Why do most of you do an OCI of over 3K???

[greaseball]

My strict OCI is 2,000 miles. Synthetic, regular, or whatever you want. I have purchased used auto's and just by looking into the valve covers can tell the OCI was 'manufacturer recommended'(their in the business of selling cars, NOT oil). So why would all of you enthusiast try to get 7500 or 10K from oil? My exception is that when I have a road trip of 500 miles thrown in, I may extend the OCI.

 

[Cutehumor]

are you seriously trying to tell us that 2k oci is the best for engine protection?

 

[Triple_Se7en]

I think poster greaseball is basically looking at a dirty engine and dirty dipstick in his post - how to alleviate/lessen/diminish it. Some of us (I do 3K dino & 5K Synthetic) don't like our oils to get too dirty - you know!

 

[toocrazy2yoo]

Well, you didn't mention the car you do these 2000 mike OCI's, but most of us do the Dino 3-5K and Synthetic twice as long. I do. Less is a waste of oil, and besides, my filter sucks to get to. My owner's guide allows 7500 mile OCI, so no issues there, and that's the OCI for me, on Syn. But with dino, 5000 is tops, 3500-4000 MINIMUM.

But look, no dilema, Greaseball..When you change that synthetic at 2000 miles, send the "old" oil to me, be happy to take it off your hands..

 

[addyguy]

Simple answer: because modern PCMO's will comfortably protect an engine for 5000-7500k miles, and it is a waste of the oil, your money and your time to change it sooner.

This is the early 2000's, you know, not the 1970's - oil has come a long way, and modern conventional oil provides the same protection up to about 7500 miles that synthetic will.

But, in the same breath, it is your time and money, and if changing your oil that often makes you happy and feeling like you are protecting your car the best, then go for it!

 

[greaseball]

At 2,000, many times the oil has come out dark brown, and in any used car I've owned, it has come out black. Oil starts to loose whatever it uses to pick up dirt particles. Sure the oil still works at 3-5K, but I don't think that it will still be cleaning your engine at that point. Say, if you lease your car go the max allowed, but if you want to keep it for a long time I would do it more often. Owners manual doesn't allow Syn to go any longer than dyno. I wonder if we will ever hear about anyone that has a car with about 250K on it???

 

[Eddie]

2,000-3,000 mile OCI on a daily driver is a waste of time, money & resourses. I do 6,000 mile OCI on Mobil 1. I sell my cars running very well without oil issues at 127,000 -196,000 miles.

 

[Pablo]

My Volvo turbo. 270K. 10K oil changes. If you change oil at 2K, you are wasting precious natural resources.

 

[bar1]

3K OCI hasn't been around in Europe since 1980. Most European cars use OCI from 7.5K to 18K miles.

2K OCI seems like a waste, but it's your decision.

 

[GMorg]

Do you replace your tires when only a third of the tread is gone? I know it sounds silly, but it is a very similar question. Maybe if tires were the cost of an oil change, they would get changed more often too.

 

[benjamming]

Color is not the best way to tell an oil's condition. Search around the UOAs some as well.
For a used car, I would run Auto-RX to do some cleaning resulting from overly long OCIs or whatever the case may be. You can't judge much about oil needing to be changed on the oil coming out of a used car. They may have forgotten a couple oil changes in there as well as the quick lube place may have "forgotten" to actually change the oil as well, SA rated oil may have been used, etc.

There is a recent thread on here about going 200k miles on 5W20.

 

[greaseball]

I have looked in valve covers that have 41K, and I have seen a collection of 'black wax' in there. Then I hve seen engines with ridiculous OCI, but at 26K, you can use it to cook in/on. Clean as a whistle!

 

[ARB1977]

Show us proof that 2K oil change intervals are best, if you do a search im sure youll find outstanding UOA's with 10K or more.

 

[simple_gifts]

Quote:

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So why would all of you enthusiast try to get 7500 or 10K from oil?

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because I can.

 

[cfromc]

Hasn't it been shown that wear actually increases for the first 1000-2000 miles after a fresh oil change and then the wear rate levels off from about 2,000 miles until ~10,000?

 

[michaelc80]

Greaseball,
It's clear that despite all of the proof here to the contrary you're set on doing 2K oil changes. If that makes you happy, then I say go for it.

I'm sure others here will admire your ability to stick to what you believe in-all the way to the bank.

 

[AEHaas]

Quote:

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Hasn't it been shown that wear actually increases for the first 1000-2000 miles after a fresh oil change and then the wear rate levels off from about 2,000 miles until ~10,000?

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Almost certainly the reason some people think this may be true is that UOA shows elevated wear metals in solution after the first thousand miles or so. It is probably that the stronger detergent capabilities from fresh oil loosen deposits that cause the elevated metals in solution.

aehaas

 

[HTSS_TR]

If all OCI's are 2k miles instead of 6k miles, oil companies will sell 3 times as much oil. Who has the interest of convincing car's owners to do 2k miles oil change ? Car manufatures want customer happy in buying reliable cars and they test their cars very carefully. In the other hands, car dealers, Jiffylubes ... want you to change oil at 3k miles or less so that they can smile while walking to the bank to deposit extra cash to their accounts.

Th current oil is SM not SE of the 1970's. My car OCI's are 1 year or up to 15k miles with synthetic oils. There is no sludge in '94 LS400 with 170k miles.

 

[cfromc]

I know every year I've pushed the OCIs a little longer. I'm down to once a year on my motorcycles, once every 9 months on one car and I will be trying once a year on another car. I just don't miss doing an OCI in the winter when its below freezing, nor do I miss going to drop off my used oil 2-3 times a year. I'd rather buy synthetic oil and a better filter than buy the cheaper stuff (or the expensive stuff) and do 3/3 OCIs.

 

[brucelee]

Greaseball is simply defending the undefendable.