10w-30 wat bout winter?

[69 Riv GS]

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My mom's Impreza had zero problems starting or running last winter when the temperatures were down to 0'F and slightly below overnight. That was using Motorcraft 10w30. No unusual noises or anything.
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Yeah, starting is one thing - but increased wear is another.
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Originally posted by vvk:
Funny you should mention it. I did oil analysis to check that very thing:

Motorcraft 10w30 below zero UOA

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I'm supposed to believe that this oil, under these conditions produced reduced wear rates compared to your other samples that apparently were subjected to more favorable weather conditions?
With all due respect, a typical UOA doesn't prove very much in this situation.IMO
"Scuffing" caused by insufficient lubrication(heavy adhesive wear) is more likely to produce particles in the 50-200 micron range.JMHO

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Originally posted by Dr.T
In either case, I thought that a 10W was SAE certified to pump down to -25C and a 5W down to -30C. Is this not correct?

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Yeah, but that's with fresh oil, how about after there's some miles on it. I doubt it would perform nearly as well.

 

[99 GASE2]

Sorry guys, I guess my alcohol thermometer inside my car (so NO WIND CHILL WAS FACTORED-IN) is not accurate enough; even though it is roughly reading equal to my digital chemistry thermometer that reads in .1C increments.

Nice way to

a newbie.

I said it was AROUND -30C; the thermometer in my car was reading around -27/-28C that morning inside my car.
Which is parked right beside the house which bleeds-off some heat to the passenger side of the car.
My dad's car is in the back yard in the open.
His car did start very slowly in the low -20C range in the mornings before though.

I have seen differences of up to 8C from where I live compared to other parts of Toronto.
I don't live in downtown Toronto where it is warmer (but work there).

So what ever.

I just glad that last year's winter was an abnormal occurrence; coldest in 10 or 20-years some people are saying for the eastern seaboard side of North America.


By the way, I understand that windchill is not suppose to effect the air temperature; but why does my digital thermometer effected alittle by the wind blowing on it.

[ October 15, 2004, 08:46 PM: Message edited by: 99 GASE2 ]

 

[Dr. T]

I'm in Toronto and last winter I ran both Mobil 1 15W-50 and Castrol TWS 10-60. It got down to -23C and the car started fine. Something else is wrong if you can't start with 10-30 in Toronto winters. PS. Windchill number does not count as the ambient temp.

This winter I'm running Syntec 5-50.

 

[haley10]

99, I live just a few miles from where our "official" temperature is taken. The weather station is near the river at the water treatment facility. This skews the results because, I am usually a few degrees F warmer, due to being inside the city.

Welcome.

I like GTX, just bought some, but it was never meant to shine for it cold weather properties.

Thanks for sharing a "real" experience. Bottom line is if it didn't crank, how good was it doing if the temp rose just slightly enough to let it crank?

[ October 16, 2004, 01:21 PM: Message edited by: haley10 ]