CRWLR

From all that I have found, 10W30 is better for warm climates than 5W30.
5W30 is better for cold climates than 10W30.

I agree that 30 is 30, but apparently there is something with theformulation
that tends to cause changes.





"Mike Romain" <romainm@sympatico.ca> wrote in message
news:40747D6D.84B59490@sympatico.ca...
> Or hot.... Just better for cold.
>
> 30 is 30 when hot and that is what either oil is rated for at 100C.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
>
> CRWLR wrote:
> >
> > 5W30 is OK for cold climates.
> >
> > "Matt" <mhammer8@yahoo.com> wrote in message
> > news:3a3f4978.0404062031.45633962@posting.google.c om...
> > > I Googled this here and found lots of conflicting data, so let me tell
> > > the story:
> > >
> > > I got my 60,000 mile checkup done on my '99TJ 3 months ago at a
> > > dealer, with oil change included. Yesterday I went to change the oil
> > > and my drain plug had been crushed and totally stripped (the head, not
> > > the threads) apparently by an air wrench.So I took it back today and
> > > the dealer replaced the plug, and in so doing also changed the oil. My
> > > question: they used 5W30. I usually use Syntec 10W30. I noticed the
> > > sticker and asked the guy, and he said they use 5W30 all the time in
> > > TJs. (Apparently they use air wrenches to change oil, too, so I don't
> > > trust their judgment) They're a Jeep dealer, mind you. I live in
> > > Virginia and it gets hotter than hell in the summer. Is this safe?
> > > Isn't 5W30 too thin? Or am I worrying about nothing? If it is too
> > > thin, is there an additive I can toss in instead of another changeout
> > > for the next 3,000? Thanks in advance.
> > >
> > > Matt

CRWLR

From all that I have found, 10W30 is better for warm climates than 5W30.
5W30 is better for cold climates than 10W30.

I agree that 30 is 30, but apparently there is something with theformulation
that tends to cause changes.





"Mike Romain" <romainm@sympatico.ca> wrote in message
news:40747D6D.84B59490@sympatico.ca...
> Or hot.... Just better for cold.
>
> 30 is 30 when hot and that is what either oil is rated for at 100C.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
>
> CRWLR wrote:
> >
> > 5W30 is OK for cold climates.
> >
> > "Matt" <mhammer8@yahoo.com> wrote in message
> > news:3a3f4978.0404062031.45633962@posting.google.c om...
> > > I Googled this here and found lots of conflicting data, so let me tell
> > > the story:
> > >
> > > I got my 60,000 mile checkup done on my '99TJ 3 months ago at a
> > > dealer, with oil change included. Yesterday I went to change the oil
> > > and my drain plug had been crushed and totally stripped (the head, not
> > > the threads) apparently by an air wrench.So I took it back today and
> > > the dealer replaced the plug, and in so doing also changed the oil. My
> > > question: they used 5W30. I usually use Syntec 10W30. I noticed the
> > > sticker and asked the guy, and he said they use 5W30 all the time in
> > > TJs. (Apparently they use air wrenches to change oil, too, so I don't
> > > trust their judgment) They're a Jeep dealer, mind you. I live in
> > > Virginia and it gets hotter than hell in the summer. Is this safe?
> > > Isn't 5W30 too thin? Or am I worrying about nothing? If it is too
> > > thin, is there an additive I can toss in instead of another changeout
> > > for the next 3,000? Thanks in advance.
> > >
> > > Matt

CRWLR

From all that I have found, 10W30 is better for warm climates than 5W30.
5W30 is better for cold climates than 10W30.

I agree that 30 is 30, but apparently there is something with theformulation
that tends to cause changes.





"Mike Romain" <romainm@sympatico.ca> wrote in message
news:40747D6D.84B59490@sympatico.ca...
> Or hot.... Just better for cold.
>
> 30 is 30 when hot and that is what either oil is rated for at 100C.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
>
> CRWLR wrote:
> >
> > 5W30 is OK for cold climates.
> >
> > "Matt" <mhammer8@yahoo.com> wrote in message
> > news:3a3f4978.0404062031.45633962@posting.google.c om...
> > > I Googled this here and found lots of conflicting data, so let me tell
> > > the story:
> > >
> > > I got my 60,000 mile checkup done on my '99TJ 3 months ago at a
> > > dealer, with oil change included. Yesterday I went to change the oil
> > > and my drain plug had been crushed and totally stripped (the head, not
> > > the threads) apparently by an air wrench.So I took it back today and
> > > the dealer replaced the plug, and in so doing also changed the oil. My
> > > question: they used 5W30. I usually use Syntec 10W30. I noticed the
> > > sticker and asked the guy, and he said they use 5W30 all the time in
> > > TJs. (Apparently they use air wrenches to change oil, too, so I don't
> > > trust their judgment) They're a Jeep dealer, mind you. I live in
> > > Virginia and it gets hotter than hell in the summer. Is this safe?
> > > Isn't 5W30 too thin? Or am I worrying about nothing? If it is too
> > > thin, is there an additive I can toss in instead of another changeout
> > > for the next 3,000? Thanks in advance.
> > >
> > > Matt

