[V8] Maximizing Fuel Economy

[dsaad at icehouse.net]

If you totally blocked off the oil radiator/cooler - does the temp go up to
normal?
I think this would be a pretty safe test since the oil cooler doesn't even exist
on most cars.
This could prove out your theory about the thermostat without having to buy one
- and I assume they are not cheap.

btw, what is "normal" oil temp?

I really notice my mileage going down in cold weather, and it seems my oil temp
is below the bottom 1/4 of the guage most of the time - although I really don't
watch it that much. Perhaps I have the same problem?


Dave

Quoting "Buchholz, Steven" <Steven.Buchholz at kla-tencor.com>:

> I've been contemplating the same thing ... funny, I've got two
> ostensibly identical cars, neither is generating any codes.  My first
> car seems to do pretty well on fuel (for a V8) ... I see mid 20's on the
> freeway.  The other car seems to barely crack 20.  Neither car is
> generating fault codes.  Both cars seem to have properly functioning
> coolant thermostats, but the one getting the worst mileage seems to need
> a thermostat for the oil cooler.  On that one the oil temp barely gets
> up to the min operating range on the gauge.  I've already done the OXS
> and FPR ... I was thinking about the coolant temp sensor too.  That
> second car is due a smog test ... so it will be getting a tune up ...
>
> Anyone else have any ideas for what might be different?  The second car
> has an engine from an automatic in it.
>
> Steve B
> San Jose, CA (USA)
> >
> > Funny...I'm going through this same thing right now (but with Bosch
> 3-wire)
> > on the '93.  I'm guessing that the coolant temp sensor at the back of
> the
> > pass. side (USA) head is not functioning properly.  Will replace and
> see
> > what happens.  Figure a 20-30% improvement in fuel mileage will help
> with
> > the possible $4/ gallon fuel they're anticipating...
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