The Ford Barn

slug · 09-18-2023, 11:21 AM

I am assuming that since all you can get now is GL-5 is OK. It supercedes GL-4 in still the 85-140 weight. This is for my 1939 trans and rear gear. Anyone care to enlighten me. Thanks.

Zeke3 · 09-18-2023, 12:04 PM

You know what they say about assuming? I would not use a GL5 oil in a synchromesh transmission unless the manufacturer guaranteed it was compatible with yellow metals.

slug · 09-18-2023, 12:10 PM

That's what Im trying to figure out. NAPA says that's all that's available from StaLube (the gl5)

Zeke3 · 09-18-2023, 12:17 PM

Look on Amazon, they still show Stalube GL-4. O’Reilly’s and other suppliers can provide GL-4 products. I looked on CRC’s website and could find no mention of yellow metal compatibility. Send them the question about your application.

Fritz · 09-18-2023, 12:55 PM

Do not use GL-5. It’s safe to say instead since our cars are not as common anymore, we can no longer find stuff on-the-shelf. Order GL-4 if you have to. NAPA and Advance Auto Parts have it.

glennpm · 09-18-2023, 12:57 PM

Sponsored Links (Register now to hide all advertisements)

Use GL4!

https://www.fordbarn.com/forum/showp...31&postcount=6

From Amazon too: https://www.amazon.com/Sta-Lube-SL24.../dp/B000M8IHI2

slug · 09-18-2023, 12:58 PM

NAPA seems to have StaLube in 140 GL4 Not 85-140 is what I was looking for in the GL4

Fritz · 09-18-2023, 12:58 PM

Show this to NAPA. Part number SL SL24239. Although a few months ago it was more like $45.

https://www.napaonline.com/en/p/SL_SL24239

glennpm · 09-18-2023, 01:09 PM

140 weight is okay for warm weather. The 140 doesn't shift properly in cool weather in my 39 transmission. I found that the 85W-90 is good year round.

Glenn

slug · 09-18-2023, 01:44 PM

Interesting. CRC teck line got back to me and said their (StaLube) 85-140 GL5 are safe for yellow metals.

slug · 09-18-2023, 02:48 PM

I'm going with the 140 StaLube GR4. Won't be driven when it's cold anyway. Thanks for all the help. You guys always come though.

mcgarrett · 09-18-2023, 03:35 PM

O'Reilly has 65-140 GL4, or at least they did have. I bought a gallon for my Model A several months back. Ask them...

glennpm · 09-18-2023, 03:48 PM

Interesting thread below. I come away still believing that you should avoid GL-5

https://bobistheoilguy.com/forums/th...vs-gl-5.37720/

Gene1949 · 09-18-2023, 06:17 PM

I used GL-5 85-90 in the Camaro Muncie. Never felt right. Bought the StaLube Gl-4 and world of difference. As soon as I winter service the '49 I'll be changing the T-10 to StaLube GL-4

09-18-2023, 11:21 AM	#1
slug Senior Member Join Date: Dec 2010 Location: Granville ohio Posts: 174	Sta Lube Gear Oil I am assuming that since all you can get now is GL-5 is OK. It supercedes GL-4 in still the 85-140 weight. This is for my 1939 trans and rear gear. Anyone care to enlighten me. Thanks.

09-18-2023, 12:04 PM	#2
Zeke3 Senior Member Join Date: Dec 2014 Location: Columbus, IN Posts: 1,407	Re: Sta Lube Gear Oil You know what they say about assuming? I would not use a GL5 oil in a synchromesh transmission unless the manufacturer guaranteed it was compatible with yellow metals.

09-18-2023, 12:10 PM	#3
slug Senior Member Join Date: Dec 2010 Location: Granville ohio Posts: 174	Re: Sta Lube Gear Oil That's what Im trying to figure out. NAPA says that's all that's available from StaLube (the gl5)

09-18-2023, 12:17 PM	#4
Zeke3 Senior Member Join Date: Dec 2014 Location: Columbus, IN Posts: 1,407	Re: Sta Lube Gear Oil Look on Amazon, they still show Stalube GL-4. O’Reilly’s and other suppliers can provide GL-4 products. I looked on CRC’s website and could find no mention of yellow metal compatibility. Send them the question about your application.

