From: Andy on
On Tue, 03 Apr 2007 10:21:15 -0700, SMS <scharf.steven(a)geemail.com>
wrote:

>Andy wrote:
>> On Tue, 03 Apr 2007 02:08:37 -0700, SMS <scharf.steven(a)geemail.com>
>> wrote:
>>
>>> Note that the other Amsoil products, while they cannot be API certified
>>> due to the ZDDP level, do use synthetic base stock. Don't use them in
>>> vehicles with catalytic converters, despite what your local MLM person
>>> may tell you. Mobil 1 EP does use synthetic base stock.
>>
>> They have no effect on catalytic converters. I have no idea where you
>> came up with that one.
>
>Never use a non-API certified synthetic oil (there are many of these on
>the market) in a vehicle with a catalytic converter. The problem with
>the non-API certified synthetics is that they contain too much
>phosphorus (in the form of the additive ZDDP (Zinc Dialkyl
>Dithiophosphates)). The API has limited the amount of phosphorus because
>phosphorus shortens the life of the catalytic converter. These oils are
>fine for snowmobiles, motorcycles, and older cars that don't have a
>catalytic converter, and the extra ZDDP does provide additional wear
>protection.

What proof do you have of this? API is only a volunty program brought
to you by the big oil companies. Also API is an American only thing.
From: Willy on

"Steve Barker" <ichasetrains(a)some.yahoo.com> wrote in message
news:b7udnRdisKEO2pbbnZ2dnUVZ_hudnZ2d(a)giganews.com...
> No, 3000 miles from the last oil change. It's right in the book.
>
> --
> Steve Barker
>
> YOU should be the one
> controlling YOUR car.
> Check out:
> www.lightsout.org
>
>
>
>
> "Brent P" <tetraethylleadREMOVETHIS(a)yahoo.com> wrote in message
> news:wJWdnaDFx-MeppbbnZ2dnUVZ_hadnZ2d(a)comcast.com...
>> In article <tfqdnaXhke_ggpbbnZ2dnUVZ_oipnZ2d(a)giganews.com>, Steve Barker
>> wrote:
>>> Look at your Chevy's manual and see what it says to do if the auto
>>> reminder
>>> is reset by accident. My GMC's manual say in this event to change the
>>> oil
>>> at 3,000 miles. Imagine that. Straight from the Big One.
>>
>> 3,000 miles from when the auto reminder is accidently reset. That makes
>> sense.... think about it for it momement.... odds are it's not being
>> accidently reset at the time it needs to be reset but when there is some
>> milage already done. Sounds to me as if this accidental reset rule is
>> designed to hit a nominal 6K change.
>>
>>
>>
>>
>
>
>

What model year is your GM. It sounds like one of the older units that was
based on mileage.

The last few years they have a true sensor which detects when the oil needs
changed, and has no connection to mileage.

Willy



From: SMS on
Willy wrote:

> The last few years they have a true sensor which detects when the oil needs
> changed, and has no connection to mileage.

There still is a connection. They use the number of starts, the average
number of miles per start, the average speed, maximum speed, etc. They
don't have any kind of system that evaluates the oil properties, it's
all based on usage factors.
From: John Henderson on
SMS wrote:

> Willy wrote:
>
>> The last few years they have a true sensor which detects when
>> the oil needs changed, and has no connection to mileage.
>
> There still is a connection. They use the number of starts,
> the average number of miles per start, the average speed,
> maximum speed, etc. They don't have any kind of system that
> evaluates the oil properties, it's all based on usage factors.

That's what I thought until recently too. But according to
http://www.vw.co.uk/assets/Longlife_servicing.pdf the world is
moving on:

"These engines use built-in sensors that continually monitor the
oil quality, making it possible to enjoy reliable and confident
motoring for up to a maximum of 30,000* miles or 24 months
(whichever occurs first)".

"Please note that if the engine is topped up with more than ½
litre of non-longlife oil between services, the service
indicator will come on earlier and the time or distance between
services will be reduced."

John
From: Andy on
On Tue, 03 Apr 2007 14:51:49 -0700, SMS <scharf.steven(a)geemail.com>
wrote:

>Willy wrote:
>
>> The last few years they have a true sensor which detects when the oil needs
>> changed, and has no connection to mileage.
>
>There still is a connection. They use the number of starts, the average
>number of miles per start, the average speed, maximum speed, etc. They
>don't have any kind of system that evaluates the oil properties, it's
>all based on usage factors.

It depends on the car.