Petrol (including E85/E100 where fitted) service intervals
Jeep petrol engines typically focus on regular oil and filter servicing, plus timely replacement of spark plugs and air filters to maintain performance and emissions. If your Jeep is approved for E85/E100 blends, it is still serviced on the manufacturer schedule for that engine, but fuel quality and longer storage periods can make drivability issues more likely. Keep an eye on cooling system condition and any signs of oil dilution, especially with frequent short trips. Where the schedule offers a distance and a time limit, follow whichever comes first.