5-20 oil

On Tue, 19 Jul 2005, Alex Rodriguez wrote:

> Who make 5-20 oil?

All the major makers.

> I have a 2005 T&C with a 3.8 motor. We are coming up on the time to
> change the oil. I saw the recommended oil is one I don't recall having
> seen in the past.

But this is the present!
 >> Stay informed about: 5-20 oil 

<kmatheson DeleteThis @sisna.com> wrote in message
news:1121812965.094408.27660@f14g2000cwb.googlegroups.com...
>
>
> Daniel J. Stern wrote:
>> On Tue, 19 Jul 2005, Alex Rodriguez wrote:
>>
>> > Who make 5-20 oil?
>>
>> All the major makers.
>>
>> > I have a 2005 T&C with a 3.8 motor. We are coming up on the time to
>> > change the oil. I saw the recommended oil is one I don't recall having
>> > seen in the past.
>>
>> But this is the present!
>
> Is 5-20w now the recommended oil for the 3.3/3.8? My 1993 3.3 calls for
> 5-30.
>
> -Kirk Matheson

If you live in a hot location 5W-30 might be a good choice. Mobil 1 comes in
both a 5W-20 and 5W-30 selection. That's what I use and I change at the
recommended extended change schedule of 7,500 miles or so.

Richard.
 >> Stay informed about: 5-20 oil 

On Tue, 19 Jul 2005 kmatheson DeleteThis @sisna.com wrote:

> Is 5-20w now the recommended oil for the 3.3/3.8? My 1993 3.3 calls for
> 5-30.

Somethin' in the air today that's causing confusion amongst "past",
"present" and "future"?

5w20 is being recommended by lots of automakers in their North
American-market vehicles for fuel economy certification reasons. The same
engines in the same cars often call for 5w30 in other markets. This does
not mean older vehicles should be switched to 5w20.
 >> Stay informed about: 5-20 oil 

Daniel J. Stern wrote:
> On Tue, 19 Jul 2005 kmatheson.RemoveThis@sisna.com wrote:
>
> > Is 5-20w now the recommended oil for the 3.3/3.8? My 1993 3.3 calls for
> > 5-30.
>
> Somethin' in the air today that's causing confusion amongst "past",
> "present" and "future"?
>
> 5w20 is being recommended by lots of automakers in their North
> American-market vehicles for fuel economy certification reasons. The same
> engines in the same cars often call for 5w30 in other markets. This does
> not mean older vehicles should be switched to 5w20.

That is what I was trying to determine. From what I gather, 5w20 is now
being recommended for newer versions of the 3.3 and 3.8, depending on
the market. I will stay with 5w30 synthetic for my 1993 3.3.

Do new 3.3 and 3.8's have tighter clearances than their predecessors,
or is is the 5w20 recommended only for the purpose of improving fuel
economy?

-Kirk Matheson
 >> Stay informed about: 5-20 oil 

On Tue, 19 Jul 2005 kmatheson RemoveThis @sisna.com wrote:

> Do new 3.3 and 3.8's have tighter clearances than their predecessors,

No. Engine internal clearances haven't changed significantly in the last
four decades.

> or is is the 5w20 recommended only for the purpose of improving fuel
> economy?

Correct.
 >> Stay informed about: 5-20 oil 

"Daniel J. Stern" <dastern DeleteThis @127.0.0.1> wrote in message
news:Pine.GSO.4.58.0507200022580.8063@alumni.engin.umich.edu...
> On Tue, 19 Jul 2005 kmatheson DeleteThis @sisna.com wrote:
>
> > Do new 3.3 and 3.8's have tighter clearances than their predecessors,
>
> No. Engine internal clearances haven't changed significantly in the last
> four decades.
>
> > or is is the 5w20 recommended only for the purpose of improving fuel
> > economy?
>
> Correct.

And I would also be concerned with longevity - it seems to me there's a
fundamental tradeoff operating here. You can get best lubricating longevity
or best fuel economy, but not both. Seems like good old 10W-30 was
the recommended fill for most of those last four decades.

Ted
 >> Stay informed about: 5-20 oil 

Ted Mittelstaedt wrote:
> "Daniel J. Stern" <dastern DeleteThis @127.0.0.1> wrote in message
> news:Pine.GSO.4.58.0507200022580.8063@alumni.engin.umich.edu...
>
>>On Tue, 19 Jul 2005 kmatheson DeleteThis @sisna.com wrote:
>>
>>
>>>Do new 3.3 and 3.8's have tighter clearances than their predecessors,
>>
>>No. Engine internal clearances haven't changed significantly in the last
>>four decades.
>>
>>
>>>or is is the 5w20 recommended only for the purpose of improving fuel
>>>economy?
>>
>>Correct.
>
>
> And I would also be concerned with longevity - it seems to me there's a
> fundamental tradeoff operating here. You can get best lubricating longevity
> or best fuel economy, but not both. Seems like good old 10W-30 was
> the recommended fill for most of those last four decades.
>
> Ted
>
>
How much difference in mileage are we talking about?
 >> Stay informed about: 5-20 oil 

"Ted Mittelstaedt" <tedm.DeleteThis@toybox.placo.com> wrote in message
news:newscache$gadxji$219$1@news.ipinc.net...
>
>
> And I would also be concerned with longevity - it seems to me there's a
> fundamental tradeoff operating here. You can get best lubricating
> longevity
> or best fuel economy, but not both. Seems like good old 10W-30 was
> the recommended fill for most of those last four decades.

