opinions on royal purple oil

**luvmyz28** · 03-05-2009, 06:40 AM

I'm thinkin of using royal purple for my trans and rear end. I have a six speed trans. what do you all think about the purple stuff?

**DIRTY JERZY** · 03-05-2009, 06:47 AM

Waste of money

**konigandy6** · 03-05-2009, 06:54 AM

Originally Posted by DIRTY JERZY

Waste of money

+1

Use the GM fluid and just change it every season.

**luvmyz28** · 03-05-2009, 07:03 AM

what brand does gm recommend for the rear and trans? I have mobile 1 in my tranny now. I noticed one day when it was really cold it was a little stiff goin into 2nd and 3rd gear even after the car was warmed up.

**konigandy6** · 03-05-2009, 07:19 AM

Originally Posted by luvmyz28

what brand does gm recommend for the rear and trans? I have mobile 1 in my tranny now. I noticed one day when it was really cold it was a little stiff goin into 2nd and 3rd gear even after the car was warmed up.

The trans is just standard ATF fluid ...fairly cheap from the dealer.

I'm not 100% sure on the rear axle fluid. But you have to add the limited slip diff fluid too.

**luvmyz28** · 03-05-2009, 07:58 AM

ok thanks I'll check into it.
so you didnt see any difference as far as smoother shifts with royal purple?

**konigandy6** · 03-05-2009, 09:23 AM

Originally Posted by luvmyz28

ok thanks I'll check into it.
so you didnt see any difference as far as smoother shifts with royal purple?

Never tried Royal Purple... but I have tried other off the shelf synthetics and didn't notice a single difference. Stick with GM fluid. It's all good as long as you change it when required.

**DIRTY JERZY** · 03-05-2009, 11:14 AM

Regular atf3 fluid for the trans synthetic rear end fluid 75-90w

**DIRTY JERZY** · 03-05-2009, 11:16 AM

You only need the addative if you have a clutch type limited slip not the one with the worm gears

**Y2KPewterSS** · 03-05-2009, 04:26 PM

Royal Purple is Barney piss, think about that as you pour it into your car.

**blue02Z** · 03-05-2009, 04:39 PM

use dex VI from your dealer. good stuff, also just get their synthetic rear end lube 75-90 like mentioned above. it has a grape scent so it must be good

but really it'll be fine

**JwMonE99** · 03-05-2009, 04:58 PM

Sarge likes Royal Purple oil so that must be good....

**jray0305usa** · 03-05-2009, 06:03 PM

ive ran it in my car for the last to changes... i dunt really kno if its any better but i havent broke anything... in the trans to and its still together... some gm engine builders run it what could it hurt...

**levityinc3** · 03-05-2009, 06:07 PM

If Sarge sees this he's going to shit on you.

**jmatt07** · 03-05-2009, 06:08 PM

I keep hearing guys say that royal purple is shit but i have yet to here any reasons why. So.....why is royal purple so bad?

**levityinc3** · 03-05-2009, 06:10 PM

Originally Posted by jmatt07

I keep hearing guys say that royal purple is shit but i have yet to here any reasons why. So.....why is royal purple so bad?

There are tons of threads stating why royal purple is bad. My thread, Best Oil? Or the I'm a Oil Junkie thread. I guarantee there's more.

Read them. Learn.

**km346** · 03-06-2009, 07:44 AM

Do not use dex VI in a t-56! here are a few clips from various TSB's:

MANUAL TRANSMISSIONS AND TRANSFER CASES
The content of this bulletin does not apply to manual transmissions or transfer cases. Any vehicle that previously required DEXRON®-III for a manual transmission or transfer case should now use P/N 88861800. This fluid is labeled Manual Transmission and Transfer Case Fluid.

Recommendation/Instructions:

Manual Transmission fluid part number 88861800 U.S. (88861801 Canada) is currently available through GMSPO. Current and past model vehicles listed above with either a manual transmission or transfer case that REQUIRE Dexron III should use the above listed manual transmission fluid. This fluid is a direct replacement for Dexron III in manual transmissions and transfer cases. DO NOT use Dexron VI in place of the manual transmission fluid in any manual transmissions or transfer cases as a failure may result.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

**km346** · 03-06-2009, 07:49 AM

to the OP just run regular cheap DEX III in the tranny, and whichever 75W90 you want in the ass end. change them once and a while and you'll be fine.

**luvmyz28** · 03-06-2009, 11:48 AM

i was just curious if there were any lubricants out there that performed any better than the others. I have mobile 1 dex III in the tranny that I put in last summer while I had the car raised doing the header install. the sticker on the tranny just said dex III. so I just went with mobile 1 being that I use it in the motor all the time. like I said above I just noticed a little struggle shifting into 2nd and 3rd in cold weather that I never noticed before. not a big deal though because I rarely drive in the cold months. It just made me think that maybe I should look into something different that may shift smoother in the cold.