How strictly should I follow the 3,000 miles or 3 months rule?
I commute very long distances for work (90 miles one way, four days a week), so I find myself 'needing' oil changes often. Do I still follow the normal rule or since I am getting nearly constant highway miles, is there something different I should be or could be doing?

I drive a 2002 Ford Ranger and it is nearing 150,000 miles. Thanks!

what does your manual say? I would not change it any more frequently than recommended there. Perhaps less, since your highway miles are low stress on the engine, and your oil never even begins to get "old".

Every 5k

No, you probably don't need to do it every 3,000 miles. Even with dino, with road miles you can probably push to 5,000. With synthetic oil, you can probably go up to 7,500.

After your next oil change with whatever blend you're using, send your sample off to Blackstone Labs. They can give you a baseline of what's going on now, and if you can/should go longer or not.

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No, you probably don't need to do it every 3,000 miles. Even with dino, with road miles you can probably push to 5,000. With synthetic oil, you can probably go up to 7,500.

After your next oil change with whatever blend you're using, send your sample off to Blackstone Labs. They can give you a baseline of what's going on now, and if you can/should go longer or not.

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How strictly should I follow the 3,000 miles or 3 months rule?

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That is your grandfather's rule. It might have been valid at some point - but it is really just Jiffy Lube's business plan to make more money.

Highway miles are the easiest on an engine.

I have no idea what Ford says for that truck - but I would stretch to at least 5K.

Yep.

I'd check the levels fairly regularly, but extend it out from 3k, to 5k, and maybe even 7.5k. Whenever you get the next change, though, do what KY said and get Blackstone to take a gander at your old oil. That'll tell you a lot and whether keeping that range, or extending it, is possible.

Darn you Jiffy Lube!
So, I just checked the manual and it says 5,000 miles. I've been getting hosed! Well, I was stretching it past 4,000 anyway... But still.

I really appreciate the advice. I will surely push it out further now and save quite a bit of money. Commuting long ways really racks up the miles on the old truck!

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Darn you Jiffy Lube!

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Oil is cheap
At your current rate of 35k a year you will only save $12 a month changing every 5k instead of 3k. With conventional oil, after 3000 oil starts to break down and sludge up internals. $12 a month is cheap insurance on a 13 year old ford engine to help prevent excessive bearing wear.
I would follow the manual but be vigalent in checking for consumption at least weekly.

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Oil is cheap
At your current rate of 35k a year you will only save $12 a month changing every 5k instead of 3k. With conventional oil, after 3000 oil starts to break down and sludge up internals. $12 a month is cheap insurance on a 13 year old ford engine to help prevent excessive bearing wear.
I would follow the manual but be vigalent in checking for consumption at least weekly.

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The manual says 5000.


Jiffy lube is telling him 3000.

Do you have empirical data about conventional oil breaking down after 3000 miles?

Ahh....I was waiting for the cheap insurance post. Never backed by any data that says oil at 3000 miles is materially better than it is a 5000 miles.

If the Ranger consumes a bit of oil, just add some. It's fresh.

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Oil is cheap
At your current rate of 35k a year you will only save $12 a month changing every 5k instead of 3k. With conventional oil, after 3000 oil starts to break down and sludge up internals. $12 a month is cheap insurance on a 13 year old ford engine to help prevent excessive bearing wear.
I would follow the manual but be vigalent in checking for consumption at least weekly.

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The manual says 5000.


Jiffy lube is telling him 3000.

Do you have empirical data about conventional oil breaking down after 3000 miles?

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The ecoboost manual says 5-7.5-10k and how is that working out for stretched timing chains and oil dilution caused issues. Ecoboost.net is full of people having problems. A quicker oil change may not keep those things from happening, but it will negate their effects. The manual can say whatever it wants but is not accurate. Just look at subaru with their ring issue. Their manuals said 7.5k in the 14 model and now down to 6k in the 15s. Those people with oil consumption problems aren't able to just go in and say the manual says and get it repaired. They had to sue subaru. I'd stick to the 5k at most - $12 a month is less than you spend on one trip to the burger joint.

Go to 10K mile oil changes. Switch to synthetic if you're not sure about using conventional that long.

I'm commuting 115 miles per day in a dodge minivan that's currently got 338K miles. Engine's fine, uses 1 qt of oil per 3000 miles.

Things without wheels have oil change intervals based on hours. This makes much more sense to me. Consider the difference in miles between a cab idiling and driven in an urban environment vs the OP who commutes at fairly high speed.

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The ecoboost manual says 5-7.5-10k and how is that working out for stretched timing chains and oil dilution caused issues. Ecoboost.net is full of people having problems. A quicker oil change may not keep those things from happening, but it will negate their effects. The manual can say whatever it wants but is not accurate. Just look at subaru with their ring issue. Their manuals said 7.5k in the 14 model and now down to 6k in the 15s. Those people with oil consumption problems aren't able to just go in and say the manual says and get it repaired. They had to sue subaru. I'd stick to the 5k at most - $12 a month is less than you spend on one trip to the burger joint.

