Originally Posted by Vette_Fan

.... These are modern cars, with modern oils, not the cars from 60's or 70's. The old myth (every 3K miles) is not valid anymore.

I change mine around 6K - 8K miles. The DIC is still at about 45-50%. The Mobile1 suggests and guarantees 15K miles, but being more on the safe side I choose to do it around 6 - 8K miles. I also use the K&N filter, which is way better than the $4.00 Fram filter. When you're using high quality products, then I wouldn't use the same standard for them as the cheaper products.

I just changed my oil & filter last week. This time, I'm planning on changing my filter at 5K miles, and keep the same oil for 8K - 9K miles. How's that sound....

Originally Posted by Vette_Fan

.... These are modern cars, with modern oils, not the cars from 60's or 70's. The old myth (every 3K miles) is not valid anymore.

Originally Posted by 03spiralcpe

I was told that the computer figures out the driving style. I change mine at least once a year if the oil life does not reach about 10%. I change my DD, which is an 04 Avalanche at about 3% ( 5000 - 7000 miles). That is what dealer told me when I bought the vehicle, use the oil life on the DIC.