I wouldn't push it pass 5K miles with normal motor oil. I change my oil in my mustangs about every 2500 miles.
what's the longest you can go without changing your oil
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CanadaStang
New Member
1990BLUEGT said:Tell me when you guys are selling your cars so I can tell friends and family not to buy them
I've have many vehicles, one being a 93 2.3 ranger that I bought new in 1993. I had a employee who lives a long distance from my shop who drove it for about 40,000 miles in the mid 90's without a oil change! ( wouldn't reccomend it) he put a quart in about every 5000 miles and we did'nt change the filter until it rusted out! BTW the truck has 160K on her today and is still running great and uses no oil 
Anything under 7500 miles on a normal daily driver is fine! Performance vehicles IMO under 3K
Anything under 7500 miles on a normal daily driver is fine! Performance vehicles IMO under 3K
CanadaStang
New Member
My brother owns an engine rebuilding company, most of his business comes from dealers [Ford, Chrysler, GM] 90% of the rebuilds are due to lack of proper oil change intervals.
PULMEOVR
I need a bigger E-Penis.
No offence, but those of you who are changing your oil every 6000 miles or higher (pause) Congratulations, you will be wearing and tearing your engine for no reason at all. Not to mention all the slodge build up in your engine just cause you guys are lazy sons of ..... Anyways if you wait for 6000 miles all you are doing is shortning the life of your engine.
I mean really what does it cost to do an oil change these days... peanuts. I do mine just before 3000 miles. I have had my car for a year now and I am just about 400 miles shy of 9000 miles ... Guess what I am doing this weekend....?????
I mean really what does it cost to do an oil change these days... peanuts. I do mine just before 3000 miles. I have had my car for a year now and I am just about 400 miles shy of 9000 miles ... Guess what I am doing this weekend....?????
Maybe I'm the only one reading 2 questions here:
On first read, I think this is a physics question. How long will oil last in your car before it breaks down (oil or car). I knew a guy who made it to 12,700 on an oil change before encountering a problem. They had to sit on the car on the lift for a couple of hours to get the oil out. An old friend of mine drove a Suburban on the same oil for over 40,000 and he rolled in an accident, so it probably could have still gone for more miles. Both of these happened with conventional oils, so my best guess is probably 20,000 - 30,000 miles.
On a second read, I think you mean changing oil by preference. How long do I feel comfortable with the oil in my car? I think everyone is answering that. Synthetics can last for quite a lot of miles, so there isn't much difference between those replies given a decent quality filter, as that may be the true limiting factor.
On first read, I think this is a physics question. How long will oil last in your car before it breaks down (oil or car). I knew a guy who made it to 12,700 on an oil change before encountering a problem. They had to sit on the car on the lift for a couple of hours to get the oil out. An old friend of mine drove a Suburban on the same oil for over 40,000 and he rolled in an accident, so it probably could have still gone for more miles. Both of these happened with conventional oils, so my best guess is probably 20,000 - 30,000 miles.
On a second read, I think you mean changing oil by preference. How long do I feel comfortable with the oil in my car? I think everyone is answering that. Synthetics can last for quite a lot of miles, so there isn't much difference between those replies given a decent quality filter, as that may be the true limiting factor.
There are two main things that happens to oil to make it bad.
1. Contaminants
2. Thermal and chemical breakdown
Under normal driving conditions ie. not thrashing it, even a conventional motor oil will retain good viscosity, detergent qualities and low contaminants for 5-6000 miles provided that the air filter and oil filter are quality ones.
With a synthetic you can go many many more miles because most if not all synthetics resist breakdown way better than conventional oil but the problem is contaminants.
I run a fleet of 20 trucks most are 1 ton ford powerstrokes and 454 chevys with 5 5.4's mixed in. We use conklin parasynthetic oil at 15000 mile intervals for gas motors and 20000 mile intervals for diesels. The filters get changed at every 3000 miles and an oil sample is taken. I have yet to get a sample back indicating abnormal contaminants or any kind of breakdown and these things are running from 10-12 hours a day in the worst conditions, stop and go city traffic with alot of idling mixed in. They also are loaded to max gvwr all day long. We also have not lost a motor in 4 years and the ones that we have had the valve covers off have not had one bit of sludge on anything.
If you want to run extended service intervals make sure you have quality filters and you at least change the oil filter a couple times. If you dont feel comfortable then change it every couple thousand.
1. Contaminants
2. Thermal and chemical breakdown
Under normal driving conditions ie. not thrashing it, even a conventional motor oil will retain good viscosity, detergent qualities and low contaminants for 5-6000 miles provided that the air filter and oil filter are quality ones.
With a synthetic you can go many many more miles because most if not all synthetics resist breakdown way better than conventional oil but the problem is contaminants.
