Do it every 65k

>>28997611
entirely depends what you're driving.

something good like an fd rx7? sure go for it.

something gay like a fwd honda Automatic only plastic engine wrenchlet shill bugmobile slop show gay pikachu spic buy an ad faggot rice leasebox for arabs ESL mcdonalds you're brown

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>>28997614
what did i just read

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10k is absurd despite what they claim these days. you've literally burnt at least a quart of oil by then. 5k in long as is. 3-4k is better.

>>28997611
Owners manual says every 10k because that number includes buying their next vehicle after the warranty period expires. Auto "experts" say every 3k because that's the safest, even if it's wasteful. The ideal is far more complicated since every oil is different and every vehicle experiences a unique service life meaning oil needs are unique vehicle to vehicle. A car driving in the city stuck in grid lock might do only like 10 miles an hour but the car has been running for an hour in a higher temperature state thanks to less airflow, those conditions are very different from steady expressway conditions which gains more mileage for the same amount of time.

>>28997611
Boomers/retards will tell you 3-5k. Manufacturers will say 15k. Best way to tell is run a longer interval and send a sample to blackstone. I drive a car with a modern di turbo engine and do 7-10k depending on how much highway driving I do.

>>28997625
>>28996780

>>28997611
Do your next change at 4k, get it tested, then do the next couple at longer intervals and compare the results

Hijacking, why does the oil in some 4 tackts engine get absorbed but in cars you need to drain the oil.

>>28997639
it literally doesn't matter how high quality your oil is, you are 100% burning a significant amount of oil at 10k intervals. even on a relatively new car. on high mileage cars, you can literally burn a quart at 3k miles. you can avoid having to waste money and time checking and adding oil by simply just changing it every 3k. there is a reason cars in the 90s lasted to 250k miles easily and cars now take shits at 100k despite being better tech, efficiency, and tolerances. if you don't give a fuck about your car because you trade it in every 6 years, do 10k. otherwise do 5k maximum. if you have a powertrain that is known to burn some oil, you better even be checking the levels at 3k. I've changed oil on vehicles that aren't even 10 years old yet and only got like 3/4 of the capacity out. kek

>>28997611
Yes and no

8k in a hybrid
6k in a NA
5k in a turbo

These are 'safe' numbers, you can go higher but you'll probably compromise in some way like varnish buildup.

3k max in a turbo car you redline a lot.
5k max in an NA you redline a lot.
You can go 1-2k over if you drive like a puss-ass.
If you do the kind of track days where you're redlining for an hour+ straight, maybe change every 1k miles.
People have been saying "modern cars and oils are magic so I don't need to change" for at least 30 years. But the laws of physics, heat, and materials science have not changed.

>>28997611
My car burns a quart every 1k miles that means by 4k I have new oil so I never need to change oil anyway

>>28997611
send your oil out for analysis. https://www.blackstone-labs.com/
my buddy has a lexus and does 10k synth oil changes. sends a sample out once a year, zero issues.
as long as you check your oil level at least once a month, and the report says its fine, you'll be good.
if you do an oil change and the car feels more peppy, then do it sooner next time.

>>28997692
>my buddy has a lexus and does 10k synth oil changes. sends a sample out once a year, zero issues.
The price of an oil analysis is the price of an oil change. Why not just change it twice a year because it WILL be better for the engine than a printout of what's in your old oil?

>>28997716
because an oil analysis will tell you everything you need to know about your engine, and warn you of any potential issues so you can dump the car.
and a single $40 analysis tells you that you're good with the 10k invertvalve, that will save you money in the long run.
after that its up to you how often you want your oil analized.

>>28997655
What kind of dogpoop car do you drive that burns (this much) oil?
My '06 BMW 316i does not need any top off between oil changes after I did the valve stem seals(known issue for this engine). Oh it's also leaking some from the oil pan gasket.

>>28997719
>because an oil analysis will tell you everything you need to know about your engine, and warn you of any potential issues so you can dump the car.
Those issues wouldn't come up as quickly with 5k oil changes. I have known about blackstone labs oil analysis for idk 20 years. It's great, but it doesn't replace proper oil changes.
People think "my lab results are good, I can go 10k miles" but they are destroying their cars. You should do 3k turbo, 5k NA and send out for analysis sometimes. A newer car won't show a lot of stuff, but it will in a couple years if you neglect oil changes.

