Oil Consumpstion Increase

Yes, my 2004 has 97K miles and is burning ~0.75 quarts after 7,500 miles. Extrapolating your 2008's oil consumption rate leads to ~0.5 quart after 8K miles. The actual might be even greater if you were to go that long between changes, to the extent that oil viscosity starts to thin as more miles are logged.

 

What kind of oil are you using?

 

May be time for a high mileage oil, or synthetic.

 

A good synthetic (note I said good) generally will resist consumption better than dino oils. In my experience, Amsoil, Motul, Maxima, and Schaeffers Supreme 9000 are the best choices. Obviously, using any of these oils, you would only change them every 15-20k. I've never tried a high-mileage oil, but some claim to reduce consumption. These oils I've personally turned to when I've had cars that gulped Mobil 1 and Redline down. Not that they are bad oils, but they didn't mate well with the cars I was using them in- (Corvette, S2000, MR2.....may have had to do with the being high-reving.)

You may want to change the PCV valve out as well.

 

I have an 08 with 70k on it. I used Mobil 1 (Full Synthetic) since about 1400 miles. I still do not use oil between 5k oil changes. Maybe because my mileage has not gone high enough quite yet?

 

Probably because using Mobil 1 for 5k mile OCIs is overkill. Good for the engine though. You'll probably never have to worry about engine problems with this regimen.

 

That's good to hear. I plan on keeping this car until about 200k which won't take long.

 

You would be safe going at least 10k on Mobil 1.

 

I drive back and forth to Orlando everyday.

 

I have about 65K on my 2007. I used Pennzoil synthetic 5w30 year round. No oil usage between changes, 5K intervals, oil does not even get dark brown. I reuse the old oil in my mowers and generators. I put about 600 - 800 miles per week on my car when I am home. Plus many trips from MA to Charlotte NC and other race desitinations.

I don't mind the oil expense to ensure a long life...

 

my mileage is listed on my signature.
mine burns oil too. i use really good synthetic, and change the oil no later than 10,000 miles. (i didn't like the results at 15,000... more oil burning...) I definitely burn over a quart within 10,000 miles

 

I have 138,000 on a 2005, and I don't burn any oil at 7,500 mile change intervals. I use synthetic oils, and WIX oil filters.

 

Someone (jayman I think) posted that a car with high mileage of dino oil changes would start to consume oil if switched to synthetic. The reason is that the detergents in the synthetic tend to clean out the gunk deposited by the dino oil that used to help sealing leaks. So the lesson is either to switch to synthetic early, or don't do the switch at all. (All of the above are info gathered from previous posts, not my personal experience ).