If your Chrysler is showing low oil pressure, it just might be from a little thing called an oil pressure relief valve, which is part of the oil pump. If the engine's oil supply is sludgy from a poor choice of engine oil brand, the sludge is drawn into this valve and inhibit it's proper functioning. That's why I recommend a safe dislodging chemical, like butyl cello-solve. It's foaming action is thorough and gentle enough to be able to be installed and driven with for a few days to continue the internal cleaning and disposal of harmful engine deposits. Chrysler engines, for some reason, are more vulnerable to this than most. Especially the 2.7 liter engine. Actually, there is a major lawsuit involving this, but I won't get into that now. It also removes the goo that may be lodged in your oil pressure switch. LEARN!!!! Use only Mobil One in the future. It does not build up or breakdown under extreme engine temepratures and cleans as you drive. Expensive engine components like hydraulic lifters and chain tensioners, will be protected. Also, you only need to change it once a year or so in most cars.