I have a two part question. First off, I drive a 2003 Jeep Liberty sport with the 3.7 v6. I just passed 161000 miles.
Yesterday I checked my oil level and noticed that I was down two quarts. The oil was changed 3000 miles ago. I added oil to get a safe level. I’ve always used conventional oil with changes every 5k. I monitor the fluid levels and colors between services.
(1) I hear and read differing opinions about oil consumption in older cars. Some have said that my oil consumption rate (1500 miles per quart) is nothing to worry about. Others have suggested that I might take steps to reduce it. I’m not interested in spending tons of dough…I’m saving for a down payment. But if there are simple steps that I can take, why not? The PCV valve is 3 years old. Should I have it replaced? Are there any cleaners or additives that I can add to the oil to reduce oil consumption?
(2) When I removed the oil filler cap, I saw a large amount of yellow sludge inside of it. I’ve read that this is indicative of water in the oil. I’m not losing coolant, so I don’t suspect head gasket issues. I drive a very short distance (1 mile) to the gym every morning before my longer commute (15 miles) to work. I wonder if the short trips are causing the sludge buildup. Any thoughts on that?