09-18-2023, 12:55 PM	#5
Fritz Senior Member Join Date: May 2010 Location: From Chicago. Now Nashville Posts: 207	Re: Sta Lube Gear Oil Do not use GL-5. It’s safe to say instead since our cars are not as common anymore, we can no longer find stuff on-the-shelf. Order GL-4 if you have to. NAPA and Advance Auto Parts have it. __________________ Cars and metal rust away and are destroyed, but the Word of God will stand forever (Isaiah 40:8, Matthew 24:35).

09-18-2023, 12:57 PM	#6
glennpm Senior Member Join Date: Sep 2014 Location: Wiscasset, Maine Posts: 1,981	Re: Sta Lube Gear Oil Sponsored Links (Register now to hide all advertisements) Use GL4! https://www.fordbarn.com/forum/showp...31&postcount=6 From Amazon too: https://www.amazon.com/Sta-Lube-SL24.../dp/B000M8IHI2

09-18-2023, 12:58 PM	#7
slug Senior Member Join Date: Dec 2010 Location: Granville ohio Posts: 174	Re: Sta Lube Gear Oil NAPA seems to have StaLube in 140 GL4 Not 85-140 is what I was looking for in the GL4

09-18-2023, 12:58 PM	#8
Fritz Senior Member Join Date: May 2010 Location: From Chicago. Now Nashville Posts: 207	Re: Sta Lube Gear Oil Show this to NAPA. Part number SL SL24239. Although a few months ago it was more like $45. https://www.napaonline.com/en/p/SL_SL24239 __________________ Cars and metal rust away and are destroyed, but the Word of God will stand forever (Isaiah 40:8, Matthew 24:35).

09-18-2023, 01:09 PM	#9
glennpm Senior Member Join Date: Sep 2014 Location: Wiscasset, Maine Posts: 1,981	Re: Sta Lube Gear Oil 140 weight is okay for warm weather. The 140 doesn't shift properly in cool weather in my 39 transmission. I found that the 85W-90 is good year round. Glenn Last edited by glennpm; 09-19-2023 at 06:16 AM.

09-18-2023, 01:44 PM	#10
slug Senior Member Join Date: Dec 2010 Location: Granville ohio Posts: 174	Re: Sta Lube Gear Oil Interesting. CRC teck line got back to me and said their (StaLube) 85-140 GL5 are safe for yellow metals.

09-18-2023, 02:48 PM	#11
slug Senior Member Join Date: Dec 2010 Location: Granville ohio Posts: 174	Re: Sta Lube Gear Oil I'm going with the 140 StaLube GR4. Won't be driven when it's cold anyway. Thanks for all the help. You guys always come though.

09-18-2023, 03:35 PM	#12
mcgarrett Senior Member Join Date: Dec 2013 Location: Waxahachie, Texas Posts: 949	Re: Sta Lube Gear Oil O'Reilly has 65-140 GL4, or at least they did have. I bought a gallon for my Model A several months back. Ask them...

09-18-2023, 03:48 PM	#13
glennpm Senior Member Join Date: Sep 2014 Location: Wiscasset, Maine Posts: 1,981	Re: Sta Lube Gear Oil Interesting thread below. I come away still believing that you should avoid GL-5 https://bobistheoilguy.com/forums/th...vs-gl-5.37720/

09-18-2023, 06:17 PM	#14
Gene1949 Senior Member Join Date: Jun 2016 Location: Pahrump, NV Posts: 374	Re: Sta Lube Gear Oil I used GL-5 85-90 in the Camaro Muncie. Never felt right. Bought the StaLube Gl-4 and world of difference. As soon as I winter service the '49 I'll be changing the T-10 to StaLube GL-4