: oil change

11-24-09, 08:01 AM
wondering how many miles between oil changes. been relying on the oil monitoring system but am starting to get concerned. have put about 4k miles on car since buying it (2008 with 9k miles when purchased); monitoring system indicates oil life still over 73%. had a 2005 cts-v that i changed oil every 4-5k. i realize that oil life is based on driving habits/conditions... nonetheless, thought i'd check around to see how often others are changing the 9 qts.

11-24-09, 08:44 PM
supercharged motor, I change mine every 3k with mobil 1... Expensive intervals but my engine is well worth the extra TLC

11-25-09, 07:29 AM
Synthetic oil is made for this type of abuse, still your choice if you want to change the oil that often, but this high performance oil should easily make 5k miles, max of 7k miles.

11-25-09, 04:27 PM
Every 5K for me.....


11-25-09, 09:47 PM
I've been going to 8K and still seeing 40 odd % left, but don't feel comfortable leaving it longer.

11-26-09, 12:39 PM
thanks for the information. i'll think i'll stick with a 4 - 5k mile schedule.

11-29-09, 07:38 PM
I have been using the oil life system and it has been running 15-18 thousand miles between changes. I was also suspisious of the interval so I have been sending samples to Blackstone Labs for analysis. Every report has come back clean with plenty of protection left in the used oil I remove.

11-30-09, 06:18 AM
are you using the regular Mobil 1 or the Extended life?

12-01-09, 06:24 AM
Regular Mobil1, I have not seen the extended life in stores yet but I will look harder for it next time.

12-01-09, 07:54 AM
Regular Mobil 1 synth in this car will last far beyond the point anyone should feel safe leaving it there.