ROYAL Purple Engine OIL Question ?

[mprus]

Hi people, im currently very confused about this product, but after doing lots of research, ive come to a complete hault.

We all know that there are different brands and numbers for oils.

The Mazda 3 requires SAE 5W20 OIL. Royal Purple sells 5W20, but not SAE 5W20 OIL. WIll there be a difference? Theres no label saying SAE on the bottle ?

And where to buy this?

THanks Mike

[mprus]

http://www.istop.com/~fbiglar/Mazda/IMG_1877.JPG

http://us.st12.yimg.com/us.st.yimg.com/I/mustangtuning_2019_306508570

One says SAE 5W20 and the other just says "5W20"

Difference?

[allen@simplytire.com]

It's the same...

To better understand the numerical code used, a brief explanation is in order. When referencing motor oil weight, you are actually referring to the viscosity grade or the tendency of a liquid to flow slowly or quickly. The Society of Automotive Engineers (SAE) developed a grading system to designate the viscosity level of single grade and multigrade motor oils. In single grade oils, the lower the number, the better it flows at cold temperatures. Likewise, the higher the number, the thicker the oil. In regard to multigrade oils, the first number in the code, such as “10W” in SAE 10W-30, means that the oil can still be pumped by the engine at a temperature as low as a single grade 10W oil. A “5W,” like in SAE 5W-30, can be pumped at an even lower temperature, and a “0W,” like in SAE 0W-30, will pump at the lowest tested temperatures. The W in the designation is commonly thought to represent Weight, but in fact stands for Winter. The second number, “30”, indicates how well the oil will flow when heated to 100° C/212° F or higher.

[mprus]

So to fully understand what your telling me, is that SAE is just a grading scale. WITH OR WITHOUT IT, its the same .?

[allen@simplytire.com]

Well, the SAE created the grading scale... no matter what, motor oil with a grade is SAE !!!

[mprus]

thanks alot Allen

[Flagrum_3]

Regardless of SAE or no SAE on the front label, read the back label which specifies exactly what you need to know! Anyways the question about this specific oil meaning Royal Purple has come up many many times on this forum and for anyone who wants an affirmative answer;Royal Purple Synthetic is perfectly safe to use on our Mazda's, whether MZ3 or MS3.It Exceeds Warranty Requirements, is an SL grade which is what is called for and will outperform many other synthetics.

_3

[allen@simplytire.com]

No problem...

Royal Purple FTW.

[midnightfxgt]

I use Royal Purple 15W40, and love the stuff :)

[Mazda3X2]

Man you must be on the payroll :chuckle

Not sure when the change happened but new Mazdas call for SM, not SL any more. Difference being less ZDDP (Zinc dithiophosphates) in the newest SM rating, which was found to harm catalytic converters. The difference is in PPM and it looks as though RP didn't want to change these levels in their oils as of yet to meet the new standard.

SL API oil rating 2004
zinc = 0.110%, 1100ppm
phosphorous = 0.100%, 1000ppm

SM API oil rating 2005
zinc = 0.087%, 870ppm
phosphorous = 0.080%, 800ppm



Regardless of SAE or no SAE on the front label, read the back label which specifies exactly what you need to know! Anyways the question about this specific oil meaning Royal Purple has come up many many times on this forum and for anyone who wants an affirmative answer;Royal Purple Synthetic is perfectly safe to use on our Mazda's, whether MZ3 or MS3.It Exceeds Warranty Requirements, is an SL grade which is what is called for and will outperform many other synthetics.

_3

[Flagrum_3]

I'm not on RP's payroll, :)...its just that the same question has come up several times in the past week! Just gets me a little peaved when people don't search, find and read other threads and then make the same statements or ask the same questions in a new thread.:bang

SL is what Mazda called for in my '05 Manual' and I mentioned in another thread that that might have changed with the newer models but no one ever ellaborated!!....but now that I see (from your statement) that they have indeed changed to a SM rating then I'll agree my earlier statement would have to be revised to effect the change.

Now I'm curious as to when Mazda did change the requirements? ....We would need people here with the various years to read their manuals and post thier findings.

Also if that is the only difference between the two oils ratings, I find it laughable as the differences in parts per million is so minimal, How would that minute change save a catalytic converter, if that was the reason for the change?


_3

[Mazda3X2]

It was found that higher levels of zinc and phosphorous would coat the inside of the cat over time. Thus reducing the interaction between your exhaust gas and the catalytic material making it less effective.

As small of a reduction as it may seem to us, it has now been accepted as the new industry standard. Laughable or not.