Just Ordered Royal Purple HPS+ 5w30, Is This Bad? Should I Have Ordered 5w20?

[Mattr89]

Brenspeed and JDM says it makes no difference. However my local shop says that since where i live in SC that its going to be 80-100 all summer, that 5w30 is better.

I am supercharged and making 500rwhp. Should i just order the 5w20 and send back the 5w30?

I also hate the API oil as they used to have zinc in the oil and then went API standard. The HPS+ oil is basically what royal purple oil was last year and beyond.

I change my oil every 3500 miles, and i use either motorcraft or wix filters because they have silicone anti drain back valves for the prevention of dry starts. If using any other, the car will have a slight tick for 4 seconds after starting.

Thanks in advance for the help.

 

[06 3v]

i ran 5w30 all the time no problems here

 

[Mattr89]

i ran 5w30 all the time no problems here

Are u still running it?

 

[Ampire]

its not going to make a difference.

 

[JeremyH]

I run 10w40 year round in virginia no problem. 5w30 is perfectly fine.

 

[StangPower05]

RP 5w30 ran in my stroker 302 and i have 0 problems. You'll be fine

 

[Mattr89]

Thanks guys! Is the HPS+ with zinc a way to make more money? Or does it really help longevity?

I got them for $8.50 a quart

 

[Mattr89]

I just put in the last quart of 5w30 HPS, I am like maybe 1oz from where I like it, need to top off with 1 oz. instead of buying another HPS quart and having to wait 3 days to get here can I just top off with royal purple API regular full synthetic oil as long as its 5w30?? Since its only an ounce or 2?

 

[Speed+Clinic]

The recomendationg for 5w-20 was made only to get access to the federal bonuses with the CAFE standards, fuel consumption standards, etc. The higher the mpg across the fleet means a bigger %. Ford only warranties the block for 36,000k miles and it doesn't cover a power adder. The slight increased wear and tear occurs either after the warranty expired or when the warranty was already expired because of the power adder lol. The minimal savings in mpg really show up when you multiply the savings fleet wise...

 

[Norm Peterson]

Since its only an ounce or 2?

For that small of an amout it isn't going to make any difference what viscosity oil you put in there, whether you even add it in at all. 2 oz out of about 200 = negligible.

A guy I know from another forum who was somewhat closer to the development of these engines absolutely will not use 5W20.


Norm

 

[Speed+Clinic]

Yeah Norm it is Scott.

 

[OneQwkStang]

Saleen recommends 5 w30 on their S/C cars too, both Brenspeed and JDM are Saleen authorized dealers.

 

[BruceH]

The recomendationg for 5w-20 was made only to get access to the federal bonuses with the CAFE standards, fuel consumption standards, etc. The higher the mpg across the fleet means a bigger %. Ford only warranties the block for 36,000k miles and it doesn't cover a power adder. The slight increased wear and tear occurs either after the warranty expired or when the warranty was already expired because of the power adder lol. The minimal savings in mpg really show up when you multiply the savings fleet wise...

Bullshit. The CAFE thing is nothing more than a conspiricy theory. I could believe that Ford tightened up machining tolerances to make a more efficient motor which in turn would provide better mpg.

Edit: I've never noticed a difference in mpg vs 5w20 or 5w30 or 0w30. If better mpg was obtained with 5w20 why would that be? Better lubrication which results in less drag and resistance.

Here is why 5w20 is speced for the motor: Clearances. Minimum clearances for a 4.6 3v motor: Main bearing .0009", rod bearing .0009", side rod .006" cams to journal .001", piston to bore .0007". Pin to rod and piston .0004". Those are cold clearances. Does anyone know what the hot clearances are or how much change happens at operating temp? It's going to take a fairly thin oil to maintain a wedge and flow enough to take heat away. Even the 3v oil pump has it's own pressure relief value based on the speced oil.

 

[Speed+Clinic]

Bullshit. The CAFE thing is nothing more than a conspiricy theory. I could believe that Ford tightened up machining tolerances to make a more efficient motor which in turn would provide better mpg.

Edit: I've never noticed a difference in mpg vs 5w20 or 5w30 or 0w30. If better mpg was obtained with 5w20 why would that be? Better lubrication which results in less drag and resistance.

Here is why 5w20 is speced for the motor: Clearances. Minimum clearances for a 4.6 3v motor: Main bearing .0009", rod bearing .0009", side rod .006" cams to journal .001", piston to bore .0007". Pin to rod and piston .0004". Those are cold clearances. Does anyone know what the hot clearances are or how much change happens at operating temp? It's going to take a fairly thin oil to maintain a wedge and flow enough to take heat away. Even the 3v oil pump has it's own pressure relief value based on the speced oil.

You do remember that the oil recomendation was lowered halfway thru the production of the engines and ford even "ordered" thedealers to start filling the already built cars with 5w-20. What sudden change in clearances happened?

Do you have any documentation, research or else to prove the point?
You know whats the diference in weights right? Viscosity?

