15w40

Puerto Rican 335d · 03-17-2017, 07:34 AM

Ok amigos long time I dont post. Here is my question for you guys, Can we use 15w40 oil on our cars? Let the games begin. Gracias

Ken Oath · 03-17-2017, 11:24 AM

The 15W oil kinematic viscosity is too high for cold start.

BMW LL-O4 has a 0W or 5W recommendation.

Interested to know where you obtained the information about using 15W?

Puerto Rican 335d · 03-17-2017, 07:12 PM

Thats what they had here in Dominican republic from the oil brand i used in Puerto Rico had to use one quart cause i was low

335dFan · 03-17-2017, 09:28 PM

Quote:

Originally Posted by Puerto Rican 335d

Thats what they had here in Dominican republic from the oil brand i used in Puerto Rico had to use one quart cause i was low

I don't have an answer, amigo, but can tell you a story about my old '71 2002. Toward the end of its lifetime with me, at around 90k miles when I was stationed in Germany, I ran 40W Quaker State Racing Oil and a can of STP to keep the oil pressure up high enough. But it had been abused (unintentionally) by my ex when we swapped cars one long weekend and she didn't notice the oil level was way down.

blowinsmoke · 03-17-2017, 09:31 PM

I personally think it will be fine. Any oil is better than no oil.

lnxguy · 03-18-2017, 11:23 AM

Cold starts in Puerto Rico? Lol. 15w40 will be fine.

Ken Oath · 03-18-2017, 11:32 AM

Quote:

Originally Posted by lnxguy

Cold starts in Puerto Rico? Lol. 15w40 will be fine.

It has nothing to do with ambient temperature.

335dsleeper · 03-18-2017, 12:18 PM

Quote:

Originally Posted by Ken Oath

It has nothing to do with ambient temperature.

What?

glitdi · 03-18-2017, 01:04 PM

If you are low on oil and have no choice...Yes!
However, mixing types of oils and weights is bad practice....Period!
I see this a lot in my business all the time... "I want to run thicker oil to help prevent wear, etc..." Or what ever idea they have in there head at the time.
3 points...
1)Running thicker oil does not allow the same sort of protection on bearing surfaces that oem specifications does. This isnt some sloppy v8 from the 80's etc..
Number one chance of wear in an engine is on engine start up, thicker oil more time to hit the bearings etc, I see oil sample results all the time with my business, including these engines. If you are going to modify oil specifications it should be done with an oil sample analysis during changes... Best way to monitor how the oil is treating your engine. .. Pouring some oil in you heard might work well is like driving around aimlessly trying to find a destination. You need a map!!
....The science does not back up the claims most "experts" and I use that term lightly propose it will.
2) When an oem design the engine they give the engine oil manufacturers a list of things they want...
Durability, wear life, protection parameters, low ash content etc.. Then its up to the oil manufacturers to produce an oil that meets all those parameters. 15/w40 pretty much without a doubt will not match bmw oem spec....Just saying!
3) OIL IS CHEAP!!!!!! WHATS NOT CHEAP????? ENGINES!!!!!!

That is all

lnxguy · 03-18-2017, 01:42 PM

Quote:

Originally Posted by Ken Oath

It has nothing to do with ambient temperature.

Enlighten us please.

Whitbread · 03-18-2017, 03:41 PM

Many M gas bmw's spec 10w-60 which has a cst of around 160-175 @ 40°C depending on brand. Redline's 5w-40 and 15w-40 diesel oils have the same cst of 97 @ 40°C. Hard to say a certain oil is junk without data in the discussion.

Built4Sin · 03-18-2017, 05:15 PM

03-17-2017, 07:34 AM	#1
Puerto Rican 335d Brigadier General 236 Rep 3,488 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) iTrader: (0)	15w40 Ok amigos long time I dont post. Here is my question for you guys, Can we use 15w40 oil on our cars? Let the games begin. Gracias __________________ RENNtech Flash(Lenny Wu)/WAGNER IC Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now)
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03-17-2017, 11:24 AM	#2
Ken Oath Lieutenant 114 Rep 410 Posts Drives: 2012 E92 330d Join Date: Feb 2017 Location: Perth, Australia iTrader: (0)	The 15W oil kinematic viscosity is too high for cold start. BMW LL-O4 has a 0W or 5W recommendation. Interested to know where you obtained the information about using 15W?
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03-17-2017, 07:12 PM	#3
Puerto Rican 335d Brigadier General 236 Rep 3,488 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) iTrader: (0)	Thats what they had here in Dominican republic from the oil brand i used in Puerto Rico had to use one quart cause i was low __________________ RENNtech Flash(Lenny Wu)/WAGNER IC Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now)
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03-17-2017, 09:31 PM	#5
blowinsmoke Private 13 Rep 73 Posts Drives: 335d Join Date: Dec 2014 Location: indiana iTrader: (0)	I personally think it will be fine. Any oil is better than no oil.
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03-18-2017, 11:23 AM	#6
lnxguy Colonel 629 Rep 2,286 Posts Drives: 2018 540i xDrive. Join Date: Jun 2016 Location: Barrie iTrader: (1)	Cold starts in Puerto Rico? Lol. 15w40 will be fine.
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03-18-2017, 01:04 PM	#9
glitdi Rudolf/German/Compression Ignition Specialist. 58 Rep 168 Posts Drives: 2009 335d Join Date: Oct 2014 Location: West Coast Canada iTrader: (0)	If you are low on oil and have no choice...Yes! However, mixing types of oils and weights is bad practice....Period! I see this a lot in my business all the time... "I want to run thicker oil to help prevent wear, etc..." Or what ever idea they have in there head at the time. 3 points... 1)Running thicker oil does not allow the same sort of protection on bearing surfaces that oem specifications does. This isnt some sloppy v8 from the 80's etc.. Number one chance of wear in an engine is on engine start up, thicker oil more time to hit the bearings etc, I see oil sample results all the time with my business, including these engines. If you are going to modify oil specifications it should be done with an oil sample analysis during changes... Best way to monitor how the oil is treating your engine. .. Pouring some oil in you heard might work well is like driving around aimlessly trying to find a destination. You need a map!! ....The science does not back up the claims most "experts" and I use that term lightly propose it will. 2) When an oem design the engine they give the engine oil manufacturers a list of things they want... Durability, wear life, protection parameters, low ash content etc.. Then its up to the oil manufacturers to produce an oil that meets all those parameters. 15/w40 pretty much without a doubt will not match bmw oem spec....Just saying! 3) OIL IS CHEAP!!!!!! WHATS NOT CHEAP????? ENGINES!!!!!! That is all __________________ I fix other people's stupid German problems so I can afford to fix my stupid German problems....
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03-18-2017, 03:41 PM	#11
Whitbread Banned 144 Rep 315 Posts Drives: 335D Join Date: Jun 2015 Location: Gaylord, MI iTrader: (0)	Many M gas bmw's spec 10w-60 which has a cst of around 160-175 @ 40°C depending on brand. Redline's 5w-40 and 15w-40 diesel oils have the same cst of 97 @ 40°C. Hard to say a certain oil is junk without data in the discussion.
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03-18-2017, 05:15 PM	#12
Built4Sin TL/DR 100 Rep 237 Posts Drives: 2009 335d Sport Join Date: Oct 2012 Location: Arizona iTrader: (0) Garage List 2009 BMW 335D [9.50] 2014 Audi Q7 TDI [10.00]
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