15W-40 HDEO

[toyota62]

Hi.
Has Any one here ever used 15w40 grade Engine oil in minus temperatures? What was the ambient temperature?

 

[stenerson]

I've used 15w50 in minus 30F for 8 years with no problems.

 

[Bluestream]

Originally Posted By: stenerson
I've used 15w50 in minus 30F for 8 years with no problems.


Ahh, a 50 weight in winter; that's got to hurt the fuel economy...

 

[lipadj46]

People with diesels do it all the time but they have block heaters. I would definitely in the least use an oil pan heater. Better to use Rotella 5w-40 or Mobil 1 5w-40 TDT.

 

[jorton]

Originally Posted By: stenerson
I've used 15w50 in minus 30F for 8 years with no problems.


Testament to running synthetic in northern climate.

 

[roadrunner1]

don't know your app but we have used 15w40 down to -20f with a block heater. my 15w40 has a cold pour point of 4f, there are alot of options depending on engine specs, generally lighter is better in cold temps, just go by owners manual specs

 

[mechtech2]

Many years ago, I used to use 20-50 and even straight 40 through Chicago winters.
Somehow I always got started [but I keep my vehicles in very good shape].
I could also say there were no problems, but that is simply not true.
A thinner and more appropriate oil would have given me faster starts, better flow for cold lubrication, better power, and gas economy.

 

[toyota62]

Originally Posted By: stenerson
I've used 15w50 in minus 30F for 8 years with no problems.


With out block heater?

 

[sparkplug]

I run it until about the mid teens then I use a 5w40.

 

[toyota62]

here in sydney winter is not that cold,The Lowest i have seen -1c'.I think 15w40 is good enough till -15c'

 

[toyota62]

http://www.aa1car.com/library/oil_chart.jpg

http://www.tuninglinx.com/assets/images/img_oil_climate.png

 

[toyota62]

http://mysite.verizon.net/oldhokie/windyridge/oil.pdf

 

[Audi Junkie]

Minus celcius?

Down to +20f is what I'd say ok to.

I shoot for about 2000cSt

http://www.widman.biz/Seleccion/Viscosidad/Conversiones/Graph/graph.html

 

[Audi Junkie]

Originally Posted By: stenerson
I've used 15w50 in minus 30F for 8 years with no problems.



Why?

http://www.widman.biz/Seleccion/Viscosidad/Conversiones/Graph/graph.html

 

[CharBaby]

My BIL always uses 15W40 in all of his Buick/Olds 3.8L
It get cold here along Lake Ontario.

 

[Rand]

15w50 is a SYN and has a lower pour point than 15w40 which is usually a group II or II+

I wouldnt feel bad running it at 15-20F but If it was a daily driver I would go for a 10wXX or lower.

 

[toyota62]

if it is ok down to 15-20F -9.44c' to -6.67c'i don't see that cold at all in my area.

 

[vxcalais]

Originally Posted By: toyota62
http://www.aa1car.com/library/oil_chart.jpg

http://www.tuninglinx.com/assets/images/img_oil_climate.png


How many on here would pay attention to the hot chart, still using thin oils in hot weather.

 

[stenerson]

Originally Posted By: toyota62
Originally Posted By: stenerson
I've used 15w50 in minus 30F for 8 years with no problems.


With out block heater?


Yep. 2000 Dodge Caravan. This on advice of a mechanic friend. But I now know from lurking here that there are better choices.