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I've never been one to push conventional past 6000 or so, particularly on a forced induction vehicle.

Stretched timing chains arent directly caused by long oil change intervals. Its purported the fuel dilution thats a result of long OCI intervals.

The same guy that has chain stretch is the dude that has a brodozer running 4.30 gears and 38" Tires and has his cats removed and some "offroad" tune with a K&N Filter and Flowmaster american thunder exhaust, and oil changes at Brake Check and Walmart. And his foots always to the floor everywhere he goes.

Also I think a lot of the issues that are being seen in the Forced induction vehicles out there are due to improper maintenance. I.e. letting walmart/quick lube place use substandard oil and filters, or owners really stretching out their maintenance requirements.

Every new tech has its issues.

Look at GM and their AFM 5.3L engines and oil consumption once out of warranty.

Not saying this is 100% the case, but it certainly doesnt help things.

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Oil is cheap
At your current rate of 35k a year you will only save $12 a month changing every 5k instead of 3k. With conventional oil, after 3000 oil starts to break down and sludge up internals. $12 a month is cheap insurance on a 13 year old ford engine to help prevent excessive bearing wear.
I would follow the manual but be vigalent in checking for consumption at least weekly.

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The manual says 5000.


Jiffy lube is telling him 3000.

Do you have empirical data about conventional oil breaking down after 3000 miles?

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Conventional oil starts breaking down from day 1 of use. That is why I have ran full synthetic since 1994 in everything I have owned. The longer you run conventional, the higher the build up of sludge will be in the engine over time. Do you want to argue that sludge is beneficial to engine life ? If you like increasing your chances of washing out a cam or rod bearing then keep extending intervals with it.

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Oil is cheap
At your current rate of 35k a year you will only save $12 a month changing every 5k instead of 3k. With conventional oil, after 3000 oil starts to break down and sludge up internals. $12 a month is cheap insurance on a 13 year old ford engine to help prevent excessive bearing wear.
I would follow the manual but be vigalent in checking for consumption at least weekly.

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Conventional oil starts breaking down from day 1 of use. That is why I have ran full synthetic since 1994 in everything I have owned. The longer you run conventional, the higher the build up of sludge will be in the engine over time. Do you want to argue that sludge is beneficial to engine life ? If you like increasing your chances of washing out a cam or rod bearing then keep extending intervals with it.

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So does it break down after 3000 miles or after the first day of use? You state both.

So should big rig drivers change their oil every 10 days?

Because I dont think they do.

I change my oil every day.

Cheap insurance.

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Oil is cheap
At your current rate of 35k a year you will only save $12 a month changing every 5k instead of 3k. With conventional oil, after 3000 oil starts to break down and sludge up internals. $12 a month is cheap insurance on a 13 year old ford engine to help prevent excessive bearing wear.
I would follow the manual but be vigalent in checking for consumption at least weekly.

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The manual says 5000.


Jiffy lube is telling him 3000.

Do you have empirical data about conventional oil breaking down after 3000 miles?

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The ecoboost manual says 5-7.5-10k and how is that working out for stretched timing chains and oil dilution caused issues. Ecoboost.net is full of people having problems. A quicker oil change may not keep those things from happening, but it will negate their effects. The manual can say whatever it wants but is not accurate. Just look at subaru with their ring issue. Their manuals said 7.5k in the 14 model and now down to 6k in the 15s. Those people with oil consumption problems aren't able to just go in and say the manual says and get it repaired. They had to sue subaru. I'd stick to the 5k at most - $12 a month is less than you spend on one trip to the burger joint.

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Does the ecoboost require full synthetic to maintain warranty coverage ?

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Oil is cheap
At your current rate of 35k a year you will only save $12 a month changing every 5k instead of 3k. With conventional oil, after 3000 oil starts to break down and sludge up internals. $12 a month is cheap insurance on a 13 year old ford engine to help prevent excessive bearing wear.
I would follow the manual but be vigalent in checking for consumption at least weekly.

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Conventional oil starts breaking down from day 1 of use. That is why I have ran full synthetic since 1994 in everything I have owned. The longer you run conventional, the higher the build up of sludge will be in the engine over time. Do you want to argue that sludge is beneficial to engine life ? If you like increasing your chances of washing out a cam or rod bearing then keep extending intervals with it.

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So does it break down after 3000 miles or after the first day of use? You state both.

So should big rig drivers change their oil every 10 days?

Because I dont think they do.

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Is the ranger we are discussing a diesel now ?

So you argument is conventional offers the same protection from 0-6000 miles and does not degrade and cause sludge build up in lifter bores, oil passages and rocker arms ?

My issue with conventional oil is people tend to exceed intervals recommended and 3000 becomes 4000 and 5000 becomes 7500. Oil is cheap. A rebuild is going to cost you more in the long run. Pay now or pay later it's your choice.

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Oil is cheap
At your current rate of 35k a year you will only save $12 a month changing every 5k instead of 3k. With conventional oil, after 3000 oil starts to break down and sludge up internals. $12 a month is cheap insurance on a 13 year old ford engine to help prevent excessive bearing wear.
I would follow the manual but be vigalent in checking for consumption at least weekly.

