Does anyone have an on-line source for a good GL5 gear oil for the diff?

I've been putting this off and decided it's about time to change it. I ran out to 3 local stores and all they had was a Valvoline synth blend.

I was going to run something like AMSOil or Royal Purple based on rec's from this board. Now I find I can't get it easily around here... Thinking about being lazy and just buying a case on-line.

Help. Where? How much?

THANKS! (and I guess my gears will thank you too)

 

I buy GL5 Synthetic 75W-90 Mobil gear lubricant in quart bottles at either Pep Boys or at an Advance store. It runs about $7+ per quart. This is the lubricant that is specified for the outdrive of a diesel-powered boat I have and has to be changed once per year. I've seen this lubricant in other brands for as much as $12 per quart. Don't let anyone talk you into a synthetic blend because it lacks the extreme pressure properties. Don't know how much is needed to change out a differential.

I'm concerned that if I take it to the dealer or to a lube shop, they will top off the differential with a non-spec lubricant that won't do the job.

 

Try www.oiltown.com for royal purple gear lube. They have the best price I have seen.

 

Mobil 1 GL-5 75W-90 is probably the most readily available full synthetic gear lube. I know Autozone usually stocks it as well. Oil is no featherweight, so shipping costs can be high if you have to mail order the stuff.

 

NAPA has it, little pricey but good stuff...

 

Here's a link for Redline:
http://www.myoilshop.com/AutoPrds.html

Here's a link for Amsoil:
http://www.amsoil.com/

In my situation, its easier for me to order online and have it delivered to my door.

But any PepBoys carry Mobil1 Gear Lubes - nothing wrong with that either.

As far as markup's go, I can buy Redline online and have it delivered for a little less than my local source can sell it to me for - and due to their hours and not open on the weekends, they can't get my business.