I run a fleet of 20 trucks most are 1 ton ford powerstrokes and 454 chevys with 5 5.4's mixed in. We use conklin parasynthetic oil at 15000 mile intervals for gas motors and 20000 mile intervals for diesels. The filters get changed at every 3000 miles and an oil sample is taken. I have yet to get a sample back indicating abnormal contaminants or any kind of breakdown and these things are running from 10-12 hours a day in the worst conditions, stop and go city traffic with alot of idling mixed in. They also are loaded to max gvwr all day long. We also have not lost a motor in 4 years and the ones that we have had the valve covers off have not had one bit of sludge on anything.
If you want to run extended service intervals make sure you have quality filters and you at least change the oil filter a couple times. If you dont feel comfortable then change it every couple thousand.
PULMEOVR
I need a bigger E-Penis.
rickster99 said:
Hey, I have no problem with people changing their oil every 2,500km or whatever. More power to you. I change my oil every 6,000 km (3750 miles) and this is VERY early to be changing my oil. I run Mobil 1, synthetic with a Mobil 1 filter. Mobil 1, use to guarantee their oil for 12,000 miles. Amsoil has, what, a 25,000 mile guarantee? When you run a quality synthetic oil, it will last you a long time before it breaksdown. Many people are reluctant to believe this because this is not what the manufacturers tell you (they want you to spend more $$$). What is important is that you do filter changes every so often, in oder to keep the oil well filtered. This is very important, because this WILL gum up, and break down your engine.
There will be more people to chime in with stats etc. as well I'm sure.
But seriously though, do some research and you'll understand.
Matt
Well watch this...if YOUR oil and filter, as well as your oilpan/camcovers/galleys, etc. show ZERO sludge...no matter the miles...your oil has been changed often enough. It hasn't broken down yet. If it burns no oil, there are more than likely no large particle contaminants.
Now that it IS YOUR Mustang...do the right thing and your motor has the capability of lasting a long, long time.
I'm about to turn 115K on the odo. I use a little oil nowadays (normal), but after religious Amsoil usage/5k changes on my part, plus DEALER service by the original owner, this thing runs amazingly like new! The oil NEVER shows/feels dirty.
Just fact: keep the filter changed...period. Don't let the oil level run too low for ANY length of time. NEVER give your oil the opportunity to break down or pick up accumulated contaminants, and you should NOT have any oil/oil change related failures!
Like I said before...peace of mind=5k (me personally of course)...pushing it=6k (now worried about filter)...too sick to do anything or too poor to change my oil=10k (with a filter at 6k)...after that...well...when it looks bad (too dark, burned, sludgy)...it's too late dude!
All in good humor kids, but the truth is just keep your SYNTHETIC changed as often as you possibly can...seriously, unless you REALLY don't care about your Stang!
Can I get an AMEN to that, my brothers?
Now that it IS YOUR Mustang...do the right thing and your motor has the capability of lasting a long, long time.
I'm about to turn 115K on the odo. I use a little oil nowadays (normal), but after religious Amsoil usage/5k changes on my part, plus DEALER service by the original owner, this thing runs amazingly like new! The oil NEVER shows/feels dirty.
Just fact: keep the filter changed...period. Don't let the oil level run too low for ANY length of time. NEVER give your oil the opportunity to break down or pick up accumulated contaminants, and you should NOT have any oil/oil change related failures!
Like I said before...peace of mind=5k (me personally of course)...pushing it=6k (now worried about filter)...too sick to do anything or too poor to change my oil=10k (with a filter at 6k)...after that...well...when it looks bad (too dark, burned, sludgy)...it's too late dude!
All in good humor kids, but the truth is just keep your SYNTHETIC changed as often as you possibly can...seriously, unless you REALLY don't care about your Stang!
Can I get an AMEN to that, my brothers?
VPStang
Founding Member
mobil 1 synth 10,000 miles at least....under normal driving that is....thats a huge YMMV......if u use a regular Motorcraft filter00like most people in here....change it every 3 or 4 thousand miles.......You'll get great protection and even save money in the long run....M1 filters are expensive...and to my knowledge theres no such thing as an anti clog filter---so buy mCraft and change often....
VPStang
Founding Member
And by the way GUYS--as I've posted several times before--M1 synth is on sale at P3Pboyz for buy 3 get 3 free...just buy a calendar at the front desk....i've stocked up and going back for more--expires Dec 31......enjoy
mikes2008gt
Founding Member
Ford says 5000 miles. I try to do mine as close to 3000 as I can. Of course you would have to ask this NOw....while I'm sitting close to 4000 miles on the last oil change. 
But I believe if Ford says 5000 is what they recommend, they probably know what they're talking about. 
But I believe if Ford says 5000 is what they recommend, they probably know what they're talking about.
Donw35
New Member
If you asked the oil companys, they would say every 1000 miles 
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I change mine every 3000 miles, or before and after a Trackday.
Just my 2 cents.
,I change mine every 3000 miles, or before and after a Trackday.
Just my 2 cents.
3mo/3000 miles. why screw with the most expensive part in your car because you didn't want to do the least expensive maintenance part?
