned. 335xi and recently switched to Motul xcess 5w40. I haven't seen much difference between the two here in Chicago-maybe a couple degrees cooler in "normal" driving. If I lived in FL, I'd be using a 5w40, particularly if tuned..

I've done UOA on my last two changes and will on the next as well. Comparing Redline to Motul.

Jeff@TopGearSolutions · 10-18-2017, 01:49 PM

Quote:

Originally Posted by AviatorBimmerFL

Yea, I consistently see 230-240+ temps during the day. 250ish during spirited driving.

My car also does NOT have an oil cooler.

~238 is normal operating temp. The 40W should help a little on keeping the temps down or at least slowing down how fast they warm up.

Quote:

Originally Posted by mfractal

+1. Can't go wrong with Motul X-Cess 8100 5W-40. Especially in hot climates.

+1

Quote:

Originally Posted by jwebb335xi

I had been using 5W30 in my tuned. 335xi and recently switched to Motul xcess 5w40. I haven't seen much difference between the two here in Chicago-maybe a couple degrees cooler in "normal" driving. If I lived in FL, I'd be using a 5w40, particularly if tuned..

I've done UOA on my last two changes and will on the next as well. Comparing Redline to Motul.

Looking forward to that Oil Analysis. It helped a little on my car going to 40W and I have no oil cooler (yet) on my 335xi.

jwebb335xi · 10-18-2017, 08:34 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

Quote:

Originally Posted by AviatorBimmerFL

Yea, I consistently see 230-240+ temps during the day. 250ish during spirited driving.

My car also does NOT have an oil cooler.

~238 is normal operating temp. The 40W should help a little on keeping the temps down or at least slowing down how fast they warm up.

Quote:

Originally Posted by mfractal

+1. Can't go wrong with Motul X-Cess 8100 5W-40. Especially in hot climates.

+1

Quote:

Originally Posted by jwebb335xi

I had been using 5W30 in my tuned. 335xi and recently switched to Motul xcess 5w40. I haven't seen much difference between the two here in Chicago-maybe a couple degrees cooler in "normal" driving. If I lived in FL, I'd be using a 5w40, particularly if tuned..

I've done UOA on my last two changes and will on the next as well. Comparing Redline to Motul.

Looking forward to that Oil Analysis. It helped a little on my car going to 40W and I have no oil cooler (yet) on my 335xi.

I did posts on my last two- one with Total Quartz 5w30 and one with Redline 5w30.

I'll definitely report back in another 1-2k miles.

Boland01 · 10-19-2017, 08:43 AM

On our tuned 2007 335i I starting using Castrol 5W-40. Things do get hot here in Houston too.

BeastMode335i · 10-19-2017, 08:56 AM

Rotella T6 5w-40 here, no issues..

AviatorBimmerFL · 10-19-2017, 09:04 AM

Thanks for the replies, guys! I ordered LiquiMoly 5w40 and will make the switch as soon as it arrives. =)

10-18-2017, 10:40 AM	#1
AviatorBimmerFL Second Lieutenant 55 Rep 266 Posts Drives: 2007 BMW 335i E92 Join Date: Jul 2016 Location: Orlando, FL iTrader: (2)	Switching from 5w30 to 5w40 Hey guys, I live in Florida and I was wondering if it would be better for my car (currently at 162K miles and FBO) to use 5w40 instead of 5w30. For the past couple of years, I have used LiquiMoly 5w30 exclusively and of course, if recommended, then I would go with LiquiMoly 5w40. Thanks for any advice.
	Appreciate 0 Tweet Quote

10-18-2017, 12:05 PM	#2
335e92tx ahat 1036 Rep 2,592 Posts Drives: Was '07-335e92 - Now '13-335IS Join Date: Mar 2008 Location: Texas iTrader: (6)	BMWs arnt known for their forgiveness to viscosity issues.. The 4liter m3 motor has had multiple issues both the 20-50 recommeded and also lower weights that people have tried. What is the max oil temp you experience? I would only go a 40 weight if you consistently see over 245 degree oil temps. Otherwise maybe try half and half.. __________________ '13 335IS N54 (1 of 373 LeMans Blue out of 3597 total production e92)- Grey interior (1 of 24 in LMB with any trans- 1 of 14 with DCT)-MODS -MFactory LSD/MHD-BQ custom Tune/ATM-IC/AFE Momentum GT Intake/Konis/Mfront&HeimJoint Rear rods&arms/Brembos. https://photos.app.goo.gl/Lo6aHZRo7XqtPkhL8
	Appreciate 0 Quote

10-18-2017, 12:07 PM	#3
Jeff@TopGearSolutions 3441 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	I run Motul Xcess 5W-40 and I'm in the North East. For someone in hotter climates, I definitely recommend going to a 40W.
	Appreciate 2 mfractal39.50 Chris@VargasTurboTech1933.00 Quote

10-18-2017, 12:44 PM	#6
BaaQaf Lieutenant 253 Rep 410 Posts Drives: 2012 E89 Z4 35i M Sport Join Date: Jun 2017 Location: ((((((( BQ ))))))) iTrader: (0)	1) living in Florida you dont need the oil thermostat. so get an oil Thermostat delete and let that thang flow, yo 2) increase water pump speed in MHD to sport would be a good move also
	Appreciate 1 feuer4275.50 Quote

10-19-2017, 08:43 AM	#13
Boland01 Lieutenant 149 Rep 460 Posts Drives: 2010 535ix, 2008, 2007 335i Join Date: Sep 2013 Location: Magnolia, TX iTrader: (0)	On our tuned 2007 335i I starting using Castrol 5W-40. Things do get hot here in Houston too.
	Appreciate 0 Quote

10-19-2017, 08:56 AM	#14
BeastMode335i Maximus Decimus Meridius 1130 Rep 4,584 Posts Drives: F30 335i Join Date: Apr 2014 Location: Down South iTrader: (2)	Rotella T6 5w-40 here, no issues.. __________________ F30 335i Melbourne Red Metallic M-Sport Package
	Appreciate 0 Quote

10-19-2017, 09:04 AM	#15
AviatorBimmerFL Second Lieutenant 55 Rep 266 Posts Drives: 2007 BMW 335i E92 Join Date: Jul 2016 Location: Orlando, FL iTrader: (2)	Thanks for the replies, guys! I ordered LiquiMoly 5w40 and will make the switch as soon as it arrives. =)
	Appreciate 0 Quote