Is Royal Purple Really That Good? - Page 2 - MustangForums.com


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Old 01-20-2013, 08:54 PM   #11
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Not sure if this will help. I've been running RP in my 06 MINI Cooper S for about 5 years now. I've sent my oil off to be tested a few times, and tests come back fine. I use it because the car runs cooler when I use it. I've ran other oils, but the operating temp is always higher. I'm sticking with RP now. I've never had a dyno test, but it does seem peppier as well. That could be in my head. I'm also running RP tranny fluid, and I can tell a difference from that as well.
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Old 01-28-2013, 03:50 PM   #12
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Ive been telling myself for years I'm switching over to AMSoil and after some heavy research once winter brakes I'm gonna go with it, trans, motor, rear.
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Old 01-28-2013, 04:41 PM   #13
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My tranny used to be noisy before I changed over to RP. Quiet & smooth now. I use RP for all my Mustang fluids.
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Old 01-28-2013, 04:54 PM   #14
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Fact is, there are only a few oils that are TRUE synthetic oils. Royal Purple, RedLine, Amsoil and (there is another one I think but my brain just stopped...it's late in the day.)

Your Mobil1s, Pennsoils, Castrol etc are NOT TRUE synthetics. They are actually semi-synthetics. If I were to switch to a TRUE synthetic, I would go with Amsoil. I use their stuff in my truck (other than actual engine oil) and they do a wonderful job. My Trans, both diffs, powersteering, etc is ALL Amsoil. Truck leaks/burns too much oil for me to justify spending 4X as much on oil when I'm buying 15qts of 15w40 at a time.
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Old 02-16-2013, 09:44 PM   #15
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When bought my mustang with 120k on it, the first thing I did was to change all the fluids to royal purple. they are a great company based out of texas with awsome customer support, I called them to figure out what fluid would work best in my 5spd and he recomended synchromax, b/c that is what he ran in his boosted cobra. my trans. seemed to go in and out of gears better after a couple days. In my opinion it is worth the money.
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Old 03-16-2013, 10:04 PM   #16
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Quote:
Originally Posted by CPTCO View Post
Coincidence that I happened to be on here when you revived my thread. That's interesting. Not sure what the price difference would be between Mobil one and royal purple. I would still like to see it done with factory fluids for comparison. Wonder what the up gain would be on a car with 50000 miles.
Not sure myself been using Mobil 1 EP now trying out RP out both expensive as hell I will be putting it on a dyno shortly though I put the numbers on.
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Old 03-16-2013, 10:27 PM   #17
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Not sure myself been using Mobil 1 EP now trying out RP out both expensive as hell I will be putting it on a dyno shortly though I put the numbers on.
Fantastic. Let us know.
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Old 03-18-2013, 09:50 PM   #18
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I know my manual tranny seemed smoother and shifted better when I initially put RP in over the stock oil. I am starting to think I may need to go back to a regular synthetic though.. not sure why, just feels like there isn't any oil in there, kinda like it is breaking down...?

If I were you, I'd stick with MOBILE 1 synthetic for the motor oil, plenty of history for long running engines on that. Seems to be some spotty stuff with RP. Best of luck whatever you decide.
I still have not swapped out my tranny fluid, but my gut is telling me the RP fluid does not dissipate the heat. I have heard reports of manuals running RP and failing, I am wondering if this is why. If my tranny runs cooler after I change the fluid, that will be proof to me, at least wrt the gear oil.
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Old 03-19-2013, 07:43 PM   #19
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Quote:
Originally Posted by rednekpimp View Post
When bought my mustang with 120k on it, the first thing I did was to change all the fluids to royal purple. they are a great company based out of texas with awsome customer support, I called them to figure out what fluid would work best in my 5spd and he recomended synchromax, b/c that is what he ran in his boosted cobra. my trans. seemed to go in and out of gears better after a couple days. In my opinion it is worth the money.
I have not used RP Motor Oil BUT have also used the Syncromax and my shifting seems better and also runs cooler as my shifter used to put out a lot of heat and now it seems to be decreased. And I have 90k on my '07 GT/CS changed to the RP Syncromax at about 50k
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Old 03-21-2013, 12:09 AM   #20
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Last edited by SXGT; 03-21-2013 at 12:25 AM.
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