I have a problem.

In the last few years I have improved my day to day life.

I now own 2 sports cars, a light truck, a boat and my partner and I live less than 5 miles from our workplaces which are less than 1 mile apart.

Every morning it's a tough decision: If its snowy, we take the Jeep. If we want some fun, we take the MR2. If we want luxury and snobbery, we take the crossfire. What to do?!

As a result, we end up carpooling most every day and between all 3 vehicles, we put less than 5000 miles on each one per year.

This horrible dilemma has banished us to making a lot of very short trips. One thing is clear: the Crossfire takes a while to warm up and our typical trip is less than 10 minutes.

I have owned my 2006 crossfire limited coupe for over a year and my FSS says it is time for an oil change. So I bought some Mobil 1, 0W-40 at Walmart, some MANN filters off E-Bay and a Mity-vac and began the process.

The Crossfire oil cap has sludge deposits. I use blended oil on the Jeep and Castrol Syntec in the MR2 and sludge is not present. I have NO IDEA what oil was used in the crossfire when I bought her. The previous owner had her for a year but could not afford to own her. I have put less than 5K on the car since I purchased her.

I decided to treat the engine with Marvel Mystery Oil before and after the change. Hopefully this will do some needed cleaning, but what I am wondering now is how best to prevent this from being a problem in the future.

I am looking for some practical ways to modify my vehicle use to minimize sludge formation in my Crossfire on an on-going basis.