Castrol was asked to bring their best oil, and they did. Royal Purple picked up 2.72% more horsepower. This is the same experience several race teams here in Norway have seen and as well the need for rebuilding the engines have decreased. Seems like Royal Purple not only gives you more horsepower, but it also keep your engine more healthy. As I have said before; Castrol is better in marketing, than making oils. No surprise to me. The only surprise is that so many people haven't understood this before. Besides, you can count in a 2.7% reduction in fuelcosts if you use RP.
Castrol vs Royal Purple
- Thread starter Achilles
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There is alot of misuse of data(that is not data but our hearsay of data) occurring here ^
Seems like it.
x3
What is the repeatability of a dyno run?
You would need to control intake air temp and humidity as well as, warm up time of engine etc. Just listing two different horsepowers is useless without the other details of the test.
You would need to control intake air temp and humidity as well as, warm up time of engine etc. Just listing two different horsepowers is useless without the other details of the test.
People claim to have a 2-5mpg difference between Mobil 5w30 and Castrol 0w30.
But a 10w60 vs 10w40? LOL thats a 20 weight difference !
But a 10w60 vs 10w40? LOL thats a 20 weight difference !
Its the closest VI they could get comparing apples with apples. Castrol Rs doen't come in 10w40 so they had to do what they good with what they had.
FYI: NO RP or Castrol Representatives were present, was done by a independant gentleman who actually uses Shell Helix Ultra so for him it was nuetral.
Amb temp: 22 degrees C
Each oil before Dyno was run on Dyno for 3-5 min.
No available graphs, in SA we cannot by law break any other company by clever marketing as in US.
We not allowed to put down anyone so respecfully well done to Castrol and RP.
Now i need to go to work!
FYI: NO RP or Castrol Representatives were present, was done by a independant gentleman who actually uses Shell Helix Ultra so for him it was nuetral.
Amb temp: 22 degrees C
Each oil before Dyno was run on Dyno for 3-5 min.
No available graphs, in SA we cannot by law break any other company by clever marketing as in US.
We not allowed to put down anyone so respecfully well done to Castrol and RP.
Now i need to go to work!
All these magazines have tested RP and found it to increase horsepower: SnoWest magazine
The technological advances in engines, lubrication and fuel should help everyone breather a little easier.
Modified Mag
Racing and performance enthusiasts recognize the advantages of synthetic motor oil.
Circle Track & Racing magazine
Good advice for keeping your car and yourself cool under pressure.
Street Thunder magazine
Street Thunder magazine performs their Garage Test of RP Motor Oil.
Fleet Maintenance magazine
Six easy steps when considering upgrading your fleet's lubrication.
Metro Media Syndicates
Learn how to select the motor oil that will optimize your car's performance.
Handy magazine
Member tested and recommended; Handy Magazine tests Royal Purple® motor oil.
Hot Rod magazine
Hot Rod Magazine endorses Royal Purple® lubricants.
A synthetic oil primer: Is synthetic oil really worth it?
Pull out the magic wand, synthetic oil, to improve both horsepower and torque.
Performance Auto & Sound magazine
High quality lubricants improve automobile performance.
Tuner Performance Reports magazine
Follow along as Tuner Performance Reports enhances a 2002 Honda Accord.
Drag Racer magazine
Motorists need a high performance motor oil to protect those expensive multiple valve trains and lightweight alloy engine components.
Drag Sport magazine
Ten tricks to free up horsepower on your automobile.
Really interesting that so many sources can be so wrong about their findings. The strangest thing though, is why their testing always show that RP gains horsepower. Maybe it could be so?
The technological advances in engines, lubrication and fuel should help everyone breather a little easier.
Modified Mag
Racing and performance enthusiasts recognize the advantages of synthetic motor oil.
Circle Track & Racing magazine
Good advice for keeping your car and yourself cool under pressure.
Street Thunder magazine
Street Thunder magazine performs their Garage Test of RP Motor Oil.
Fleet Maintenance magazine
Six easy steps when considering upgrading your fleet's lubrication.
Metro Media Syndicates
Learn how to select the motor oil that will optimize your car's performance.
Handy magazine
Member tested and recommended; Handy Magazine tests Royal Purple® motor oil.
Hot Rod magazine
Hot Rod Magazine endorses Royal Purple® lubricants.
A synthetic oil primer: Is synthetic oil really worth it?
Pull out the magic wand, synthetic oil, to improve both horsepower and torque.
Performance Auto & Sound magazine
High quality lubricants improve automobile performance.
Tuner Performance Reports magazine
Follow along as Tuner Performance Reports enhances a 2002 Honda Accord.
Drag Racer magazine
Motorists need a high performance motor oil to protect those expensive multiple valve trains and lightweight alloy engine components.
Drag Sport magazine
Ten tricks to free up horsepower on your automobile.
Really interesting that so many sources can be so wrong about their findings. The strangest thing though, is why their testing always show that RP gains horsepower. Maybe it could be so?
What is the repeatability of a Dyno run; indeed!
Back to back runs are generally within 1% of each other. So, over a period of 1 minute the dyno is accurate in the 1% range (or better).
However, if you fill up the tank in the car, apply adequate cooling, and run 200 straight dyno runs, you will find around 3% from the best to the worst run over ther 1+ hours the car is on the dyno.
