The 3.8 is a known oil-burner, that seems to be on par with some others that have complained about oil consumption. You could try running 5w30 instead of 5w20 and see if that helps.
This. Some 3.8's use more oil than they should, not all. However, if you think you're using more than 1 qt. every 1,000 miles your JK still might qualify for a dealer to perform a "consumption" test. How many miles did you put on going through 2 qts. My 10 3.8 doesn't have any noticeable oil consumption. All modern engines in particular use some oil. Unfortunately, Chrysler goes by this standard: NORMAL OIL CONSUMPTION: Below are industry standards for normal engine oil consumption: Mileage below 50,000: Normal oil consumption is one quart for each 1,000 miles driven. Mileage above 50,000: Normal oil consumption is one quart for each 750 miles driven.[/B]
^^^X2, Also trying changing your PCV valve. This combo may not stop the oil usage, but it should slow it down......:thumb:
Always check you oil level weekly, or at gas fill ups!!!!!!!!
I will switch oil type's. Is the PVC easy to replace? What's a new one cost?Ditto to 3.8's using oil, common concern. A couple things have helped mitigate the condition, primarily swapping out the PCV valve ( located atop the driver side rocker cover ) and switching to a higher viscosity oil. The 3.8 should never have been spec'd for 5w-20 oil by Chrysler. Absolutely nothing was done internally to make the engine compatible with such lightweight lubricants. It was done so for certification reasons only, and even there it wasn't necessary. It was designed over 25 years ago for 10w-30, and it should be noted that all Mopar re manufactured 3.8s specify 10w-30. Some time ago a dealer service manager advised switching to 10w-30 on JK 3.8s as early in the life of the engine as possible. I run it in my '09 and have minimal to no oil consumption. Give it a try.
Have you ever had a tech do a cylinder leak down test on it?I changed the pcv and run 10-30. It helped but still uses lots of oil. Carrying oil in the back, and checking it every week or two has become a part of my life now lol dde01 The pcv is super easy. Look up a video on YouTube.
^^^Yep, all of them 3.8 engines are thirsty...The problem with some 3.8's that burn an excessive amount of oil is that during 3.8 engine production, a small percentage of JK engines were assembled in Mexico and the piston rings were incorrectly installed. It took awhile for Chrysler to troubleshoot the problem and a small percentage of engines were installed in JK's, which will burn an excessive amount of oil as they accumulate mileage. Not all engines assembled in Mexico had this issue. JK window stickers indicate the engine assembly location. If it indicates Mexico, only for 3.8's, there could be a major consumption issue that develops. Most other 3.8's don't consume any more oil than any other engine, including the 3.6. Of course on the forum, all 3.8's are oil burners.