>>28997725
Like, dude. It's 4:40, I've got to go feed my 4 chicken coops, 7 dogs, and 3 goats. I do that twice a day. Oil changes take less time than that does. Why not just do it at the actual right intervals? 3/5k. It's not difficult.

>>28997725
No one said its a replacement, its to monitor your engine's health.
>"my lab results are good, I can go 10k miles" but they are destroying their cars
how are you coming to that conclusion?
>I have known about blackstone labs oil analysis for idk 20 years.
ok, have you used them at least once? sounds like you never did
they have good SME that keep a history of your engine and write you a good report explaining what's going on.

>>28997726
>0440
A literal indoasian

>>28997727
No, I never used them. But I've been a mechanical engineer for 15-20 years. Why not just change at the proper (non the manufacturer's suggested) interval? It can only prolong the life of the engine and costs $45 and 10-15 minutes. Super easy, barely an inconvenience.
Obviously low-mile cars will have clean results, that doesn't mean it's wise to extend your oil change interval.

>>28997731
Alabamian.
I wish I was in Indonesia, desu, I hear they party hard and have beautiful scenery.

>>28997732
>why should I go to the doctor, i've been eating healthy my whole life!

>>28997736
Are you really trying to justify 10k oil changes because some lab told you that, for now, your engine is fine? You're paying $40 to save doing a $40 oil change. Why would running oil for longer be good for the engine? Wanna explain that?

>>28997738
I'm not going to argue with an Albanian.

>>28997741
Okay, enjoy having your engine fail early just because "printout say engine gud," this means I can neglect maintenance.

>>28997744
Crank bearings failed at 80k? Say whaaaaaaaat?
Imagine that.
It's basically the only thing you need to do for an ICE car for 10 years. My air filter is in a fucked position and my arms aren't quite long enough. But it's 10 minutes, including lifting, getting the tools, and lowering. Why get so obsessed with not doing it? You're only hurting yourself.

>>28997751
>air filter
oil filter

>>28997751
An oil analysys just tells you, without a doubt, if parts are wearing prematurely or not. If the concentration of wear indicators is in the same range with 5k or 10k changes, you're outright not seeing any benefits from the shorter interval.

>>28997758
"A fool and his money..."
Obviously a newer engine will show fewer signs. That doesn't mean you can extend intervals forever without causing damage. It shows up in due time.
You think you're big time scientist because you got a printout from a lab, but you won't change your oil properly. Just saying.

>>28997636
>Auto "experts" say every 3k because that's the safest, even if it's wasteful

Auto {{{experts}}} are the ones charging you for the oil and oil changes, of course they want you constantly changing your oil.

And come on, fuckloads of cars are leased, you think Mercedes wants to deal with a cooked engine in 3 years?

Constant oil changes are a fucking scam. You see this too in places impacted by dealership models- the same fucking cars in the US will have much shorter oil change intervals in order to let dealers milk you for more. Europe will have 7500, 10k intervals on synthetic and they do fine.

>>28997629
You just throw in a quart of oil, easy peasy.

>>28997611
Yes, you are wasting money. With full synthetic every 7500-10k is fine.

If you're paranoid you can change it at 4k and send in an oil sample for analysis and get a report that says it's basically brand spanking new. Adjust intervals upwards and discover I'm correct.

Basically if you don't agree with me, why the fuck is 4k, 3k the correct interval? Why not 2500? 2000 miles? Clearly the safest thing is to change the oil every time you get gas.

>>28997611
0w20 lol

Every 5k. At around $5/qt (in 5qt jugs) even a large v8 will only cost $35-40 in oil plus another $10 for a good filter and 30-60 minutes of your time. Driving 20k a year (almost double the national average, very uncommon) and doing 4 changes a year, that's $200 a year and $2000 over a decade. How much does it cost to rebuild a fucked engine? How about a full replacement? What about buying a whole new car?
Obviously a diesel truck costs a lot more in oil vs a gas truck or car, but even doubling your oil costs pales in comparison to repairing or replacing a diesel.

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get it tested

>>28997809
>Europe will have 7500, 10k intervals on synthetic
Because of green emissions bullshit. If they recommend 5k oil changes they lose green points.

>>28997762
Engine age is a non factor. The analysis shows you what is wearing and how much. If the oil has similar levels of particulates at 5k and 10k then no additional wear or "damage" is occurring.

