Just did a Royal Purple Oil change, smoke?

[violametallic-S-]

I just did a oil change on my 01 Boxster S. First time using Royal Purple i went with 5w-30 hopefully thats a wise choice, because after I got home i read about pedro switching to 10 50 to prevent RMS leak.

The main thing here is I noticed black smoke from the exhaust when hard on the throttle. And I never had this before. So im assuming this is a good thing and the oil is cleaning out the internals of the engine, am i correct?

[RandallNeighbour]

I just did an oil change with 0W40 Royal Purple and I saw no smoke out the rearview mirror, but now you've got me looking.

Could be the fact that the RP is dark purple and not light golden brown like the M1...could be your AOS crapping out on you, or the typical cloud after the motor sits a day or two cold and oil seeps into the cylinders (normal).

[gregdacat]

I changed my oil this weekend, too. Went with Royal Purple 10w-40 because I drive very little during the winter and it does not get super cold around here. IMHO 30 weight is a tad thin for a 986.

I am not getting any smoke like you described. The engine does seem to run quieter compared to my previous fill which was Mobil 1 0w-40.

[Flavor 987S]

Royal Purple is NOT a Porsche approved oil. I hear it is an excellent product, though, and may try it in the future. I am currently using Red Line.

But, only Randal is using the proper Porsche approved viscosity. I would never use a 5W30 in a Porsche engine, and is not an approved viscosity. 10W40 is not approved either, but a safer choice. You will probably notice more lifter chatter on cold start-ups.

And this statement from Violametallic, "... So im assuming this is a good thing and the oil is cleaning out the internals of the engine, am i correct?" is certainly NOT a good thing. You have other issues going on that need fixing.

[Flavor 987S]

Here is an interesting oil write-up. I have zero opinion on the findings or validity:

http://www.animegame.com/cars/Oil%20Tests.pdf

[cnavarro]

You should never use an anything/w30 in your Boxster.

0w40 is the minimum, 5w40 is preferred, 10w40 is equally good for warmer climates, per the earlier Porsche approved oil service bulletins.

[cnavarro]

Originally Posted by Flavor 987S

Here is an interesting oil write-up. I have zero opinion on the findings or validity:

http://www.animegame.com/cars/Oil%20Tests.pdf

The Timken Falex bearing test has largely been discredited as a valid method of testing oils - the Holden/Commodore magazine that published that article later published a retraction.

What the test shows is how much moly is in the oil - oils with a poor score have little or no moly - oils with alot (Royal Purple, Redline) have the best, etc.

The test can also be skewed depending on how you perform the test. Knowing how moly interacts with pressure and wear surfaces, it takes anywhere from say 30 seconds to five minutes for moly to form a new wear surface consisting of "glassy plates" when then are sacrificial. Depending on the pressure exerted on the torque arm and how fast the load is applied, this will affect the amount of moly wear film and it's load bearing capacity.

[Jake Raby]

Black smoke is related to excessive enrichment/ fuel.. Not from oil.