You CAN go 6000 or way more on the oil if you change the filter, but if your going to spend the time getting under the car to change the filter, why not spend the extra 10 minutes and do the oil too? Unless your running fleets of vehicles where the cost would get prohibitive, theres no reason not to change it.
You CAN go 6000 or way more on the oil if you change the filter, but if your going to spend the time getting under the car to change the filter, why not spend the extra 10 minutes and do the oil too? Unless your running fleets of vehicles where the cost would get prohibitive, theres no reason not to change it.
spikeGT_99 said:
Mobil Oil Australia Limited Technical Bulletin #863 states: “…oil does not “wear out”, “break down” or otherwise deteriorate to such an extent that it needs to be replaced. What happens is that it becomes contaminated with water, acids, burnt fuel, carbon particles, and sludge so that it can no longer provide the desired degree of protection for engine components. But, it will be argued, most modern vehicles have an oil filter. Why does this not remove contaminants? The answer here is that a filter can only remove solid particles above a certain size. It cannot remove water, acids, or fuel dilution, all of which pass through the filter just as readily as the oil.”
I routinely change my oil and filter every 3K miles. I run Mobil1 5W30 with a Mobil1 filter. I do this only for my piece of mind and because I enjoy tinkering with my vehicles. On the other hand most synthetics including Mobil1 are capable of going much further than that. But, pushing your change invtervals past what the Manufacturer recommends is just asking for trouble unless you regularly have your oil tested so you know what is going on. This is true even for oils like Amsoil where they suggest drain intervals from 7500-15,000 miles. You still need to know what is going on with the motor. Blind faith, just because the label says you can go 7500 miles or more is just asking for trouble.
I send my oil and ATF to Blackstone Labs. It costs 20 bucks and they will send you the sample containers for free. You just fill the sample bottle, fill out the form, enclose a check for $20 and mail it to them. They will email you a detailed analysis of the oil and can guage the wear of your motor from the metal traces in the sample.
I send my oil and ATF to Blackstone Labs. It costs 20 bucks and they will send you the sample containers for free. You just fill the sample bottle, fill out the form, enclose a check for $20 and mail it to them. They will email you a detailed analysis of the oil and can guage the wear of your motor from the metal traces in the sample.
FallenPhoenix
New Member
I haven't even hit 4k on mine yet, change it first time ~1200. I'll probably change it again at 6k and then every 5-6k after that using only synthetic oil and filter.
Regardless of miles I wouldn't feel good leaving the same oil and filter in for anything over 6 months, and that's with synthetic. Regular dino oil I'd change every 4-5k or 3 months regardless, depending on conditions and how hard you push it.
Regardless of miles I wouldn't feel good leaving the same oil and filter in for anything over 6 months, and that's with synthetic. Regular dino oil I'd change every 4-5k or 3 months regardless, depending on conditions and how hard you push it.
when you wash your clothes do you have it hooked up to recycle the water or does new water come in for the next load?
basically im sure your wash water can do a couple of loads, rinse would be a joke but none the less maybe you could install a filter for the water. but eventually the water will become saturated with too much dirt, grime, drool, etc to effectively clean your clothes. however you can still argue that you "washed your clothes" doesnt necessarily mean you washed them clean.
and yes oil is always oil (the additives on the other hand burn off and deteriorate over time/heat)and if your oil comes out clean, then did it ever remove anything from your motor? or is your filter that good???
the point im trying to make is yes full synthetic is better at protecting and lasting longer, however in the same amount of driving time within up to 2k miles it can become just as saturated as conventional oil.
and I know both sides have a valid point and it always seams to be fairly split on whats best. for 45% its 3k for 45% its 5/6k and for the remainder it seams to be up to 12k.
I do both my cars every 3k. buts thats me and thats what i am happy with. the fact that most people end up going 8k on conventional with their everyday cars vs the fact that most owners of stangs are within 5k religiously shows just y they seem to hold up so well.
as far as im concerned stay within 5k using factory filter and you should be fine with whatever way you decide.
basically im sure your wash water can do a couple of loads, rinse would be a joke but none the less maybe you could install a filter for the water. but eventually the water will become saturated with too much dirt, grime, drool, etc to effectively clean your clothes. however you can still argue that you "washed your clothes" doesnt necessarily mean you washed them clean.
and yes oil is always oil (the additives on the other hand burn off and deteriorate over time/heat)and if your oil comes out clean, then did it ever remove anything from your motor? or is your filter that good???
the point im trying to make is yes full synthetic is better at protecting and lasting longer, however in the same amount of driving time within up to 2k miles it can become just as saturated as conventional oil.
and I know both sides have a valid point and it always seams to be fairly split on whats best. for 45% its 3k for 45% its 5/6k and for the remainder it seams to be up to 12k.
I do both my cars every 3k. buts thats me and thats what i am happy with. the fact that most people end up going 8k on conventional with their everyday cars vs the fact that most owners of stangs are within 5k religiously shows just y they seem to hold up so well.
as far as im concerned stay within 5k using factory filter and you should be fine with whatever way you decide.
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