pentosin coolant

Phil Rose pjrose at
Tue Aug 20 20:52:20 EDT 2002

Your use a 1:2  glycol/water dilution (instead of 1:1) is more than a
"possible factor". Now your coolant contains a larger proportion of
the higher heat-capacity component, i.e., water. Methinks there's no
green magic here.


At 6:21 PM -0400 8/20/02, Brett Dikeman wrote:
>I've heard it before, but always said "pshaw" to the claims that
>Pentosin coolant drops engine temps.
>In heavy traffic today driving the car hard, both A/C on and off(on
>half the trip, off the rest), temps never exceeded the
>slightly-left-of-center mark...and it took a -long- time to get
>there.  OAT was around 80-85.
>It very well could have been the flushing that has improved system
>operation- I had neglected it severely(my coolant came out a rather
>dirty brown, fair amount of debris, etc), so take all of this with a
>grain of salt.  I'd be interested to hear from anyone that had a
>system -in good shape- that switched from green stuff->pentosin; did
>you notice a difference?
>Pentosin does state on the bottle that it'll drop temps a few
>degrees; the claims are similar to Redline's Water Wetter, so one
>can't help but wonder if Pentosin contains a similar agent already
>'built in'.
>Another possible factor is that I did a coolant:water 1:2 mix(instead
>of a 1:1) since even 1:2 protects to temps well below what's normally
>seen here in the Boston area.  I will spike it if I go to the winter
>driving school, though...
>Anyway, considering that its something that needs to be done every
>two years, and the difference between Pentosin and "the green stuff"
>isn't that great, I say, why not?
>"They that give up essential liberty to obtain temporary
>safety deserve neither liberty nor safety." - Ben Franklin
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Phil Rose
Rochester, NY
mailto:pjrose at

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