Is Royal Purple Really That Good?
Joined: Jan 2013
Posts: 4
From: New Jersey
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.
2nd Gear Member
Joined: Oct 2011
Posts: 445
From: MD
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.
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.
Joined: Feb 2013
Posts: 3
From: Kansas
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.
1st Gear Member
Joined: Aug 2011
Posts: 84
From: Arizona
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.
Thread Starter
5th Gear Member
Joined: Apr 2012
Posts: 2,793
From: Colorado
2nd Gear Member
Joined: Mar 2012
Posts: 310
From: CO
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.
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.
2nd Gear Member
Joined: Jan 2008
Posts: 181
From: Connecticut
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.