Del Rawlins

In <40747D6D.84B59490@sympatico.ca> Mike Romain wrote:
> Or hot.... Just better for cold.
>
> 30 is 30 when hot and that is what either oil is rated for at 100C.

If I am remembering correctly from when the aeroshell rep spoke with the
aircraft engine class I took a year and a half ago, he said that
multigrade oils start out as base stocks the weight of the smaller
number. I.E. a 5W30 is actually a 5W oil which has had "stuff" added to
it to make it thicken to 30W as it heats up, and the 10W30 starts out as
a 10W oil. All else being equal, since the 10W30 starts out thicker it
will work better at warmer temperatures. Or something along those lines.

I don't really understand the mechanism but the point is that 30 doesn't
necessarily equal 30 where multigrade oils are concerned.

----------------------------------------------------
Del Rawlins- del@_kills_spammers_rawlinsbrothers.org
Remove _kills_spammers_ to reply via email.
Unofficial Bearhawk FAQ website:
http://www.rawlinsbrothers.org/bhfaq/

Del Rawlins

In <40747D6D.84B59490@sympatico.ca> Mike Romain wrote:
> Or hot.... Just better for cold.
>
> 30 is 30 when hot and that is what either oil is rated for at 100C.

If I am remembering correctly from when the aeroshell rep spoke with the
aircraft engine class I took a year and a half ago, he said that
multigrade oils start out as base stocks the weight of the smaller
number. I.E. a 5W30 is actually a 5W oil which has had "stuff" added to
it to make it thicken to 30W as it heats up, and the 10W30 starts out as
a 10W oil. All else being equal, since the 10W30 starts out thicker it
will work better at warmer temperatures. Or something along those lines.

I don't really understand the mechanism but the point is that 30 doesn't
necessarily equal 30 where multigrade oils are concerned.

----------------------------------------------------
Del Rawlins- del@_kills_spammers_rawlinsbrothers.org
Remove _kills_spammers_ to reply via email.
Unofficial Bearhawk FAQ website:
http://www.rawlinsbrothers.org/bhfaq/

Del Rawlins

In <40747D6D.84B59490@sympatico.ca> Mike Romain wrote:
> Or hot.... Just better for cold.
>
> 30 is 30 when hot and that is what either oil is rated for at 100C.

If I am remembering correctly from when the aeroshell rep spoke with the
aircraft engine class I took a year and a half ago, he said that
multigrade oils start out as base stocks the weight of the smaller
number. I.E. a 5W30 is actually a 5W oil which has had "stuff" added to
it to make it thicken to 30W as it heats up, and the 10W30 starts out as
a 10W oil. All else being equal, since the 10W30 starts out thicker it
will work better at warmer temperatures. Or something along those lines.

I don't really understand the mechanism but the point is that 30 doesn't
necessarily equal 30 where multigrade oils are concerned.

----------------------------------------------------
Del Rawlins- del@_kills_spammers_rawlinsbrothers.org
Remove _kills_spammers_ to reply via email.
Unofficial Bearhawk FAQ website:
http://www.rawlinsbrothers.org/bhfaq/

Del Rawlins

In <40747D6D.84B59490@sympatico.ca> Mike Romain wrote:
> Or hot.... Just better for cold.
>
> 30 is 30 when hot and that is what either oil is rated for at 100C.

If I am remembering correctly from when the aeroshell rep spoke with the
aircraft engine class I took a year and a half ago, he said that
multigrade oils start out as base stocks the weight of the smaller
number. I.E. a 5W30 is actually a 5W oil which has had "stuff" added to
it to make it thicken to 30W as it heats up, and the 10W30 starts out as
a 10W oil. All else being equal, since the 10W30 starts out thicker it
will work better at warmer temperatures. Or something along those lines.

I don't really understand the mechanism but the point is that 30 doesn't
necessarily equal 30 where multigrade oils are concerned.

