Originally Posted by bluesubie
Do you normally need to add a 1 1/2 quarts during a 6k mile interval?
Here's the story behind those results.
I was planning on changing the oil out at 11250 miles as per the manual, but as per usual, my plan went bye-bye.
Just before my target change date, we got a call that my Uncle passed away and we had to make it to a funeral in NYC.
No time to do the change, so we jumped in the car and made the 1250 mile trip in just over 17 hours.
Before we left, I had added a total of 1/2 quart of make up oil.
If you do the math, you can figure out why the other quart was needed.
We were traveling 3 digit speeds for a while, but mostly running 80-90 (eating gas like mad) and the Sube engines don't like that much (unless you run a thicker oil).
I added 1/2 qt in Fayetteville and the other half in NYC.
We took it easy going home (65-70) and added no oil (it was down less than 1/4 when we got home)
I'm glad I use a 40 weight oil, otherwise I probably would have had to put in much more.
The oil was dropped the day after we returned home and sent in for the analysis.
Since then, I've put on another 2k+ miles and haven't had to add anything yet.
We're going to Dallas next week and will probably do another change when we return. Stay tuned.
I guess the equation should be: boost = oil consumption.
Plan your oil weight choice to match your climate AND driving style.