OT GM AND SYNTHETIC OIL

winter and 5w30 SYNTHETIC has much better cold start flow characteristics
down to -45*F than #10, which in anybodys` mind gives instant better
lubrication, on COLD startup,where90% of engine wear occurs.....5w is
inherently thinner down to that temp.

ed/ontario

 

Ed,

Where exactly are you located? I am close to Pickering, Ontario and the
coldest I have seen is -25 last January. I use Mobil 1 5W30 and find that
when I start the car, the engine feels very lubricated as if its been warmed
up even though it was a cold start.

I think Mobil 1 5W30 for winter and Mobil 1 10W30 for summer should provide
ample protection in our climate.

Cheers,

Aziz

PS. Can you email me your address so I can write to you outside of the
newsgroups

 

Its obvious you live in a climate that resembles paradise ? here in Canada
when you get 10*F or colder you need a light oil for startup purposes , to
prevent excessive wear ,Sure once it warms up ,and it does take a long time
in that temperature, the oil will revert to #30

ed/ontario

 

Car Guy resides in Toronto, Canada.

I use the term Winter since the 5 grade oil will have better circulation in
cold. This is what I was told by Mobil engineers

 

better the flow characteristics.
Compare a 10 or 15 w oil to molassess or corn syrup at that temperature(10*F
or lower ) and you get the picture.
ed/ontario

 

I think you may have read the post incorrectly Huw? the post means that 5w30
flows better at lower temps . not neccessarily at higher temps.

ed/ontario

 

COLD!!!! the coolant will warm up sufficiently but the oil will always be
colder because of its location in the pan and the fact that ambient is
cold.The oil does cool the engine too. ...and most times in severe weather
here rad covers are used to keep the engine hot at normal opertaing temps.
and no they never over heat in _*F temps.
ed/ontario

 

In --

~~Philip "Never let school interfere
with your education - Mark Twain"

What happened to the 5w-30 vs. 10w-30 comparison? What am I to infer
from comparing 15w oil to molasses or corn syrup? Is the syrup HOT
and the oil cold for this comparison? What? Migh 5w-30 and 10w-30
be a distinction without a meaningful difference?

 

In

I still own 2 grille covers from International cabovers I used to
drive. LOL For a diesel (which produces little heat under no load),
then grille covers make sense. For gasoline engines..... eh,
gasoline engines introduce much more heat to the cooling system under
no load. While I've driven plenty in temperatures in the 0-20
degree range, you people who LIVE in that sub zero stuff can have it
all!!

 

Heh... Go browse through some of the UOAs on BobIsTheOilGuy. The M1 0w-40
is actually the least stable out of the whole M1 lineup. It thins out to a
30-weight within 5K miles. And then it begins to thicken back up, but these
fluctuations aren't good for the reasons I mentioned before.

Cheers,

Pete

 

Get real Pete. The 10w/40 along with the 15w/50 are the only ones to
meet even ACEA A2 and A3 and also MB229.3 standards for ultra long
drain oil. Your information is wrong. It is also the only multifleet
Mobil to meet BMW LongdrainII.

Huw

 

It would appear that you live in a warm climate Phil.
Let me say that unless an oil is totally synthetic, regardless of weight ,
the colder it gets the thicker it gets .A lighter oil starts out lighter is
all, therefore giving better cold start protection becuse the flow
characteristics are better .

If you want to get into totally synthetic argument ? then according to the
information on the Mobil 1 container it doesnt even begin to gell until the
temperature reaches -45*F,regardless of grade /weight.

ed/ontario

 

Philip:

When is the last time you started a car, three or four mornings running,
at -15 to -20 F, and driven the 8 minutes to work, shut it off and
repeated same in the evening? Engines, under such use, never reach
operating temperature (ie warm up).

I rarely have heat from the vents before I pull into my parking space.

There are many such vehicles in this country! Our biggest metropolitan
area has only 4,628,883 people (Greater Toronto Area). Most of us live
in small cities (you may say villages |>)) ), and never see a traffic jamb!

Dan

 

It does that by design. Going out of grade by one notch is not serious, but
perhaps not ideal. The viscosity/HTHS ratio is not as good as some others,
but that is only one aspect of many.

That site is sort of interesting, although I don't take the comments seriously.
Wringing hands over a few parts per million of wear metals is stupid.
Suggesting someone to change the oil when the viscosity and the TBN are
still fine is lousy advice, but it happens constantly there.

The site is an excellent example of anal retentiveness.

 

In

Hey.... post a link to the particular passage that claims Mobil1
0w-40 degrades in the manner you suggest.

 

In

Dan: I have never in my life inhaled air that cold, let alone
"live" in it. Are you NUTS! Get the hell out of there! I can only
imagine that less than 10 minutes of operation would not result in a
thorough warm up. Your point is made. I'll take the smog, traffic
jambs, drive-by shootings, high taxes, expensive housing, illegal
aliens, and whatever other negatives I can pull out of thin air about
southern California ... over dealing with YOUR temperatures and
everything flowing from such cold. BLAH! You're in serious denial
if you think you're "living." Is there a barbed wire fence with
armed guards around your "villiage?"

(this is all in fun... don't take it personally).

 

http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=3;t=000379

Cheers,

Pete

 

There is no M1 10w-40.

The fact that the 0w-40 and 15w-50 have some certifications on paper doesn't
mean as much to me as real world used oil analysis which shows exactly what
happened to the oil after it's been run in the engine for some time. UOA is
a fact. Deal with it.

M1 10w-30 is the most shear-stable M1 oil. M1 0w-40 is the worst in that
respect.

Cheers,

Pete

 

Philip:

I knew it was in fun, I wrote my part expecting no less.

I have been to many parts of this world and wouldn't move for love nor
money. Constant sex, maybe, but not for love.

|>))

Dan

 

That's what I've read as well. By what's the point of that? There are
other oils out there that don't shear as much as M1 0w-40.

Agreed. Some of the people there are splitting hairs.

There are other things to consider, such as amount of insolubles.

Heh... yeah... we all have our fixations. The reason I mentioned BITOG is
because the UOAs posted there clearly show that M1 0w-40 is the worst in the
whole M1 line-up in terms of shear-stability. Still, not a bad oil for what
it costs. I'm using it now in my car right now, but will probably switch to
something else come next oil change.

Cheers,

Pete