jlrz28

iTrader: (7)

Here is the specs 2000 Z28 Camaro, 110K miles, all the bolts ons, a cam. Nothing in the motor has been touched other than the cam, pushrods, and springs. It is daily driven 400-600 miles a week. I have been using Royal Purple since 50k miles. Usually run 10w30 and during this interval needed to add oil and only had 5w30 Royal Purple so I added 3/4 of a quart. Here are the results.....

rollinna65

iTrader: (18)

So is it good, bad or average?

SSDude

Could you please type in the numbers? They were not clear. Your lead looked a little bit high for the miles you drove. However, this is nothing to panic about. However, it looked like this oil sheared down to a 20wt. Please type in the figures for lead and viscosity if you want an accure read. Do you have a lead foot?

98 camaro

more info......I always use RP and would like to know some details

jlrz28

iTrader: (7)

Info is now typed out

SSDude

Oveall, the UOA looks ok. Your insoluable are low. However, the regular 30 wt Royal Purple (5w-30 and 10w-30) tend to shear down to a 20wt. Redline and GC are better oils and are more shear stable. If you must use Royal Purple, Royal Purple Racing 21 and Royal Purple Racing 41 are better oils in my opinion because the tend not to shear under normal useage.

Patman

The lead is a little high, and that's most likely due to the fact that Royal Purple thinned out so much. That is why I don't recommend RP 5w30 or 10w30. If you use RP, go with their racing 41, which is like a 10w40 and does not thin out like this.

jlrz28

iTrader: (7)

I also have been using additives in the fuel at every oil change because of problems in the past with injectors. This in point might have someting to do with the lead content.

mvonada

Would be nice to see a comparsion between Royal Purple and Mobile 1

jlrz28

iTrader: (7)

This is what i got back from the lab after I told them the additive I was using


Hi Jason,

Lead isn't really all that high, and if I had written the report I probably
would not have even mentioned it. I don't think it's coming from an
additive, but if you wanted to know for sure, you could stop using the
additive and see if lead drops. I think it's more likely that lead is above
average because you're running longer oil changes than average (average is
~4000 miles). Anyway, lead isn't high enough to worry about. If it
increases, we'll let you know.

SSDude

The high lead most like is the result of your oil thinning and running the car at high speeds. Royal Purple Racing 41 would be the best oil for your application.

Patman

That answer he gave is wrong! Longer oil changes do not give you higher lead if you're using a good oil. I went 9000 miles on my last interval with German Castrol and only saw 2 ppm of lead!

For comparison, here are the rest of my numbers from that analysis:

Iron-11
Lead-2
Copper-2
Aluminum-5
Chromium-0
Nickel-0
Titanium-0
Silver-0
Silicon-11
Viscosity-12.4 cst at 100c (12.5 would make it a 40wt)
TBN-5

jlrz28

iTrader: (7)

Would fuel additives have anything to do with that?

David Gordon

iTrader: (1)

I have been using Royal purple as well in 2 of my cars. I work in the oilfield and we use thier oil in our industrial engines, we went from changing the oil every 750 hrs. to every 10,000 hrs. We sent in samples every month and this was what they came up with. It was actually going well over 10,000 hrs but we had to draw the line somewhere! This was using their 30 wt. oil.

dailydriver

The additives could have helped along the shear down of your oil. By promoting cylinder wall "washdown", getting into your crankcase and diluting your already too thin (to start with) oil. Does this sound about right, Patman (depending on how much/how often he used the additives)?

jlrz28

iTrader: (7)

I was adding fuelsystem\injector cleaner every oil change. I always run Chevron which also has techron in it.