Effects of using the wrong oil

[BrocLuno]

It's Polyisobutalene, same as the old STP oil treatment. Same as the most inexpensive viscosity modifier from back in the 1960's ... It's nothing new. It shears rather quickly and is of little use. It does have an inverse temp coefficient, so it will "stabilize" the oil in that it will remain thicker (somewhat) as it gets hotter. But that is all.

You can usually buy the same stuff in gallon jugs at truck stops (big ones) to dump in tired old diesels for a fraction of the cost of Lucas. Truly is "snake oil", but not a new one, just a repackaged old one ...

 

[BrocLuno]

OTOH - Lucas does sell a nice synthetic 2-stroke oil that meets JASO FD and APT TC for use in high speed, high load 2-strokes like chain saws.

So Lucas is really a mixed bag. Some real snake oil, and some decent products. You just have to shop carefully ...

 

[Dyusik]

Originally Posted By: SubieRubyRoo

Stabilizes? How so?


Stabilizes the excess amount of money in the wallet of the person shopping for oil.
Destabilizes proper grade viscosity, winter rating and additive package.
What else I miss?

 

[Overfill]

Originally Posted By: SubieRubyRoo
Originally Posted By: Brian553
Stabilizes the high temperature viscosity when such an environment to the oil would challenge it.
Unique in its ability (tackifier additive) to help oil cling to metal surfaces in the event of that area having low oil flushing or fling off of oil
more often for the layman, it's used to raise the grade of oil in a pinch to stop blow-by or rod-knock, limping a near-death car to it's grave... or a repair shop
BITOG's favorite "snake oil"


Stabilizes? How so? It's as thick as vacuum tower bottoms leftovers, has no additives and does not boost TBN. All it does is dilute the good oil in the sump. It's also been proven to entrap air in the oil and I'm pretty sure everyone knows air does not lubricate two metals sliding against each other.

I'm actually kind of amazed that Lucas hasn't been hit with a class-action lawsuit yet about their false claims on it.


They say 'stabilizes' but I feel like the best description is that it re-establishes the high-temperature viscosity if/when the oil shears... but their proportioning is way over the top. Frankly, looking at UOAs (although I can't say I've looked at that many, compared to the veterans on here) I don't see passenger cars and their oils shearing down that much in the owner's OCI--at least not out of grade. Maybe this is different for big rigs, hence where they market the stuff? What I can say is that shared-sump vehicles challenge shear a lot.

Air entrapment is just one of the letdowns of Lucas....
also, not to mention the air entrapment really works against diffusing heat.

also also, according to MolaKule (and as far updated information--please link most updated info): https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=197639

Originally Posted By: MolaKule
I do not believe that LOS is anything more than an olefin co-polymer with a tackifier. I would not even use it as an assembler lube since it does not have enough AW additives.

And BTW, thanks for your service to this country.