GL-5 or GL-4

Bluewasp · Post by **Bluewasp** » Sun Aug 31, 2003 12:48 am

Can I use GL-5 in the locking rear (RPO G80). The other thread mentions GL-4 but I can only find GL-5 80w-90...

thanks

Robert

quickbiker · Post by **quickbiker** » Sun Aug 31, 2003 5:36 am

Bluewasp wrote:Can I use GL-5 in the locking rear (RPO G80). The other thread mentions GL-4 but I can only find GL-5 80w-90...

thanks

Robert

As long as it's slipery!

a2b · Post by **a2b** » Sun Aug 31, 2003 7:58 am

i thought the gl4 was for open diffs

quickbiker · Post by **quickbiker** » Sun Aug 31, 2003 9:21 am

Yea, I think 5 is what ya want. 5 is good for everything.

Bluewasp · Post by **Bluewasp** » Sun Aug 31, 2003 10:54 am

quickbiker wrote:
Bluewasp wrote:Can I use GL-5 in the locking rear (RPO G80). The other thread mentions GL-4 but I can only find GL-5 80w-90...

thanks

Robert

As long as it's slipery!

the bottle says no additive required... Can I run it without the GM additive?

Post by **HenryJ** » Sun Aug 31, 2003 11:52 am

Helms manual - Lubricants for rear axle :

With RPO G80 1052271 only

Without RPO G80 (open diff) 1052271 or SAE 80W-90 GL5

GM Vehicle care Axle Lubricant SAE 80W-90

*excellent axle durability

1#1052271

Gr.8.800

23 fl.oz.

"Gm axle lubricant exceeds API GL-4 requirements and has been formulated specifically for use in certian GM axles as specified. Not all products labeled GL-4 will provide satisfactory service.

*excellent axle durability

*Compatible with limited slip fiction modifiers

*Compatable with seals/elastomers"

Contains : Petroleum oil (gear oil) - CAS 64742-65-0

I don't have a good answer. I'm using this ^

MikeyZR5 · Post by **MikeyZR5** » Wed Sep 03, 2003 6:27 am

About how many bottles do you use?

Post by **HenryJ** » Wed Sep 03, 2003 1:13 pm

MikeyZR5 wrote:About how many bottles do you use?

Rear axle = 1.7L or 1.8 qt

The bottles from GM (part#1052271) are 23 oz. or .680L

So you will need 2.5 bottles.

They find their ways to get you

You have to buy three bottles instead of two, and only use 1/2 of the third bottle

If you find a good price, buy five bottles and you're good for the next change

MikeyZR5 · Post by **MikeyZR5** » Wed Sep 10, 2003 6:55 am

Is there any other fluids that we can use instead of the GM one. Like a Synthetic..?

quickbiker · Post by **quickbiker** » Wed Sep 10, 2003 7:33 am

What's the big craze with synthetic these days? When I did the craze years ago, that stuff gave me nothing but troubles. So now I just stick with the blue light special stuff, all problems gone.

MikeyZR5 · Post by **MikeyZR5** » Wed Sep 10, 2003 9:52 am

No craze...just considering any options.

MikeyZR5 · Post by **MikeyZR5** » Fri Sep 12, 2003 10:15 pm

So....Any other products that are good to use?

Conman · Post by **Conman** » Sat Sep 13, 2003 5:42 am

quickbiker wrote:What's the big craze with synthetic these days? When I did the craze years ago, that stuff gave me nothing but troubles. So now I just stick with the blue light special stuff, all problems gone.

I think it really depends on the vehicle. If the vehicle has been using regular oil it's whole life, no reason to change and probably no benefit.

But with some vehicles, IMHO I think it works well. My Trooper I have been using Mobil1 since the first oil change. Mine appears to be losing no oil compared to some who say they loose higher than normal oil loss. Also, on some OHV engines, they make Ticking sounds which can be cleared up with 0w30 mobil1(Isuzu TSB states this as the cleaning method on the Rodeo) so there has got to be some advantage to using Syn.

But on my Crew, I'm using the regular stuff so far. Why, This engine has been around for a while so the design and tolerances probably won't benefit from syn oil. As for my trooper, it appears the tolerances are much tighter which benefits from Syn. oils.

BTW, there is regular oil in 5w30 which might negate the benefits of Syn Oils(that was their biggest advantage was to have a wide range like 5w/30 and 0w30).

So I'm using Syn in one and regular in another(engine oil that is). But if money is no object, I would use Syn in all fluids cause there is some advantages to using Syn oil. I'm changing over to Syn oil on my motorcycle at the next oil change as I was reading a cycle mag report on an oil review and I can see some benefits that might help my air-cooled engine. BTW, my engine shares the oil between the engine and tranny like many motorcycles. If you don't know this either, there is different Oil Standards for Cycles and the Mag report did a breakdown test even between same brand auto and cycle oils and there were difference in content. Very Interesting as I thought it was more a marking plow than actual differences.

Your milage will vary.....

Cheers,

Con

MikeyZR5 · Post by **MikeyZR5** » Sat Sep 13, 2003 5:48 am

Cool...How about other GL-5 fluids? Has anyone used anything other than the GMC one?

quickbiker · Post by **quickbiker** » Sat Sep 13, 2003 6:21 pm

LOL, getting back on the subject now. I'm not sure. But I think I will be doing it soon, since I'm tired of paying for the GM stuff and I got alot of GL5 I've piled up through the years I gotta use up. I'll let ya know. But I'm not caring much about my rear diff lately, as I am tire of it slipping when I need it and am seriously thinking of getting the Detroit C locker.

S-10CREWCAB.NET

GL-5 or GL-4

GL-5 or GL-4

Re: GL-5 or GL-4

Re: GL-5 or GL-4