Originally Posted By: Frank
Auto-Rx cleans the seal material front & back (we don,t swell anything as swelling a seal weakens it)
Molakule (from one of the helpfully-linked threads) seems to contradict that statement:
Originally Posted By: Molakule
These are all seal conditioners, which work by one or more of these methods:
1. Cleaning the seal,
2. swelling the seal slightly by replacing elastomer molecules.
In 1980, Lubrizol patented a seal swell additve using "beta-thiopropionitrile" chemical which replaces the nitrile atoms lost to wear, oxidation, and sludge encroachment.
In addition, the ester di(2-ethylhexyl)-adipate (a di-ester), or similar ester equivalents, are often added to PAO and Group III base fluids, at about 5%, to improve seal swell.
My understanding is that seal conditioners and swelling agents are a necessary and benevolent part of most modern motor oils and that any oil (or probably any petrochemical) will have either a nominally shrinking or swelling effect.
Auto-Rx cleans the seal material front & back (we don,t swell anything as swelling a seal weakens it)
Molakule (from one of the helpfully-linked threads) seems to contradict that statement:
Originally Posted By: Molakule
These are all seal conditioners, which work by one or more of these methods:
1. Cleaning the seal,
2. swelling the seal slightly by replacing elastomer molecules.
In 1980, Lubrizol patented a seal swell additve using "beta-thiopropionitrile" chemical which replaces the nitrile atoms lost to wear, oxidation, and sludge encroachment.
In addition, the ester di(2-ethylhexyl)-adipate (a di-ester), or similar ester equivalents, are often added to PAO and Group III base fluids, at about 5%, to improve seal swell.
My understanding is that seal conditioners and swelling agents are a necessary and benevolent part of most modern motor oils and that any oil (or probably any petrochemical) will have either a nominally shrinking or swelling effect.