Anyone ever run Royal purple engine oil?

[Lingwendil]

[deprivation]

Also, Castrol Syntec 20/50 supposedly has enhanced ZDDP levels - they even claim the oil is appropriate for "Classic Cars" with flat tappets. I ran Royal Purple for a while and I noticed very stable oil pressure, more so than with Castrol "High Mileage" non-synthetic oil. I have stuck with Syntec because of the ZDDP thing and the price isn't too bad compared to Royal Purple.
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1986 Westy 2WD auto a.k.a. "The Old Girl"
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[Perales]

[RCB]

[Lingwendil]

Anyone happen to know the zinc content of Royal Purple 10-30, or 10-40? I've been contemplating using it in the 1600 build I'm starting for my beetle.

[Wildthings]

[sagebus]

Hey all. Back in Feb. of 2008 when this thread started. Stan, known here as Multimac posted an article from his local newspaper about a company that sells oil with high z& p content for classic cars . The website says it is not to be used on a vehicle with a catalytic converter. Stan said back in 2008 that he would use this Hi-Z classic motor oil in his Vanagon. That it is cheaper to replace the Cat. than an engine. Stan / Multimac, if you are still out there, how is the Hi-Z classic working out for your van ? www.motorheadoil.com Anyone use this oil before? What do you think...
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1984 Vanagon GL, Wolfsburg Westy 1.9 ltr

[tencentlife]

No, the zinc isn't floating around by itself. It's a component of the molecule ZDDP, which is in solution. Z and P make up this compound, which is why you always see the elemental Z and P go up or down together. When two metal surfaces come in direct contact, this compound has the unique property of reacting to that by plating the surfaces with zinc. The P is freed in that reaction, presumably.

The ZDDP is in the oil and gets used up bit by bit. The content in the oil determines how long the oil can be used while still having sufficient anti-scuff protection. When it is in too low a concentration that protection diminishes and then when scuffing occurs there is damage to the surfaces. Once the smooth finish is marred, the damage tends to continue at that site, snowballing.
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[morymob]

If the additive is used at oil change time wouldn't the filter remove some,after all it is a 'Zinc' particle isn't it??

[Wildthings]

http://www.buyersguide.com/EngineOil/Automotive/pdf/CastrolSYNTEC.pdf

Scroll down and look for the 20w-50, its meets SM and GF-4 standards. I was able to find the zinc content for other Castrol oils, but I could not find the data sheet for the 20w-50.

This website gives information on the standards as of 2004. I assume that the information is still relevant.

http://www.lubereport.com/e_article000229004.cfm

Option 2, the chosen option, limits zinc to .08% for GF-4 compliant oils.

[RCB]

Not long ago I spoke with a gal named Lisa over at Castrol and she said the Castrol Syntec 20/50 has 1200 PPM of zinc in the formula.
That was the "rough " estimate she could give me...propriatory secret prevented her from revealing any other information on the zinc content.

She did warn me that because the synthetic formula has such cleaning abilities...any oil leaks would most likely become more severe because the detergents will clean away any gunk that has acted as a "plug".

I found she was kinda iffy on answering questions about using it on a rebuilt motor but she was quite sure it was OK for an original motor.

Calling around and speaking with engine builders quite a few of them said that one half bottle of STP red in an oil change would give you about the same results as the Synthetic oils would and the cost was no where near the cost of the Castrol Syntec 20-50.

[tozovr]

Be interesting to see as the site linked has this asterisked

[Wildthings]

[tozovr]

I just waded through this and many of the other posts and pehaps I missed some basic things so be kind

Would this not do exactly what is required? The Syntec Classic blend...
http://www.castrol.com/castrol/genericarticle.do?categoryId=82915470&contentId=7032644#top

And for those adding the STP Red, how much per change? Whole bottle?

Thanks guys...

RJ

[Mr. Electric Wizard]

I ended up buying a case of Brad Penn 20W50 partial synthetic (all their oil is partial).
I should be good to go, after all, it's green.
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[jalopyjockey]

just a heads up for yall.....pepboys has discontinued sales of rp 15w-40 and is selling it at $4/qt....ive been trying to find a more recent analysis than charles' at ln but with no luck...emailed rp last night and they were very prompt with the replies, but wouldnt discuss the blending or packages since its proprietary, also didnt provide an msds...david stated that ci-4 zinc content is capped at 1300ppm but should not be the deciding factor for wear protection, its all in the package, but if your looking for more zinc out of their lineup the xpr has 1600ppm zn

[badgerb0b]

Since I cannot find Royal Purple where I live.

Redline 10w-40 looks like it is well suited to flat 4's with lots of ZDDP.

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=478218#Post478218

Has anyone used this stuff before?

[Wildthings]

Oils that have a W number of 15 or higher can be made with more zinc and still meet the SM standard, while oils with 0,5,10 W numbers (like 10W-30) can not. It is the GF-4 standard which really kills the zinc. An oil like Royal Purple does not meet SM specs at all, at least the bottles I looked at this past week didn't.

Here is a good link http://www.lubereport.com/e_article000229004.cfm

As of 4/7/09 Mobil 1 Turbo Diesel and Mobile 1 15/40 still had 1200 and 1300 PPM zinc respectively. But I noticed just last week that the Mobil 1 Turbo Diesel oil was now labeled differently so I grabbed the oil stock from the back of the shelf when I bought it. The old stuff did not meet SM standard while the new did.

http://www.mobiloil.com/USA-English/MotorOil/Files/Mobil_1_Product_Guide.pdf

[tencentlife]

All the wbx engines, and the inline OHC engines, gas and diesel, are 2-valve, flat-tappet.

Mr. EW, that post was awhile ago, and things change, but RP markets to more of a racer/tuner crowd and seems less concerned with having the latest API standard, so they probably haven't dropped their ZDDP levels. Not using their products myself i wouldn't know, so to be sure you should contact them, or look up their product data sheets. Or look up your product at the BobistheOil Guy.com VOA forums, or LN Engineering's oil page.
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Please don't PM here, I will not reply.

Experience is kryptonite to doctrine.

[jdbs3]

1990 Vanagon GL

I've been reading with interest the various threads on oil, their zinc diethyl dithio phosphate (ZDP) content, and the importance of using such oil.

Possibly it says somewhere in my Bentley, or in one of these threads - Do all vanagons have flat tappet engines? Or more specifically, do 1990 vans have such engines?

thanks,