Oil Change

Clay L wrote:

ArchHoagland wrote:

harold1946 wrote:
Once reset it will give the the change oil message again in 3000 miles.

I'm not too sure about that. A lady engineer at GM developed a way to monitor all the engine parameters and the change oil message will come on based on your driving.

For example, if your engine is running a lot by idling it will require oil changes at less mileage whereas if you are out on the freeway all the time it will go further before a need to change.

I have seen mine go over 5,000 miles before the change oil message, although I don't use that message for my change interval. I'm pretty much in the 3,000 to 4,000 area.

I agree with this post! I have a 04 Workhorse my manual says change oil and filter once a year or every 7,500 miles whichever comes first.

Not on the 2004/2005 models. The data may be in the engine computer but it wasn't used by the Actia instrument cluster back then.
According to Workhorse when I talked to them back in 2005 the oil change interval was based strictly on mileage.

My manual says to change oil every 7000 miles unless you are pulling a trailer then at 3000 miles. I figured pulling a car is about the same as pulling a trailer so I changed as close to 3000 miles as practical.
I saw the light come on a few times when I forgot to reset it after I changed the oil but never checked to see how many miles were involved.