----------------------------------------------------
Del Rawlins- del@_kills_spammers_rawlinsbrothers.org
Remove _kills_spammers_ to reply via email.
Unofficial Bearhawk FAQ website:
http://www.rawlinsbrothers.org/bhfaq/

Mike Romain

You are sort of correct.

The best oil for not deteriorating is a straight weight oil. The closer
the numbers are, the better the oil lasts. So a 20W30 is a more stable
oil than say a 0W30.

I would think like you say, the less work chemically is has to do to
have the right thickness the better.

But then we change oil long before it wears out 'usually'. ;-)

Mike

Del Rawlins wrote:
>
> In <40747D6D.84B59490@sympatico.ca> Mike Romain wrote:
> > Or hot.... Just better for cold.
> >
> > 30 is 30 when hot and that is what either oil is rated for at 100C.
>
> If I am remembering correctly from when the aeroshell rep spoke with the
> aircraft engine class I took a year and a half ago, he said that
> multigrade oils start out as base stocks the weight of the smaller
> number. I.E. a 5W30 is actually a 5W oil which has had "stuff" added to
> it to make it thicken to 30W as it heats up, and the 10W30 starts out as
> a 10W oil. All else being equal, since the 10W30 starts out thicker it
> will work better at warmer temperatures. Or something along those lines.
>
> I don't really understand the mechanism but the point is that 30 doesn't
> necessarily equal 30 where multigrade oils are concerned.
>
> ----------------------------------------------------
> Del Rawlins- del@_kills_spammers_rawlinsbrothers.org
> Remove _kills_spammers_ to reply via email.
> Unofficial Bearhawk FAQ website:
> http://www.rawlinsbrothers.org/bhfaq/

Mike Romain

You are sort of correct.

The best oil for not deteriorating is a straight weight oil. The closer
the numbers are, the better the oil lasts. So a 20W30 is a more stable
oil than say a 0W30.

I would think like you say, the less work chemically is has to do to
have the right thickness the better.

But then we change oil long before it wears out 'usually'. ;-)

Mike

Del Rawlins wrote:
>
> In <40747D6D.84B59490@sympatico.ca> Mike Romain wrote:
> > Or hot.... Just better for cold.
> >
> > 30 is 30 when hot and that is what either oil is rated for at 100C.
>
> If I am remembering correctly from when the aeroshell rep spoke with the
> aircraft engine class I took a year and a half ago, he said that
> multigrade oils start out as base stocks the weight of the smaller
> number. I.E. a 5W30 is actually a 5W oil which has had "stuff" added to
> it to make it thicken to 30W as it heats up, and the 10W30 starts out as
> a 10W oil. All else being equal, since the 10W30 starts out thicker it
> will work better at warmer temperatures. Or something along those lines.
>
> I don't really understand the mechanism but the point is that 30 doesn't
> necessarily equal 30 where multigrade oils are concerned.
>
> ----------------------------------------------------
> Del Rawlins- del@_kills_spammers_rawlinsbrothers.org
> Remove _kills_spammers_ to reply via email.
> Unofficial Bearhawk FAQ website:
> http://www.rawlinsbrothers.org/bhfaq/

Mike Romain

You are sort of correct.

The best oil for not deteriorating is a straight weight oil. The closer
the numbers are, the better the oil lasts. So a 20W30 is a more stable
oil than say a 0W30.

I would think like you say, the less work chemically is has to do to
have the right thickness the better.

But then we change oil long before it wears out 'usually'. ;-)

Mike

Del Rawlins wrote:
>
> In <40747D6D.84B59490@sympatico.ca> Mike Romain wrote:
> > Or hot.... Just better for cold.
> >
> > 30 is 30 when hot and that is what either oil is rated for at 100C.
>
> If I am remembering correctly from when the aeroshell rep spoke with the
> aircraft engine class I took a year and a half ago, he said that
> multigrade oils start out as base stocks the weight of the smaller
> number. I.E. a 5W30 is actually a 5W oil which has had "stuff" added to
> it to make it thicken to 30W as it heats up, and the 10W30 starts out as
> a 10W oil. All else being equal, since the 10W30 starts out thicker it
> will work better at warmer temperatures. Or something along those lines.
>
> I don't really understand the mechanism but the point is that 30 doesn't
> necessarily equal 30 where multigrade oils are concerned.
>
> ----------------------------------------------------
> Del Rawlins- del@_kills_spammers_rawlinsbrothers.org
> Remove _kills_spammers_ to reply via email.
> Unofficial Bearhawk FAQ website:
> http://www.rawlinsbrothers.org/bhfaq/