So, here the question is: was the 3% from the inaccuracy of the dyno, or was the 3% from the engine varying its actual output over the duration of these runs, or both? I suspect the engine output has more variance than the dyno reading process.
We have seen the same car operating at the same temperature-guage temperatures (oil and water) once in the morning (9 AM) and once at mid-day vary by some 7% (mainly due to ambient temperature and rel-humidity effects).
Anyone who uses more than 2 significant digits when answering a question about the HP/TQ numbers for their cars are simply fooling themselves....
Dynos are powerful tools when used correctly--like looking at the shapes of the curves--and highly suspect when only the peak numbers are used (max TQ, max HP). The shape of the curve will vary little from morning to noon to dusk, while the peak numbers will vary all over the map.
Dyno runs generally are (and should be) corrected for ambient temps, rel-humidity, and barometric pressures back to Standard-Temp-and-Pressure (STP), so that a dyno run done in 0dF temps can be compared to a dyno run done at 100dF--even though the engine will be producing 13% more power at 0dF than at 100dF (all other factors being equal)!
Back to back runs are generally within 1% of each other. So, over a period of 1 minute the dyno is accurate in the 1% range (or better).
However, if you fill up the tank in the car, apply adequate cooling, and run 200 straight dyno runs, you will find around 3% from the best to the worst run over ther 1+ hours the car is on the dyno.
So, here the question is: was the 3% from the inaccuracy of the dyno, or was the 3% from the engine varying its actual output over the duration of these runs, or both? I suspect the engine output has more variance than the dyno reading process.
We have seen the same car operating at the same temperature-guage temperatures (oil and water) once in the morning (9 AM) and once at mid-day vary by some 7% (mainly due to ambient temperature and rel-humidity effects).
Anyone who uses more than 2 significant digits when answering a question about the HP/TQ numbers for their cars are simply fooling themselves....
Dynos are powerful tools when used correctly--like looking at the shapes of the curves--and highly suspect when only the peak numbers are used (max TQ, max HP). The shape of the curve will vary little from morning to noon to dusk, while the peak numbers will vary all over the map.
Dyno runs generally are (and should be) corrected for ambient temps, rel-humidity, and barometric pressures back to Standard-Temp-and-Pressure (STP), so that a dyno run done in 0dF temps can be compared to a dyno run done at 100dF--even though the engine will be producing 13% more power at 0dF than at 100dF (all other factors being equal)!
"What oil(s) is being compared against RP in all of those tests? Another synthetic oil? Or a conventional oil? "
We don't know what oil is being used (in many cases), nor the weight of that oil, and more importantly: we don't know how many miles on that oil. It is possible that one is comparing a fresh batch of 0W-30 against a batch of 20W-50 with 10,000 miles on it.
The only FAIR way to do this test is to start with one brand of fresh oil (with zero miles), run the dyno, change brands of oil but keep the weight the same, run the dyno, change back to another fresh batch of the starting oil, run the dyno, and change back to the second oil (again) and run the dyno. {Changing the filter each time}
By looking at all 4 sets of dyno graphs, one can begin to actually know something about the oils and engine and dyno. By averaging the first and third runs and averaging the second and fourth runs, and comparing both averages, you can see if there is any significant actual difference.
All 4 runs need to take place in less than 1 hour or the data becomes suspect (again). This makes it very difficult to change the tranny oil and differential oil at the same time the engine oil gets changed. And also means you might only get 30%-50% of the advertized gain if you only change the engine oil (if that much).
Idealy, one would like to instrument the car under test, and set up a situation where the engine, tranny, and differential oils can be changed while the engine is running (or briefly stopped) so that one can run all of the tests in a short amount of time, at the same engine, tranny, and differential temperatures, and at the same TIRE temperatures. But this makes the test "expensive" to run (and set up to run).
We don't know what oil is being used (in many cases), nor the weight of that oil, and more importantly: we don't know how many miles on that oil. It is possible that one is comparing a fresh batch of 0W-30 against a batch of 20W-50 with 10,000 miles on it.
The only FAIR way to do this test is to start with one brand of fresh oil (with zero miles), run the dyno, change brands of oil but keep the weight the same, run the dyno, change back to another fresh batch of the starting oil, run the dyno, and change back to the second oil (again) and run the dyno. {Changing the filter each time}
By looking at all 4 sets of dyno graphs, one can begin to actually know something about the oils and engine and dyno. By averaging the first and third runs and averaging the second and fourth runs, and comparing both averages, you can see if there is any significant actual difference.
All 4 runs need to take place in less than 1 hour or the data becomes suspect (again). This makes it very difficult to change the tranny oil and differential oil at the same time the engine oil gets changed. And also means you might only get 30%-50% of the advertized gain if you only change the engine oil (if that much).
Idealy, one would like to instrument the car under test, and set up a situation where the engine, tranny, and differential oils can be changed while the engine is running (or briefly stopped) so that one can run all of the tests in a short amount of time, at the same engine, tranny, and differential temperatures, and at the same TIRE temperatures. But this makes the test "expensive" to run (and set up to run).
What oil(s) is being compared against RP in all of those tests? Another synthetic oil? Or a conventional oil?
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