Originally Posted by oil_film_movies
Don't add much of this, but some Berryman's half way through an oil change interval or so can boost the degraded additives:
from a previous thread:
Originally Posted by oil_film_movies
Originally Posted by MolaKule
Petroleum Oil... 64742-65-0... 45-55% (Group II neutral oil)
Polybutylene Succinimide confidential... 9-12% (VII and dispersant)
Dialkylated Diphenylamine... 68411-46-1... 6-10% (Antioxidant)
Zinc Dialkyl Dithiophosphate proprietary... 2-5% (ZDDP - Anti-Wear)
Organomolybdenum Complex proprietary... 1-2% )(MoDTC, friction Modifier)
All of the above will be found in engine oils off the shelf.
The main point of Berryman Engine Oil Extender is to be added halfway or so through a long oil change interval, not to replace engine oils.
This way, the high concentration of AW, FM, AntiOx, VII, and dispersant will help replace some of the additives in the original oil fill that break apart, chemically change, degrade with age and exposure to acids, heat, and pressure, etc.
Sure engine oils have these chemicals, yet not in near the concentration as Berryman.
For example, at 1% moly, that's 10,000 ppm, which would only require 1.6 oz (a small fraction of the bottle) in a 5-quart sump to about double the amount of moly in the oil!! Most syn oils have about 80 ppm, and 1.6 oz of Berryman will add 100 ppm to that. ... ZDDP and the other chemicals needed, similar results.
Does Berryman's Oil Extender also have a full DI package, meaning metal inhibitors, detergents, and corrosion inhibitors? No it doesn't. It has an ashless dispersant in it but how much is enough?
Does Berryman's remove metal particulates that causes catalyzation with metals that leads to hyperoxides and oxidation, etc? No it doesn't and that's why we do oil changes.