Oil Change Interval
Anyway, I did some searching and see some people here are changing every 5k or even sooner. Can I ask you all why? I always thought with newer, fully synthetic oils, you didn't have to worry about them breaking down so quickly and anything sooner than 7,500 at the lowest to 10,000 mile interval oil changes was just wasting money.
So, should I stick with the factory interval or increase it to every 5,000 miles?
Thanks!
Anyway, I did some searching and see some people here are changing every 5k or even sooner. Can I ask you all why? I always thought with newer, fully synthetic oils, you didn't have to worry about them breaking down so quickly and anything sooner than 7,500 at the lowest to 10,000 mile interval oil changes was just wasting money.
So, should I stick with the factory interval or increase it to every 5,000 miles?
Thanks!
I would argue that an oil change is a big deal. If you think it's for no reason after you're done with your research then stick to 10,000 miles.
Last edited by PeterUbers; Oct 27, 2022 at 03:49 PM.
I would argue that an oil change is a big deal. If you think it's for no reason after you're done with your research then stick to 10,000 miles.
Carbon debris? Like carbon buildup that's a byproduct of direct injection fueling? How does that get into the lubrication system? Then if it is, are people doing an oil analysis at their oil changes and finding this? I'm familiar with other direct injected motors having carbon buildup issues but that never got into the oil. But obviously there could be something different with this motor on why/how that happens...
As for oil burning, I carry a spare quart in the car and have extras in the garage. I top off when the warning hits the dash. I'm averaging about 1 quart for every 2,500 miles. Are you topping off before the light goes off?
I am trying to research and not finding much evidence, just people saying it makes them feel better to do it every 5k (or even sooner!).




Car has 33k miles (2015), which I picked up in 2018 with 6500 miles.
FWIW I burn no appreciable oil in that time period. I drive aggressively, but not as hard as others on this forum.
I think it is hugely dependent on the type of driving that you do, and if you ever get the car fully warm. Short drives where vehicle never warms up is never good.
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I do wonder about new synthetic lubricants beginning to appear. For example, new Mobil 1 FS 0W-20 good for 20,000 miles. Found a 4-year old video by Jason Fenske on this topic. Recommended.
Last edited by maxusa; Oct 28, 2022 at 03:20 AM.
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Carbon debris? Like carbon buildup that's a byproduct of direct injection fueling? How does that get into the lubrication system? Then if it is, are people doing an oil analysis at their oil changes and finding this? I'm familiar with other direct injected motors having carbon buildup issues but that never got into the oil. But obviously there could be something different with this motor on why/how that happens...
As for oil burning, I carry a spare quart in the car and have extras in the garage. I top off when the warning hits the dash. I'm averaging about 1 quart for every 2,500 miles. Are you topping off before the light goes off?
I am trying to research and not finding much evidence, just people saying it makes them feel better to do it every 5k (or even sooner!).
Last edited by PeterUbers; Oct 28, 2022 at 08:29 AM.
A question I had during the video though, I've always checked oil level at temperature, but it sounded like Tasos mentioned doing it cold. I didn't catch why he said to do it that way though.
Long change intervals specified by the manufacturer should be viewed through the lens of competition and cost and what can minimally be done under normal circumstances.
- Competition: When your competition is promoting minimal maintenance as a selling point, for the non-enthusiast buyer, stating you have to perform maintenance twice as often is a negative.
- Cost: Most new cars come with free maintenance during the warranty period. While that is a selling point, the manufacturer/dealer doesn't want to give away more stuff free than they can get away with. Also, any long-term damage will show up in the long term, well beyond the warranty period. This also becomes an income source for the dealer as they can now fix (and charge you for) what could have been avoided.
- Normal Circumstances: Rarely are normal circumstances anything like real-world circumstances. How often does the Operator's/Owner's manual say to perform some maintenance item (oil and filter change, air filter change, etc.) more often if you drive in city traffic, tow some kind of trailer, operate in dusty environments?
Last edited by JettaRed; Dec 6, 2024 at 06:59 PM.
Long change intervals specified by the manufacturer should be viewed through the lens of competition and cost and what can minimally be done under normal circumstances.
- Competition: When your competition is promoting minimal maintenance as a selling point, for the non-enthusiast buyer, stating you have to perform maintenance twice as often is a negative.
- Cost: Most new cars come with free maintenance during the warranty period. While that is a selling point, the manufacturer/dealer don't want to give away more stuff free than they can get away with. Also, any long-term damage will show up in the long term, well beyond the warranty period. This also becomes an income source for the dealer as they fix what could have been avoided.
- Normal Circumstances: Rarely are normal circumstances anything like real-world circumstances. How often does the Operator's/Owner's manual say to perform some maintenance item (oil and filter change, air filter change, etc.) more often if you drive in city traffic, tow some kind of trailer, operate in dusty environments?
Manufacturer’s motivations vs Owner’s motivations.
Leasor/renter’s motivations (who will return the car back at the end of a few years of driving) vs real owner’s motivation (someone who will keep the car for the long haul). Etc.
I change my oil every 5000 miles and till date, the cars have performed without a single hitch. My prior ML went to mid-200Ks of miles, with not a single problem, till I donated it.