Scott Witthead which was of the main engineers on the 3v proyect has specifically said that he would not put 5w-20 on a 3v engine EVER.

Now please read the first paragraph of the TSB on the oil recomendation change.

TSB 01-4-7

ISSUE:


Engine oil recommended for use in 2001 vehicles is SAE 5W-20 motor oil. This
oil has an improved formulation to improve fuel economy. This oil can also
be used to service some previous model year vehicles.

ACTION:

Use SAE 5W-20 engine oil at recommended oil change intervals for 2001
vehicles, with the exception of the following vehicles listed in the
"Exception 2001 Vehicles" chart. All 2001 vehicles other than those listed
in the "Exception 2001 Vehicles" chart are being filled with SAE 5W-20 motor
oil at the factory and should also be serviced with SAE 5W-20 oil.

Viscosity is a measure of the resistance of a fluid which is being deformed by either shear or tensile stress. It is like the fluid friction, fill up a bucket with water and one with honey. Which one will take more force to circle a broom stick in it?

5W-20 oil is a lighter viscosity than a 5W-30 oil and therefore has less internal engine frictional losses, or less drag on the crankshaft, pistons and valvetrain, which in turn promotes increased fuel economy. This increased fuel economy is virtually undetectable to the average motorist without the use of specialized engine monitoring and testing equipment under strictly controlled test track driving when compared to a 5W-30, 10W-30 or a 0W-30 viscosity motor oil.

http://www.synthetic-oil-tech.com/d.cgi/1245917/ford5w20.htm

http://www.machinerylubrication.com/Read/518/motor-oils

 

[Mattr89]

Bullshit. The CAFE thing is nothing more than a conspiricy theory. I could believe that Ford tightened up machining tolerances to make a more efficient motor which in turn would provide better mpg.

Edit: I've never noticed a difference in mpg vs 5w20 or 5w30 or 0w30. If better mpg was obtained with 5w20 why would that be? Better lubrication which results in less drag and resistance.

Here is why 5w20 is speced for the motor: Clearances. Minimum clearances for a 4.6 3v motor: Main bearing .0009", rod bearing .0009", side rod .006" cams to journal .001", piston to bore .0007". Pin to rod and piston .0004". Those are cold clearances. Does anyone know what the hot clearances are or how much change happens at operating temp? It's going to take a fairly thin oil to maintain a wedge and flow enough to take heat away. Even the 3v oil pump has it's own pressure relief value based on the speced oil.

So should I take my 5w30 out and put back 5w20 or am I fine? I don't want to cause the engine more stress.

 

[bullitt0175]

basically everyone is saying you are fine. your motor doesn't even know the difference. I run RP 5-30 and it runs like a top. never a tic or tap. just leave it as it is and stay consistent with your change intervals and viscosity.

 

[BruceH]

Do you have any documentation, research or else to prove the point?


Scott Witthead which was of the main engineers on the 3v proyect has specifically said that he would not put 5w-20 on a 3v engine EVER.

The clearance information is available in the specifications section of the 4.6 3v manual for the Mustang.

http://iihs.net/fsm/?dir=158&viewfile=SPECIFICATIONS.pdf

Is Scott Whitehead a disgruntled former Ford employee? Has he ever been contridicted by other Ford engineers?

Think about it for a moment: More wear would cause more drag. Your theory that 5w20 will cause both more effiency and more wear contridict each other.

Can you tell me how much force will be required to push 5w20 oil through the oil galley? How much to get it up to the heads and properly lubricate the valvetrain? How much flow is required to effectively lubricate and cool those parts? Pressure and flow have an inverse relation to each other. The oil in a 3v flows from the pickup to the filter to the pump and out through the block getting to the valvetrain last.

I don't have the answers to those questions. It would take quite abit of research, education, prior data, and equipment to determine the optimal blend. Ford has done the research with stock motors.

I can understand wanting to use the best for your engine. I can't understand using something because of a conspiracy theory.

What are you going to spec clearances at on the motor you are about to build?

Edit: Adding answer to another post.

So should I take my 5w30 out and put back 5w20 or am I fine? I don't want to cause the engine more stress.

No. You will be just fine with 5w30. My own experience with it is an increase in valvetrain noise.

 

[Chrome61]

I have a blower on mine and that cap reads 5w20 so that's what I put in it, I live in NC....I'm not smart enough to second guess the engineers.......My ecoboost F150 says the same thing. But the manual on my truck says to change the oil every year or 10,000 miles, so that what i do....lol

 

[kevinatfms]

So should I take my 5w30 out and put back 5w20 or am I fine? I don't want to cause the engine more stress.

your fine, i have been running 5w30 for years. with increased valvetrain loads and such i believe the 30 weight takes longer to degrade than the 20 weight due to the heat cycles that i put my car through.

 

[one eyed willy]

I use valvoline VR1, has lots of zinc for less than $5 a quart....10w30