[AT] STP

[Ralph Goff]

Larry D Goss wrote:
> We've been around and around the STP question on another tractor list. 
> We're not concerned about using it in engines as much as we are for 
> transmissions.  If you look through the writings that the company puts 
> out, they don't recommend anywhere that it be used full strength.  
> Somewhere in the material, they say to use it at a maximum strength of 
> 50%.  What I'm doing is mixing it half and half with 80-90 hypoid oil.  
> It does wonders for quieting noisy gear trains.  I'm using it as a 
> substitute for a special blend that includes STP, gear oil, and 
> Bentonite.  One of the concerns of using STP in cold climates is the 
> problems of flow at low temperatures. Apparently that's one of the 
> reasons for the 50% maximum concentration level.  Don't ask me what the 
> real blend is supposed to be.  It's one of those trade secrets like the 
> recipe for Coca-Cola.

Larry, as I recall STP it only recommended adding a container which if 
memory serves me was about half a pint? at oil change. That would be 
fairly low percentage in a 5 quart engine but still enough to have some 
benefits.
I recall many years ago adding STP to an engine in winter time and it 
was so stiff it would not even come out of the container until I heated 
it up on the stove.

Ralph in Sask.