>>28997625
>>28997614
fd rx7 probably is better to do every 3k (depending on how you drive).
If you drive hard or do lots of short trips (a few miles each time) then you’ll need to do more often than every 5k. Every 10k is bullshit designed to make total cost of ownership look lower than reality.

>>28997724
lexus v8s literally burn 1 qt every 1000 miles if driven hard (gs f / lexus lc)
you’re just trying to force reality to change to accommodate your poorfag wishes.

>>28997724
Modern engines burn a lot of oil. Some have 1qt/mile or more as an acceptable and normal oil consumption rate. There are lots of videos out there of cars getting their first oil change and the vehicles oil pan is bone dry.

>>28997684
I worked with a guy that treated his Chevy truck like that.
The oil filter eventually rusted through

>>28997611
If youre not going down to your friendly local car dealership for a Dexos Gold oil change every 3000 miles you dont care aboot your car

>>28997655
>you can avoid having to waste money and time checking and adding oil by simply just changing it every 3k
how does this take less time or cost less money than just checking it and topping it off every once in a while?

>>28997758
>>28997809
frequent oil changes are the #1 thing you can do to improve the lifespan of an engine. #2 is not buying engines made from plastic (difficult these days).
#1 is easy and cheap, #2 is a bit harder. I don’t understand this obsession with being penny-wise, pound-foolish. Even manufacturers who are trying to game the TCO numbers don’t recommend exceeding 5000 miles if you’re doing “heavy duty” driving, which if you look up their definition is stuff like city driving or short trips to the grocery store.

>>28997911
Sure, but why make assumptions when you can easily just have your oil tested and be certain about what state your engine is in?

You have to be a poor bastard to not just change your oil every 3-5k/miles. Literally one of the cheapest and easiest things you can do to ensure a long engine life. Manufacturers dont care if you wait 10-15k/miles because by then it wont be their problem.
I've done it before but oil analysis is really a waste of time and money for most people. Plus the real power of UOA for a non-fleet owner is tracking wear metals, not deciding if it's financially worth it to extend an oil change interval by 5000 miles.
TL;DR - dont be a dumbass. just change your damned oil.

>>28997907
because you know you're gonna have to replace the filter eventually anyways... unless you're a tard that thinks the stuff a filter strains magically disappears with the burnt oil. let's say you plan on changing the oil at 5k, but you have to add a quart at 4k. why even bother adding the quart of oil at 4k if you're gonna just change the oil again at another 1k?
>>28997724
most old cars with plenty of miles on them burn some noticeable amount of oil, combine that with small oil leaks that add up over months. also, most newer manufactured cars in the last 10 years burn a bit of oil. it's considered "normal" by manufacturers. some much worse than others.

>>28997818
New Toyotas run 0w8.

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>>28997809
it's how I give my car love.

More seriously it probably depends on your engine. If you had some chill as fuck NA engine that you drove like a grandma with, for long trips, yeah, sure, you are probably right. If you're running significant boost, or have some Subaru boxer engine about to be molested by uncle rodney, making pssshhhhhh sounds as you redline to costco, yeah, you should change your oil frequently.

>>28997915
because an oil analysis costs about as much and only measures a point in time? and you don’t have an automated system checking oil quality constantly so why risk going past the point where you start causing extra damage?

>>28997734
It was 0442 indoland when you posted your message
Very big coincidence there mr chinese spy

>>28997968
>and only measures a point in time
thats not how it works
the amount of particulates tell you what components are wearing and by how much since you last put fresh oil in
once you have a baseline you can predict how your engine will continue to wear and adjust your habits accordingly and you won't need to have it tested so often, just every once in a while to make sure you're still in the expected range

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>>28997970
I grew up in the military; I hate the military, I use civilian time to spite them. Not kidding. I'm almost 40 still bound by the military. Holy fuck I just want to live a civilian life.
I hate the US military so much, I was born into this, they kept me alive, but they won't let me leave.
AHHHHHHHHHHDazdsgdsgfdjyrfhgdskyrhswk7ur5hsywxklryhsfdg,n

>>28997684
All the gunk and shit still needs to be drained out even if you're constantly adding new oil. Fix the burning nigger use better oil than the super tech trash

>>28997614
>gay pikachu spic
god i wish that were me.

If the dipstick gets low I start hearing the VTC rattle, 5k max

>>28997976
How is 0440 civilian time?

>>28997629
Damn. Great performance all round

>>28997955
Next year theyll run 0w0