official SAE viscosity specs, 5w20 vs 10w30 vs 20w50

11-11-2008, 08:43 AM

#1

arghx7

Registered

Thread Starter

Join Date: Apr 2005

Posts: 654

Likes: 0

Received 4 Likes on 4 Posts

official SAE viscosity specs, 5w20 vs 10w30 vs 20w50

i think i'm going to stick with the 20w50, at least given the climate of my area (southeast). and yes I know that the stuff I have highlighted are not the only important statistics on this chart.

Attached Thumbnails

official SAE viscosity specs, 5w20 vs 10w30 vs 20w50-oil_viscosity.jpg

Reply Like

11-11-2008, 09:01 AM

#2

newguy

zoom fuckin zoom

Join Date: Sep 2008

Location: PA, USA

Posts: 386

Likes: 0

Received 0 Likes on 0 Posts

ive been using 5w30 but may use 5w40 now. besides when Johnny Tran asked for advice Lance went 40w

Reply Like

11-11-2008, 09:26 AM

#3

mysql

Doppelgänger

Join Date: Feb 2008

Location: Florida

Posts: 3,192

Likes: 0

Received 1 Like on 1 Post

I'm using 10w40 right now.

Reply Like

11-11-2008, 09:28 AM

#4

nycgps

Out of NYC

iTrader: (1)

Join Date: Jun 2005

Location: Planet Earth

Posts: 19,881

Likes: 4

Received 32 Likes on 30 Posts

Havent keep up with SAE spec lately, ahh good read.

I know 10w40 will work for NYC. Ahh,

Reply Like

11-11-2008, 12:00 PM

#5

Icemark

Registered User

Join Date: Sep 2004

Location: Rohnert Park CA

Posts: 755

Likes: 0

Received 0 Likes on 0 Posts

Interesting that just moving from a 5W20 to a 5W30 comes close to almost doubling the shear stability.

And the difference between a 10W and a 20W is only 10 degreesC (or about -18F colder) on low temp pumping viscosity.