What is the lowest temp you all would use 20w50

[Malo83]

I'll use 20w50 in my chevy small block during the summer months when triple digit heat rules.

 

[53' Stude]

I used it one winter when we had a couple weeks in low 30’s Fahrenheit here in PA

 

[GSCJR]

43F or 6C

 

[blufeb95]

I'd only use it in Indiana from the last weeks of May until the end of October.

 

[Number_35]

Well, just for fun I checked out the Temperature and Viscosity chart in the owner's manual of my late great 1979 Mazda GLC.

It shows 20W-50 being good down to -10°C (14°F), and good up to 50°C (122°F).

 

[blufeb95]

Well, just for fun I checked out the Temperature and Viscosity chart in the owner's manual of my late great 1979 Mazda GLC.

It shows 20W-50 being good down to -10°C (14°F), and good up to 50°C (122°F).

I guess having such a tiny little engine engine probably makes it pretty easy to start even with molasses in the crankcase.

 

[bluesmokertdi]

about -10C, modern 20w50s have decently low pour points

you could easily use a 20w50 year round in a moderate climate like Metro Vancouver

 

[Dinoburner]

Just scored some Castrol 20/50 Classic at Wally World for the zinc to be used in the 77 454 in my sig. It will be used for cruising and a few hot blasts.

 

[bluesmokertdi]

this is in my ML320 right now

Super Tech 20W50 Conventional Engine Oil, 946 ML - Walmart.ca

Buy Super Tech 20W50 Conventional Engine Oil, 946 ML from Walmart Canada. Shop for more Conventional Motor Oil available online at Walmart.ca

www.walmart.ca

 

[jurko]

Here's viscosity chart I converted from °C to °F

 

[GoToGuy_Ron]

I guess having such a tiny little engine engine probably makes it pretty easy to start even with molasses in the crankcase.

You do know the temp range this covers correct? And what the " W " denotes in "20W50" ?

 

[Zaedock]

Here's viscosity chart I converted from °C to °F

I appreciate the conversion effort but it's a little off. 5W20 is only acceptable to 78*F? Man, my F150 is screwed.

Where did you get the original chart?

 

[Zaedock]

You do know the temp range this covers correct? And what the " W " denotes in "20W50" ?

You've participated in 4 posts here at BITOG. Do you know what it means?
I think you missed the humor in his post.

 

[manicrodder]

You do know the temp range this covers correct? And what the " W " denotes in "20W50" ?

76 Seville I had said 20 F. In manual.

 

[jurko]

I appreciate the conversion effort but it's a little off. 5W20 is only acceptable to 78*F? Man, my F150 is screwed.

Where did you get the original chart?

I don't remember, but I had the original for quite some time which showed °C and about 2-3 months ago I cut out the °C and replaced it with °F using Google Sheet and took screenshot of it with IrfanView. I also thought that the upper range for 0W-20 and 5W-20 was kind of low.
If you find anything better or more accurate I'd like to know.

 

[GoToGuy_Ron]

Ah, humor. I must have missed it. Yeah, four post's under this name.

 

[Zaedock]

I found this on an AMC forum. It was posted by an Australian, which may explain 0/5W20 being omitted.
The conversions are very similar to your chart.
They were discussing 20W50 but ironically, I noticed it's not in the chart. It's getting late...

 

[Number_35]

I guess having such a tiny little engine engine probably makes it pretty easy to start even with molasses in the crankcase.

That car started amazingly in the cold. One night I had to do a cold start at -38 C to help out a friend. I had not planned on driving the car, and it wasn't plugged in. It started fine - the secret was the manual choke.

 

[M56959]

Responding to a nearly 5 year old topic helps no one.

And this was beat to death back then.

Start a new topic if it interests you.