Royal Purple Like Result
Thread Starter
Instructor
Joined: Sep 2005
Posts: 222
Likes: 1
From: Brenham Texas
Royal Purple Like Result
Changed my differential fluid to royal purple.
Was hearing some roaring noise on right and left turns.
After the change no more noise.
I think I am going to use it in the trans and motor also.
Anyone running royal purple in the motor ??
Seems to be some high quality stuff.
Was hearing some roaring noise on right and left turns.
After the change no more noise.
I think I am going to use it in the trans and motor also.
Anyone running royal purple in the motor ??
Seems to be some high quality stuff.
Melting Slicks
Joined: Jul 2005
Posts: 2,572
Likes: 3
From: Rehoboth MA . . . NRA Life Member
St. Jude Donor '06-'07
In the spring, I'll be changing my rear differential fluid and transmission fluid. 
Transmission: Royal Purple Synchromax.
Differential: Royal Purple 75W90 Synthetic Max Gear Oil
Engine: Red Line’s Synthetic 10W40 Engine Oil
Bob
Transmission: Royal Purple Synchromax.
Differential: Royal Purple 75W90 Synthetic Max Gear Oil
Engine: Red Line’s Synthetic 10W40 Engine Oil
Bob
Melting Slicks
Joined: Jan 2004
Posts: 2,746
Likes: 2
From: St. james NY
Yeah I run the RP 5w30 in the engine. I might step up to 10w40 in the summer, not sure though???
I like RP alot!! Car used to smoke some oil a tad when on it hard. I noticed it on the dyno. After RP no more!
I like RP alot!! Car used to smoke some oil a tad when on it hard. I noticed it on the dyno. After RP no more!
Life Time NCM #2196
Joined: Sep 2004
Posts: 82,597
Likes: 1,712
From: Converse TX
I use RP in the motor 10/30, trans MN6 and differential. I have a FI engine so I can not tell you if I like it better than Mobil 1 my mechanic loves it, however the tranny shifts eaiser and the rear seems quieter. My mechanic uses it in all his Vettes (5) and Esclade. If your are stock for the motor I had no issues with Mobil 1, however the trans was well worth the change and a somewhat quieter differential is also a plus
Le Mans Master
Joined: Feb 1999
Posts: 9,938
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
I am going to change my oil Friday, and was wondering, was there lower oil temps when useing Royal Purple in any of your Vettes?
I use Mobil 1, 10w30. But I have a larger motor, 3.73 gears and a higher stall in my C4, which causes the motor oil to run a little hotter.
I use Mobil 1, 10w30. But I have a larger motor, 3.73 gears and a higher stall in my C4, which causes the motor oil to run a little hotter.
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Instructor
Joined: Oct 2005
Posts: 219
Likes: 1
From: Hobbs NM
St. Jude Donor '06
I changed to RP Synromax in my M6 and GearMax in the rearend last Friday. Transmission seems to be smoother now. A lot of racers I know use it with good results so it made the choice alot easier for me.
Melting Slicks
Joined: Sep 2003
Posts: 2,911
Likes: 1
From: Augusta GA
St. Jude Donor '05-'06
I changed my M12 tranny to RP a week or so ago...huge change and feels much better. Heck it is even smooth when cold and not all tight like it was with GM fluid in it (had 10k on the fluid too from dealer work). Next up, motor oil!
Dave
Dave
Le Mans Master
Joined: Dec 2000
Posts: 7,096
Likes: 153
From: "Atlanta" Ga.
Originally Posted by BobbyG
In the spring, I'll be changing my rear differential fluid and transmission fluid.
Transmission: Royal Purple Synchromax.
Differential: Royal Purple 75W90 Synthetic Max Gear Oil
Engine: Red Line’s Synthetic 10W40 Engine Oil
Bob
Transmission: Royal Purple Synchromax.
Differential: Royal Purple 75W90 Synthetic Max Gear Oil
Engine: Red Line’s Synthetic 10W40 Engine Oil
Bob
Thanks, Gonzo
Melting Slicks
Joined: Aug 2004
Posts: 2,052
Likes: 20
From: boston mass
03 z06
Originally Posted by BobbyG
In the spring, I'll be changing my rear differential fluid and transmission fluid.
Transmission: Royal Purple Synchromax.
Differential: Royal Purple 75W90 Synthetic Max Gear Oil
Engine: Red Line’s Synthetic 10W40 Engine Oil
Bob
Transmission: Royal Purple Synchromax.
Differential: Royal Purple 75W90 Synthetic Max Gear Oil
Engine: Red Line’s Synthetic 10W40 Engine Oil
Bob
Safety Car
Joined: Jan 2004
Posts: 4,776
Likes: 142
From: North of Atlanta GA
St. Jude Donor '05
Just changed to RP motor oil last weekend, temp a few degrees lower, runs good. Will probably do the rear end this weekend. Would like to change tranny to RP but not ready to takle that one car only has 33k on it.
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
This past week I went all RP. 10W30 in the engine, ATF in the tranny and 75W90 in the diff.
The emgine seems to have lost the piston slap on start up..it wasn't a bad slap but noticeable for about mile of driving....RP seems to have quieted that down.
Have also changed all fluids in my Jeep to RP...guess you can say I'm sold on it.
The emgine seems to have lost the piston slap on start up..it wasn't a bad slap but noticeable for about mile of driving....RP seems to have quieted that down.
Have also changed all fluids in my Jeep to RP...guess you can say I'm sold on it.
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Originally Posted by tramminc
how many quarts for tran' & differ'
Ther diff takes 2 Quarts of 75W90