Ok so last Saturday at 52k miles I switched to Royal Purple 5W30 from Whatever regular oil the dealer uses. I noticed an immediate horsepower gain when I hit the street. Did not think much of it and thought is was psychological. So today I drive it to work and there is definitely a horsepower gain. I was driving along not even thinking about it and felt some extra juice and recalled that I had switched to that Purp.
Is Royal Purple for real???
- Thread starter zx12rtoo
- Start date
I have been on Royal Purple for a while. It is surely different and much better than any other oil that I have used (Mobile-1, Infiniti stock oil, some other imported oil that I can't recall).
However, it is recommended to use Royal Purple on the new car. The reason is RP has very good penetration, so on the older engine (that implies to engine that has very high mileage and 10 years old), you may end up spotting oil leaks. However, it is good to use RP to check engine leak as well.
However, it is recommended to use Royal Purple on the new car. The reason is RP has very good penetration, so on the older engine (that implies to engine that has very high mileage and 10 years old), you may end up spotting oil leaks. However, it is good to use RP to check engine leak as well.
It's on average about 2hp increase per cylinder. But no real data to support that.
Just In! - Drag Sport magazine: 
hp gain of 2.5%
D & D Performance Enterprises:hp gain of 1.2%, torque gain of 1.3%
Diesel World magazine:hp gain of 3.2%
Drag Sport magazine:hp gain of 3.2%, torque gain of 1.5%
GM High-Tech Performance magazine:hp gain of 5.2
GM High-Tech Performance magazine:In a separate test, hp gain of 10+, torque gain of nearly 12 ft-lbs
Horsepower TV:hp gain of 8, torque gain of 6 ft-lbs
Horsepower TV:In a separate test, hp gain of 2.9%
Hot Rod Magazine:hp gain of 2.5%, torque gain of 1.5%
Hot Rod Magazine:In a separate test, hp gain of 1.7%, torque gain of 2.0%
Hot Rod TV:hp gain of 2.5%, torque gain of 1.5%
Oklahoma State University:
diesel engine gain of 2.8% hp
Performance Auto & Sound magazine:hp gain of 3.0%
Sport Truck magazine:gain of 13 hp
Sport Truck magazine:In a separate test, hp gain of 5%, torque gain of 12 lb-ft
Trucks! TV:torque gain as much as 3.5%
Tuner Performance Reports:hp gain of 1.8%
V8TV:hp gain of 2.0%
http://www.royalpurple.com/rp-testing-summaries.html
hp gain of 2.5%D & D Performance Enterprises:
hp gain of 1.2%, torque gain of 1.3%Diesel World magazine:
hp gain of 3.2%Drag Sport magazine:
hp gain of 3.2%, torque gain of 1.5%GM High-Tech Performance magazine:
hp gain of 5.2GM High-Tech Performance magazine:
In a separate test, hp gain of 10+, torque gain of nearly 12 ft-lbsHorsepower TV:
hp gain of 8, torque gain of 6 ft-lbsHorsepower TV:
In a separate test, hp gain of 2.9%Hot Rod Magazine:
hp gain of 2.5%, torque gain of 1.5%Hot Rod Magazine:
In a separate test, hp gain of 1.7%, torque gain of 2.0%Hot Rod TV:
hp gain of 2.5%, torque gain of 1.5%Oklahoma State University:
Performance Auto & Sound magazine:
hp gain of 3.0%Sport Truck magazine:
gain of 13 hpSport Truck magazine:
In a separate test, hp gain of 5%, torque gain of 12 lb-ftTrucks! TV:
torque gain as much as 3.5%Tuner Performance Reports:
hp gain of 1.8%V8TV:
hp gain of 2.0%http://www.royalpurple.com/rp-testing-summaries.html
Good find ChiFX45.
I have been using RP for a while and will continue to use it for the FX.
I have been using RP for a while and will continue to use it for the FX.
solekeeper
Member
Well seems RP does what it's said to do, nice stat find!!
I've used RP on my last 2 oil changes. I can't say I have noticed any real difference, but my engine seems to run a little smoother. Only thing I can say I have noticed is the temp on the oil gauge is cooler then when I was getting my oil changed at the dealer. I know they were using 5W30, just don't know what kinda of oil.
I'm still up in the air about when to change the oil though. They say to change at 3K at first then progress to 5K. So far I changed it at 3K cause they say you have to get the other oil out before you run straight RP.
Anyone have any info on that cause it would be really helpful?
I'm still up in the air about when to change the oil though. They say to change at 3K at first then progress to 5K. So far I changed it at 3K cause they say you have to get the other oil out before you run straight RP.
Anyone have any info on that cause it would be really helpful?
I once did some reading on oils and these are what I could remember:
I'm using Amsoil for the last 4 changes and I like it. Was going to go with Mobil1 but reading that it's no longer full synthetic (they had a case against Castrol I believe that they lost and they're no longer full synthetic but claim that), chose Amsoil
- Amsoil, RP and Pennzoil Plat are all very very good full synthetic oils
- RP has an extra additive that promotes extra lubrication but wears out after a while
- On older cars, RP is not that much of a good choice (can't remember reasoning)
- If you change your oil in close intervals (like we do generally @ 3000-3500 miles) RP's additives will be refreshed more often and it'll be better used
- If you tend to change your oil in 5K+ intervals, RP's additive will be less useful
I'm using Amsoil for the last 4 changes and I like it. Was going to go with Mobil1 but reading that it's no longer full synthetic (they had a case against Castrol I believe that they lost and they're no longer full synthetic but claim that), chose Amsoil
also, RP recommends not changing your oil for 7500 miles. it's part of what they boast about their product and how it can save you money, time, and be more eco-friendly. part of their secret is that the product won't oxidize as quickly as other oils will so it has a longer life-span.
Last edited:
Yup, that was it.. I think if I ever switch to RP, I still wouldn't wait until 7500 miles for a change.. I think 3500-4000 is a good range.. Not like I'm making 30K a year anyways..