weird, i use royal purple now and my truck told me to change it around the same time (~3000 miles) it did when i had my oil changed at the dealership.

 

my 04 tells me oil percentage,instant mpg etc etc you know all that **** the only thing my cluster doesnt have is a tranny temp gauge

 

+1 mine has everything and its a 03 but i think its setup for 5k on changing oil i drove 3k and knew for oil change still said 45 percent

 

i never get to 0% in a year long span, so i just change once a year. I think the manual says change oil at 0% OR every year, whichever comes first.

 

After reading my description of what the oil life is based on, why would you think that the brand or type of oil would have anything to do with how the computer decides when the oil needs changing?

 

i just specified brand because i thought it was common knowledge that RP was a synthetic. I've asked hundreds of different people and everyone says 3-4k for conventional oil and 5-8k for synthetic. i thought that your post was saying that your truck had a longer oil change interval than what i considered to be normal, that's all.

 

What, do you only go downhill?

 

really must be nice to change oil once a year do mine once a month

 

the truck is my "recreational" toy. Used to tow the boat, head up to the snow, or just romp around.

My daily driver is a BMW M3. Wayyy better gas mileage than the blown beast of a truck!

 

Correct, the oil life monitor doesn't know what brand or type of oil is in there, it determines when the oil should be changed solely by the items that you listed...