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Synthetic Oil - Toyota Corolla 2003

 
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mehere

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Since: Jul 13, 2005
Posts: 1



(Msg. 1) Posted: Tue Aug 02, 2005 7:37 pm
Post subject: Synthetic Oil - Toyota Corolla 2003
Archived from groups: alt>autos>toyota (more info?)

How are the Corolla S on 10w-30 synthetic motor oil?
Anyone have any experience? Thanks in advance.

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Ray O

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Since: Mar 09, 2005
Posts: 1103



(Msg. 2) Posted: Tue Aug 02, 2005 9:51 pm
Post subject: Re: Synthetic Oil - Toyota Corolla 2003 [Login to view extended thread Info.]
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"mehere" wrote in message

> How are the Corolla S on 10w-30 synthetic motor oil?
> Anyone have any experience? Thanks in advance.
>
>

Unless you are an automotive engineer or are following the advice of an
automotive engineer (and not an auto enthusiast), then my recommendation is
that you follow the manufacturer's recommendations.

For example if Toyota recommends 5W-30 SL for your car, then use that weight
and grade regardless of whether it is conventional or synthetic. Toyota
also recommends that you do not extend the oil change intervals for
synthetic.
--
Ray O
correct the return address punctuation to reply

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Bassplayer12

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Since: Mar 11, 2005
Posts: 69



(Msg. 3) Posted: Wed Aug 03, 2005 1:55 am
Post subject: Re: Synthetic Oil - Toyota Corolla 2003 [Login to view extended thread Info.]
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snip

> For example if Toyota recommends 5W-30 SL for your car, then use that
> weight and grade regardless of whether it is conventional or synthetic.
> Toyota also recommends that you do not extend the oil change intervals for
> synthetic.

A good quality synthetic oil is designed to outlast dino oil by a large
margin. I'd be curious to hear Toyota's argumentation. If they are concerned
about contaminants in the oil, wouldn't changing the oil filter frequently
be just as good?
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Ray O

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Since: Mar 09, 2005
Posts: 1103



(Msg. 4) Posted: Wed Aug 03, 2005 3:02 am
Post subject: Re: Synthetic Oil - Toyota Corolla 2003 [Login to view extended thread Info.]
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"Bassplayer12" wrote in message

> snip
>
>> For example if Toyota recommends 5W-30 SL for your car, then use that
>> weight and grade regardless of whether it is conventional or synthetic.
>> Toyota also recommends that you do not extend the oil change intervals
>> for synthetic.
>
> A good quality synthetic oil is designed to outlast dino oil by a large
> margin. I'd be curious to hear Toyota's argumentation. If they are
> concerned about contaminants in the oil, wouldn't changing the oil filter
> frequently be just as good?
I never did hear an official reason for Toyota's recommendation. My job was
to give the "party line" when asked a question.
--
Ray O
correct the return address punctuation to reply
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SnoMan




Joined: May 17, 2005
Posts: 1396



(Msg. 5) Posted: Wed Aug 03, 2005 12:00 pm
Post subject: Re: Synthetic Oil - Toyota Corolla 2003 [Login to view extended thread Info.]

Bassplayer12 wrote:
snip

> For example if Toyota recommends 5W-30 SL for your car, then use that
> weight and grade regardless of whether it is conventional or synthetic.
> Toyota also recommends that you do not extend the oil change intervals for
> synthetic.

A good quality synthetic oil is designed to outlast dino oil by a large
margin. I'd be curious to hear Toyota's argumentation. If they are concerned
about contaminants in the oil, wouldn't changing the oil filter frequently
be just as good?


Changing filter will not remove chemical contaminents from oil. Also there is nothing wrong with using 10W30 in a Yota (It is in the manual) The only reason any auotmotive manufactur recoomands 5w30 as a default oil over 10W30 is to fractionally improve MPG ratings and improve cold weather starting and oil flow. (a problem the SYN oil does not have even in 10w30 grade) I used 10w30 SYN in my 91 yota camary for 220k miles and never had any issues and it saw temps as cold as minus 50 a few years and got as high as 41mpg too. When I ran it in it I would change filter at 3000 miles and change everything and start over between 5000 and 6000 miles.
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Ed White

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Since: Mar 07, 2005
Posts: 45



(Msg. 6) Posted: Wed Aug 03, 2005 12:49 pm
Post subject: Re: Synthetic Oil - Toyota Corolla 2003 [Login to view extended thread Info.]
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Filters don't remove water, acids, or unburned hydrocarbons.

Ed
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Ed White

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Since: Mar 07, 2005
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(Msg. 7) Posted: Wed Aug 03, 2005 1:59 pm
Post subject: Re: Synthetic Oil - Toyota Corolla 2003 [Login to view extended thread Info.]
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Who told you - "Good quality synthetic oils are, I was told, designed
to leave a permanent protective coat on a metal surfaces." Sounds like
something an Amsoil salesman (but not Amsoil) might say. Why do you
think this is more the case for synthetics than for conventional oils?
One of the cheif benefits claimed for synthetic oils is that they flow
better. Seems contadictory that they flow better and stay in place
better. All motor oil that meets the current API classifications
(synthetic and conventional) include wear fighting additives. These
additives included anti-wear additivies that do provide protection like
you are describing, but you don't have to have to use synthetic oil to
get these additives. Amsoil does claim to provide "extra" wear fighting
ingredients in some of it forumations, but those are often not API
certified. Excessive amounts of some additives are alleged to damage
catalytic convertors.

Water, acids, and unburned hydrocarbons are liguids just like the oil.
A 6 micron filter won't remove them anymore than it removes the oil. It
is possible to have a fitler that filters too small a particle. Below a
certain size, small paricles are not particularly harmful. If you
filter all these out, you will just reach the capacity of the filter
sooner and kick in the filter's bypass valve, which will let unfiltered
oil flow through the engine. You can use a seperate bypass type filter
in addition to a full flow filter to try and remove very small
particles from the oil (while still retaining the full flow filter to
prevent larger particles from circulating), but people who change their
oil at the vehicle manufacturer's recommended intervals are not likely
to benefit from bypass filters.

Ed
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Bassplayer12

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Since: Mar 11, 2005
Posts: 69



(Msg. 8) Posted: Wed Aug 03, 2005 7:57 pm
Post subject: Re: Synthetic Oil - Toyota Corolla 2003 [Login to view extended thread Info.]
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> Filters don't remove water, acids, or unburned hydrocarbons.

Good quality synthetic oils are, I was told, designed to leave a permanent
protective coat on a metal surfaces. How concerned do we still have to be
about water, acids, or unburned hydrocarbons if we are using synthetics?
Also, some filters are apparently designed to filter down to 6 microns,
which should take care pretty much of everything, or close to it.
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