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Conventional oil starts breaking down from day 1 of use. That is why I have ran full synthetic since 1994 in everything I have owned. The longer you run conventional, the higher the build up of sludge will be in the engine over time. Do you want to argue that sludge is beneficial to engine life ? If you like increasing your chances of washing out a cam or rod bearing then keep extending intervals with it.

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So does it break down after 3000 miles or after the first day of use? You state both.

So should big rig drivers change their oil every 10 days?

Because I dont think they do.

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Is the ranger we are discussing a diesel now ?

So you argument is conventional offers the same protection from 0-6000 miles and does not degrade and cause sludge build up in lifter bores, oil passages and rocker arms ?

My issue with conventional oil is people tend to exceed intervals recommended and 3000 becomes 4000 and 5000 becomes 7500. Oil is cheap. A rebuild is going to cost you more in the long run. Pay now or pay later it's your choice.

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Well the question is, do you think oil automatically starts to sludge at 3000 miles and begins to destroy engines? Of course, if you go 20,000 miles and never change the oil, you're gonna have a bad time. The Million Mile Ford Van guy changed his oil every 10-20K miles.

Of course interval also depends on driving conditions. My vehicles get less than 5000 miles per year. I change the oil based on time and extended amounts of sitting. So yes, for the mom that drives the minivan to school and soccer practice and never gets the engine warm to operating temps, I suggest changes based on time vs mileage. For a guy who's a hot shot or courier driver, they may be able to push the intervals since their engines get up to operating temps and stay there all day. For OP, who is driving easy highway miles (as Spice also said), 5000 mile intervals would be sufficient to protect his engine.

The legndary flighterpilot also stated that he had issues with GMs OLM and suggested folks change at 7500 vs going on the OLM that was built into the cluster.

Most tractor trailer drivers run 12-15K on conventional, 3-5 times on synthetic with regular UOA checks.

Probably 95% of the population uses conventional oil, furthermore most of the people have no idea or could give a crap less of what oil was used or where they had the oil changed. they take the car to Kwik Car, Wal Mart, etc and tell the guys there "Change the oil..." they don't think about brand, weight, filter type etc. And I'm willing to bet those cars can hit 150K-200K without issue.

I've had customers drive their vehicles on conventional oil 10,000+ miles between OCI, and ran their vehicles (courier work) 300K miles without any issue. Many people on BITOG have shared their UOAs and the majority of them show most vehicles at the 3000 mile interval have plenty of life left and can keep going much longer than what Jiffy Lube has you believe.

So how often do you change your synthetic oil?

Not trying to pick a fight, just trying to get the right info out there. Just my .02

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Excellent post.

JuanAgs says Mobil Juan

Oil science has advanced significantly recently. We have a better understanding of how oils break down under different conditions, and can likewise optimize OCI based on when the oil has lost its value (like a can of coke losing its carbonation). Changing too fast can be pouring out good oil.

This does not negate the need to check your oil regularly, as the greatest danger is still a low oil level.

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Most tractor trailer drivers run 12-15K on conventional,

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The Cummins in our work trucks have an interval of 10k (from Cummins).These delivery vehicles are basically stop and go all day.

I think the dodge manual stated 5k for the same engine in my 2000 Ram. After the 100k warranty was out I went with the 10k interval on dino oil.

My car manual says to change the oil every 10k miles or once a year, whichever comes first. Some folks change the oil after 5k, but that seems more because of tradition than any hard data suggesting it's better.

The only problem with stretching intervals on oil changes is pushing off the other maintenance that typically only happens at oil changes well - air filters, tire rotations and balancing, brake inspections, etc. Not that this guy pushing from 3k to 5k is going to cause an issue, but doubling your service intervals could pose issues with tire wear if you aren't rotating them often.

I'm in the same boat, commute 190 miles a day, between 4 and 6 days a week. Ford tells me 5k, fleet tells me 5k, but I usually stretch to 7-9k because 95% of that car's life is spent on cruise at 76-81mph. But if I do have a slight vibration or steering shimmy or spend time in a dusty environment, I have those issues addressed right away and not at the next oil change.

I change the oil in our vehicles between 6-8K miles, so that I can rotate the tires at the same time. It makes things easier when the schedules line up.

My truck, I go 5kish miles. That's usually about 9-10 months.

GTI, I go 4500-5000 miles, at most. Manual says 10k. I beat the piss out of it though, so I just dump/fill early for sh/ts and giggles, basically.

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The same guy that has chain stretch is the dude that has a brodozer running 4.30 gears and 38" Tires and has his cats removed and some "offroad" tune with a K&N Filter and Flowmaster american thunder exhaust, and oil changes at Brake Check and Walmart. And his foots always to the floor everywhere he goes.

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Hell yeah. Bro do you even 'Murica?

The rib's ferd gets freshened after 5K. My 250 is every 5K with a blackstone every 10. My freightshaker with a DD13 got freshened every 20K.

not even sure 1ag owns a car long enough to even need to change the oil

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not even sure 1ag owns a car long enough to even need to change the oil

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