I bought a 2021 Grand Cherokee a month ago, and the owners manual basically just says, "change the oil when the car tells you to." My previous vehicle had a oil change indication too, so that's not new, but the manual still gave me a ballpark of 10,000 miles so I knew what to expect. Does anyone know if there's an official recommended interval, or if not, what is the interval you've experienced? Thanks.
Ditto, and I haven't found anything other than the manual / onboard oil change indicator. Personally, I changed the oil after the first 3k miles and switched to full synthetic. Then changed the oil again at 7k miles, again with synthetic to get rid of the last of the dino oil, allowing the change to synthetic intervals. Both times it was well before the oil change indicator showed a required change.
Now at 12.8k miles, and the Jeep is showing 43% oil life remaining. That may be true depending on the criteria used, but I'll probably change the oil again around 14k and will stick to around 7k intervals even on synthetic. Easy enough to track.
It depends if you're mostly highway or city driving. If you're all city and you use synthetic id go every 5-7k miles. If you do mostly highway like me I use Amsoil synthetic ill go around 11-12k miles on a change. If you do a good mixture of both maybe 8-10k miles. The car will usually do what it thinks is best depending on outdoor conditions (dusty, dry environment, etc) and tell you on the screen when to change it. Mine will usually show around 10% at 10k miles and I'll get the message on the screen around 11k ish miles.
The oil life monitor uses a sophisticated algorithm that determines the interval by measuring miles, oil & coolant temps, drive cycles, etc. and is generally a good indicator of when to change the oil. It can’t measure static time, so oil should be changed no longer than one year regardless of other variables.
I only drive mine about 3,000 miles/yr so it’s one year intervals for me.
The owner manual (if anyone cares to read it) says to follow the oil change indicator BUT never exceed 10k miles or 12 months. It also mentions 350 hours engine run time (specifically targeted for fleet vehicles).
Of course there are various opinions and never ending arguments about this subject. And some people stupid enough to avoid changing oil when needed. I personally follow what the factory recommends as I know there’s a lot done behind coming up with those recommendations. Obviously it doesn’t hurt changing it more often, like using a higher octane fuel even if it’s not required.
Whatever the system is it definitely seems to work, if I am driving off road on trails a lot and "abusing" mine more it definitely prompts me to change oil at less mileage/time!
Definitely! Over the years there were several improvements in the oil life software algorithms, engine manufacturing tolerances/processes AND changes in the quality of the oil itself (note changes in American Petroleum Institute's oil classifications). So changes are to be expected from year to year. Procedures should follow the model year of your vehicle (or more often if you so prefer). .
In my manual (2021 model year), it doesn't give any numbers, such as "never exceed 10k miles or 12 months", at least not that I could find. I'm curious if anyone who said that language is in the manual is actually referencing a 2021. It seems ridiculous to me that they would remove any mention of a max mileage/time.
My main reason for asking the question to begin with is to avoid having to get it changed in the middle of a vacation or something. If it only needs to be changed every 10K miles, and I'm about to take a 2,000 mile trip with the clock at 6,000, I won't worry about it. But if it's likely to tell me I need to change at 7K or 8K, I'll definitely want to get it done before setting off.
In my manual (2021 model year), it doesn't give any numbers, such as "never exceed 10k miles or 12 months", at least not that I could find. I'm curious if anyone who said that language is in the manual is actually referencing a 2021. It seems ridiculous to me that they would remove any mention of a max mileage/time.
ScottH12 bought a 2021 Grand Cherokee a month ago, and the owners manual basically just says, "change the oil when the car tells you to." My previous vehicle had a oil change indication too, so that's not new, but the manual still gave me a ballpark of 10,000 miles so I knew what to expect. Does anyone know if there's an official recommended interval, or if not, what is the interval you've experienced?
I change oil and filter every 5,000 miles. Easy to monitor/remember. This is probably overkill, but I want my engine to last.
I change mine in our 2020 Trailhawk 6cyc every 5-6k or 6 months (which ever comes first.) Oil changes are cheap, engines are not. You'll never hurt a vehicle changing them more frequently than not.
A popular misconception. Stripped filler bolts, tech forgets to fill with oil, loose oil filter that you don't notice until oil drains out, reused oil, incorrect oil. Plenty of ways to hurt an engine by a simple thing like changing it. Statistically it turns out, with todays engines and synthetics, that changing the oil more often than recommended reduces engine life.
Anyway use factory approved oil, Mopar filters or better, follow the owners manual. In our fleet of trucks we change oil per analysis, or 30,000 miles whichever comes first, and the trucks routinely reach 300,000 miles without engine issues. Rarely are they changed early, and those engines typically have another issue.
If you have an engine failure, its due to a factory defect, nothing you do can correct that.
Since oil threads usually become peeing contests, I'm closing this one.
I am with you on that, these seem sensible intervals, I just don't get the guys that think they need to do this every 3,000 miles, Maybe in the 60's, 70's but not now.
I have worked at a GM dealership for 43 years as a GM master tech and Ase Master Tech plus lots of training. Here my opinion Oil life uses an Algorithm speed, engine temp, load, and other parameters. Oil life in a late GM car and trucks is a joke It's usually low on oil because most of the new vehicles today use a real light viscosity oil and the engines are more dependent on the oil now than ever (because of camshaft actuators). It depends on how you drive do not go by the oil life monitor. If you drive a lot and on the highway and depending on conditions recommend 5000, If you drive it short distances 3000. I know I am not giving actual jeep specifications but all through the car lines Honda through GM has this concern. I would monitor the oil usage(most new vehicles use oil).
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