Jeff,
If these lighter oils are better at dissipating heat, then wouldn't
they be useful to many of us who have trouble keeping the temperature
gauge out of the red on hot days sitting in traffic? Like I said, I'm
running 5w50 synthetic, and I now see (along with using my auxiliary
electric cooling fan mounted on the front of the rad) that my temp
gauge never gets about 5/8 or so even when idling in traffic for long
periods of time in 95+ degrees (very hot and humid here in the Philly
area). If I'm cruising, I can go at 85+ mph all day long in any kind
of heat and never see the temp gauge over 3/8. Maybe the synthetic has
something to do with this? I don't run an oil cooler, by the way.
Tim Holbrook
1971 TR6
--- Jeff Johnson <jguy@erinet.com> wrote:
> From: Timothy Holbrook <tjh173@yahoo.com>
>
> Tim:
>
> One of the reasons Honda specs 5w30 is for gas mileage, but the more
> important reason is that it dissipates heat much better that any
> other
> weight oil. Very important in todays' cars that run at much hotter
> temperatures than our older cars. When Eddie Hill was setting records
> in
> the Pennzoil sponsored top fuel dragster, he ran 5w30 Pennzoil and
> asked
> Pennzoil if they could develop a 0w30 for him. They didn't, but the
> anecdote gives you an idea of how important heat dissipation is. To a
> person brought up with heavier weight oils, I shudder at the thought
> of
> a 5w in my Triumph, but I'm more than happy to put it in my wife's
> new
> Ford.
>
> Cheers,
>
> Jeff Johnson
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