Thicker isn't always better. Lot's of good info on 5W-20's in the forums at
bobistheoilguy.com. The used oil analyses for dino 5w-20's are just as good
as for synth. Better resistance to shear over 5w-30, too. I can find 5w-20
locally at Wally World, AutoZone, or O'Reilly's.

Bob
 >> Stay informed about: 5-20 oil 

On Tue, 19 Jul 2005 22:50:36 +0000, Richard wrote:

>
> <kmatheson.DeleteThis@sisna.com> wrote in message
> news:1121812965.094408.27660@f14g2000cwb.googlegroups.com...
>>
>>
>> Daniel J. Stern wrote:
>>> On Tue, 19 Jul 2005, Alex Rodriguez wrote:
>>>
>>> > Who make 5-20 oil?
>>>
>>> All the major makers.
>>>
>>> > I have a 2005 T&C with a 3.8 motor. We are coming up on the time to
>>> > change the oil. I saw the recommended oil is one I don't recall having
>>> > seen in the past.
>>>
>>> But this is the present!
>>
>> Is 5-20w now the recommended oil for the 3.3/3.8? My 1993 3.3 calls for
>> 5-30.
>>
>> -Kirk Matheson
>
> If you live in a hot location 5W-30 might be a good choice. Mobil 1 comes in
> both a 5W-20 and 5W-30 selection. That's what I use and I change at the
> recommended extended change schedule of 7,500 miles or so.
>
> Richard.

I'm about to do the first oil change for my new 300C, should I do standard
or synthetic? I've used Mobil 1 for the past 30 years, does it make sense
to continue using it or are modern 5W-20 oils as good or better then Mobil
1?
 >> Stay informed about: 5-20 oil 

General Schvantzkoph wrote:
> On Tue, 19 Jul 2005 22:50:36 +0000, Richard wrote:
>
>
>><kmatheson.RemoveThis@sisna.com> wrote in message
>>news:1121812965.094408.27660@f14g2000cwb.googlegroups.com...
>>
>>>
>>>Daniel J. Stern wrote:
>>>
>>>>On Tue, 19 Jul 2005, Alex Rodriguez wrote:
>>>>
>>>>
>>>>>Who make 5-20 oil?
>>>>
>>>>All the major makers.
>>>>
>>>>
>>>>>I have a 2005 T&C with a 3.8 motor. We are coming up on the time to
>>>>>change the oil. I saw the recommended oil is one I don't recall having
>>>>>seen in the past.
>>>>
>>>>But this is the present!
>>>
>>>Is 5-20w now the recommended oil for the 3.3/3.8? My 1993 3.3 calls for
>>>5-30.
>>>
>>>-Kirk Matheson
>>
>>If you live in a hot location 5W-30 might be a good choice. Mobil 1 comes in
>>both a 5W-20 and 5W-30 selection. That's what I use and I change at the
>>recommended extended change schedule of 7,500 miles or so.
>>
>>Richard.
>
>
> I'm about to do the first oil change for my new 300C, should I do standard
> or synthetic? I've used Mobil 1 for the past 30 years, does it make sense
> to continue using it or are modern 5W-20 oils as good or better then Mobil
> 1?
>
>

They aren't as good as Mobil 1.


Matt
 >> Stay informed about: 5-20 oil 

"General Schvantzkoph" <schvantzkoph.TakeThisOut@yahoo.com> wrote in message
news:pan.2005.07.20.23.39.46.892750@yahoo.com...> I'm about to do the first
oil change for my new 300C, should I do standard
> or synthetic? I've used Mobil 1 for the past 30 years, does it make sense
> to continue using it or are modern 5W-20 oils as good or better then Mobil
> 1?

The UOAs for SL/SM IL-4 dino 5w-20s are just as good as for synth. The
owners manual says you can use synth, but you have to change it at the Sched
A or B intervals to maintain your warranty, so no real savings in terms of
fewer changes. Your call...

bob
 >> Stay informed about: 5-20 oil 

In article <Pine.GSO.4.58.0507191958120.23979.DeleteThis@alumni.engin.umich.edu>,
dastern.DeleteThis@127.0.0.1 says...
>
>
>On Tue, 19 Jul 2005 kmatheson.DeleteThis@sisna.com wrote:
>
>> Is 5-20w now the recommended oil for the 3.3/3.8? My 1993 3.3 calls for
>> 5-30.
>
>Somethin' in the air today that's causing confusion amongst "past",
>"present" and "future"?
>
>5w20 is being recommended by lots of automakers in their North
>American-market vehicles for fuel economy certification reasons. The same
>engines in the same cars often call for 5w30 in other markets. This does
>not mean older vehicles should be switched to 5w20.

This sounds reasonable. But I would say it is not working. My T&C with a 3.8
engine gets horrible mileage in city driving, under 15mpg. On the highway it
does ok, about 24mpg. This is my biggest dissappointment with the T&C.
Otherwise it is an excellent mini-van
-----------
Alex
 >> Stay informed about: 5-20 oil 

On Thu, 21 Jul 2005, Alex Rodriguez wrote:

> >5w20 is being recommended by lots of automakers in their North
> >American-market vehicles for fuel economy certification reasons. The
> >same engines in the same cars often call for 5w30 in other markets.
> >This does not mean older vehicles should be switched to 5w20.
>
> This sounds reasonable. But I would say it is not working. My T&C with
> a 3.8 engine gets horrible mileage in city driving, under 15mpg. On the
> highway it does ok, about 24mpg.

Not the point -- the point is to squeak another fraction of an MPG in on
the Federal fuel economy and emission certification tests, NOT to offer
the consumer measurably better on-road fuel mileage.
 >> Stay informed about: 5-20 oil