If you go 1 qt of this Rislone stuff and 5 qts of regular oil (assume 800 ppm zddp). Then 5000 - 800 = 4200. 4200/6 = 700. And finally 800 + 700 = 1500 ppm in your crankcase. That is comparable to the level in Redline Oil. I woudl go half bottle of Rislone in the crankcase which would be 4200/12 = 350 and 800 +350 = 1150 ppm, which is comparable to the old SL rated oil zddp levels.

The most recent repsonse from ZddPlus:

" SO for 4 liters, and using 900ppm phosphorus oil it would take 1 ounce of ZDDPlus™ to bump the sump ZDDP level to the Alfa’s API SG (1200ppm) recommendation.



Regarding the issue of whether the additive package is compatible with ZDDP, it already is: because ZDDP is already in the oil, and you are only changing the amount by 20%. I have heard people outside of the industry theorize about some critical “balance” which can be upset, but there are several realities which disprove this speculation:



1) The level of both ZDDP and detergent declines from the first time you start the engine after the oil change. If the exact level of available chemical was critical, the oil should then stop protecting the engine soon after the change…it does not.

2) The additive package formulators (not the oil companies, the companies that the oil companies buy the additive packages from) publish dosing charts showing how to mix and match the different packages to achieve different results. If the additive manufacturers encourage custom formulations from the stock additives, then…

3) In order to be type approved, every oil must be able to be mixed with any other type approved oil with no dire consequence. Have you ever heard of problems with someone merely mixing two oil types? We have not seen any documented cases of this ever happening. Talk a bout a custom formulation!



Thank you for your continued interest in ZDDPlus™.

Howard Hoyt
Dir. of Engineering
AMI, LLC

verslagen1 wrote on 07/13/16 at 08:57:54:


Why are you still messing around with Rislone?  Here is a blanket general sort of statement, your clutch in your Savage can react adversely to friction modifiers and any form of long polymer thickness additives  --  modifiers that are used in MOST of the off the shelf automotive ZDDP booster products and/or any STP type of product.

What we want is pretty much pure ZDDP -- it comes in little bitty tiny bottles or diluted in a good Redline synthetic carrier oil that has to be SHAKEN VERY WELL each time you use it (and it needs to be stored inside where it is air conditioned).

Read the ZDDP booster thread in Tech Section, it refers back to several older oil wars where all this sort of stuff was discovered, researched and codified.    And now the newest of that knowledge has been extensively tested by list members for pushing 6-8 years now.  

And we keep testing and probing as our oils continuously shift underneath us ......