Royal Purple gear oil

stangboy

Founding Member

Aug 31, 1999

3,932

469

194

New Orleans, LA

Feb 20, 2013

#1

• Feb 20, 2013

• #1

If I'm using Royal Purple gear oil in my rearend do I need the friction modifier? Royal Purple claims to already have friction modifier in their gear oil. LMR sells RP gear oil with a bottle of friction modifier. I always wondered why if RP already has friction modifier in it already. Is there something I'm not getting here?

 

srtthis

the guy doing it does every local racers rear end

15 Year Member

Jul 3, 2009

5,129

1,666

204

Maryland

Feb 21, 2013

#2

• Feb 21, 2013

• #2

it has it but some people still like to add it. doesnt hurt anything by adding it

 

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Riverart

Well-Known Member

Oct 29, 2007

171

39

59

Ontario, CA

Feb 21, 2013

#3

• Feb 21, 2013

• #3

i added both to my ride.

 

stangboy

Founding Member

Aug 31, 1999

3,932

469

194

New Orleans, LA

Feb 21, 2013

#4

• Feb 21, 2013

• #4

Ok then I guess I'll add it just for good measure.

 

srtthis

the guy doing it does every local racers rear end

15 Year Member

Jul 3, 2009

5,129

1,666

204

Maryland

Feb 21, 2013

#5

• Feb 21, 2013

• #5

im kinda curious to know if there is any advantage to adding it with my spool... id like to try and make things spin as freely as i can

 

90lxcoupe

20+ Year Stangneter

Oct 7, 2003

3,596

350

134

Feb 21, 2013

#6

• Feb 21, 2013

• #6

Ive read some not so stellar reports on RP gear oil. I switched to amsoil in that and in my old truck, when i had the rear rebuilt from ford, it would chatter like crazy around corners. I swapped that to amsoil also, and the chattering went away 100%

When i had a posi, i always put two containers of friction modifier in with the oil.

Id use amsoil, mobil1, or redline. All three of these brands did well in the analysis that i read.

 

Reactions: stangboy