My van does a LOT of short trips of only a few miles, and many short trips during the brutal winter. My oil has about ~7k on it right now and looks pretty dirty.Pawo007, why so soon...7000 miles? You are using one of the best and most expensive oils on the market. I change mine at 15,000 and the oil still looks good.
The oil costs about $37 for 5 liters.....so overall cost is roughly $70 a year with the number of miles we usually drive it....tiny on the spectrum of overall costs.
My brother goes about 8-10k in his E350 sedan on the same oil but he does a ton more freeway miles. By 10k the oil looks about the same.
I may send in a sample to blackstone during my next change soon to see how good the oil still is...if its still really good then I'll add a couple thousand miles onto the interval.