WRONG! Automatics are not bathed in oil. Over half the fluid is in the torque
convertor while the remaining is held in the pan for the valve body and the
clutch packs. The reason why "bathing" the gears is not critical at startup is
there is no stress or load on any tranny gears or bearings when the damn thing
is in park and you're cranking the engine.

Dennis
ASE Certified Master Auto Tech and
Marine Engineer in training

Transmission do not suffer from dry bearings at
engine startup (as the engine does) because the gears are bathed in oil.

there you have it, folks, straight from the denny the fraud's mouth.

denny, go back to study hall. It is not lunch time yet.

Some automotive engines use oil as light as 5W20 in 100 degree F heat and yet
go 100,000+ miles without any oil related problem. Many of todays aluminum
engines have done away with camshaft bearings and are using the lighter oils.

But the weight or viscosity is not the total picture. Much of this depends
on
oil pressure. The theroy on light oils is that it is able to flow faster and
since there is no, or very little oil pressure at start up, pressurized oil
is
able to reach component pasts faster. Since 97% of engine wear occurs at
start
up you can see where this is critical. Lighter oils also disapate heat
faster
thusly the engine runs cooler.

As long as oil pressure is maintained in order to provide sufficient flow
there
will be no discernable wear with using 30wt in an engine perscribed to use
40wt
oil. Heavy weighted oils are used primarily in engines with lower oil
pressures or in extreme operating temps. In using a lighter weight oil you
should see a small drop in pressure, but as long as the engine maintains oil
pressure specs you will be fine.

Dennis
ASE Certified Master Auto Tech
and Marine Engineer in training

OK, so I'm sitting around with the captain and his engineer friend on the
new
boat I'm project managing/co-captaining and we are trying to work out how to
run the same weight oil in the engines, gensets and trannys so we only have
to
fill the clean oil tank with one weight oil and not carry any extra buckets
of
different weight oils with us.
The CAT engines and ZF trannys can use 40W oil as per their specs but the
Northern Lights gensets only recommend up to 30W oil. The CATs could run 30W
but only at 86 deg. ambient air temps. We will certainly be seeing higher
temps
than that.
I tell the capt. and eng. that based on the ambient air temps we will be
seeing
even with the Delta-T fans that if it weren't for a warranty issue I
wouldn't
hesitate to use 40W oil in the gensets.
The capt. and eng. disagree. They start saying that running a heavier weight
oil could cause wear problems and make the engine work harder over time. And
as
an example they compare it to what can happen if you use a heavy weight oil
in
a high revving street/race car. I point out that this is a diesel not a high
revving street/race engine. They back off that point a bit but we still go
round and round in a civil fashion.
In the end we will end up putting 15-40W oil in the tank for the engines and
gensets (as per specs) and keeping some 40W in bottles for the trannys.

But other than the warranty concerns, I'm I missing something here?
Would using 40W over 30W in the gensets with of course changing it at the
proper number of hours and making sure that the ambient temps never get low
really cause any long term problems?



Capt. Bill

denny the fraud opens his mouth yet again.

go back to study hall, denny, it is not lunch time yet.

I don't know where you get your info but I hope you didn't have to give
anything for it. Six years employed by Kerr's Racing in Houston and more
times
than I dare attempt to count did I put 80wt oil in a $60,000 motor. If you
have doubts I can email you an engineering spec sheet. Stick to something
you
know!

Dennis
ASE Certified Master Auto Tech and Marine Engineer in training


From: (JAXAshby)
Date: 6/13/04 11:02 AM Central Daylight Time
Message-id:

Frequently race cars *do* use heavy weight engine oils

no they don't.

Denny, when the hell was the last time *you* saw a marine transmission that had
a torque conventor? When the hell was the last time *you* saw an automatic
transmission that ran on 40W oil?

you are a fraud, dude.


WRONG! Automatics are not bathed in oil. Over half the fluid is in the
torque
convertor while the remaining is held in the pan for the valve body and the
clutch packs. The reason why "bathing" the gears is not critical at startup
is
there is no stress or load on any tranny gears or bearings when the damn
thing
is in park and you're cranking the engine.

Dennis
ASE Certified Master Auto Tech and
Marine Engineer in training

Transmission do not suffer from dry bearings at
engine startup (as the engine does) because the gears are bathed in oil.

Esourcedesigns wrote:

Stick to something you know!

Teflon Jax, he couldn't stick to anything in that case.

Rick

JAXAshby wrote:

Continental. Lycoming.

Jax, as usual you are skittering along like a slimeball, all you have
done is name a couple of engine manufacturers.

Please tell us what make and model of aircraft engine requires, or even
has the facility to prelube before starting.

I won't hold my breath waiting for you to answer. You usual one-line
insult post will prove my point that you are an ignorant wannabe who has
no life outside usenet.

Rick

Esourcedesigns wrote:

Stick to something you know!

Teflon Jax, he couldn't stick to anything in that case.

Rick

I do know a fraud when I see one. In this case, two frauds, rickie sluggs (the
bogus ATP) and whothehellever the clown ecsourdesigns is who is trying to get
rich on the net selling moly oil or some such

rickie, fine fine fine pilot that you claim to be, have you EVER noticed that
preluber mounted on the front of those engines?

Next time you drive by an FBO (look up the term) slow down a bit -- stop if you
have to -- and LOOK.

JAXAshby wrote:

Continental. Lycoming.

Jax, as usual you are skittering along like a slimeball, all you have
done is name a couple of engine manufacturers.

Please tell us what make and model of aircraft engine requires, or even
has the facility to prelube before starting.

I won't hold my breath waiting for you to answer. You usual one-line
insult post will prove my point that you are an ignorant wannabe who has
no life outside usenet.

Rick

sorry, gene, you are only partly right. yes, that is a propeller, but no it
does not scrub the oil off. you pull the prop through many times (or crank
over with the mags turned off) to bring the oil pressure up to pressure to lube
the bearings before startup.

At least that is what pilots who care about their engines do. That is a little
beyond the conprehension of some pilots to be sure, but not the vast majority.

Jax, that pre-luber mounted on the front of the engine is called a
propeller and it will move the pistons up and down in the cylinder to
check for liquid lock. It will NOT prelube the engine, in fact, it
will scrape the oil off of the cylinder walls since there is no splash
or spray lubrication to restore what the scraper ring removes....

There are STCs to install a small electric motor and pump on the
firewall for the purpose of prelubing... it is not from either
Lycoming or Continental and it is not visible from the front of the
aircraft.

There are STCs to install a small electric motor and pump on the
firewall for the purpose of prelubing.

that is for pilots who know their engine needs prelubing but at just too lazy
to pull the prop over.