As promised here is the analysis for Rislone.
Oil Brand/Weight : Rislone additive
Type Equipment : clean oil
Miles/Hours on oil : clean
Total Miles/Hours : clean
Results ppm/% Comments (blank=normal)
TBN 5[email protected]
C (cSt) 9.2 SAE 20w
This is the Rislone "Add at Oil Change" additive found in the Yellow bottle, and cost's approx. $2.29 at Walmart. The oil is dyed blue/green. As you can see it is nothing more than a 20 weight mineral oil with very low levels of calcium detergent, some anti-foam, and very low levels of ZDDP, about 1/4 to 1/5 of the level you would find in an SL formulated motor oil. The level of detergent is too low to really affect cleaning. Any "run-of-the-mill" OTC motor oil will contain much more detergent than this brew.
Advantages to using this OTC additive? None whatsoever.
Disadvantages: 1.) Cost. In my view it should cost less than Walmart's Oil Additive in the blue bottle ($.78), since Rislone contains less ZDDP. 2.) Thinning of the crankcase oil. If I had an engine spected to run 30 weight oil this additive would thin it down. Testing revealed no viscosity index improvers (VII's) to keep the oil from thinning down.