Chrysler recommends oil changes at 8K miles or 6 months, so I'd go with the oil change reminder at 3.5K miles unless I was using synthetic oil.
Not trying to be a jerk or anything here. I see similar comments to "Chrysler recommends XXX..."
on a lot on auto forums in relation to what the owner's manual says about OC's and they aren't always accurate. In this case with the 6/8000 what you said is not 100% correct...
Chrysler does not actually recommend OC's every 6 months or 8,000( 2011 and newer - 6/6000 for earlier ). That is the absolute maximum time and mileage they allow for. What they actually recommend is to go by the OLM( where equipped of course )but not to exceed the max time/mileage limits if the OLM has not tripped by the time you get there.
I know that is being picky but I just wanted to point out that the time and mileage figures are not what they want you to do, per say, but ratther it is the most you can do. Big difference. To me anwyay. A lot of people would see that and think it is the normal oil change interval and thus end up exceeding it. In truth you should not exceed that time/mileage figure at all. Not under warranty anyway. Get the oil changed BEFORE you hit 6 months or 8,000 miles.
Again, it is the maximum you can do not the actual recommended change figures( on a new vehicle with an OLM anyway - 6/6000 for 2010 and earlier ). Exact wording from my 2011 manual...
Originally Posted by 2011 Patriot OM - Page 406
Change Engine Oil
The oil change indicator system will remind you that it is time to take your vehicle in for scheduled maintenance. Refer to the “Maintenance Schedule” for the proper maintenance interval.
NOTE: Under no circumstances should oil change intervals exceed 8,000 miles (13 000 km) or six months,whichever occurs first.
8,000 is really pushing it for conventional oil. Even if you ran the best brand out there. Not sure I could do that even if all my driving was easy highway miles. 8,000 on synthetic no problem.
Again, no offense was meant by this.