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Prove My Point #5407490 04/19/20 06:46 AM
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Gebo Offline OP
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I know many hate these thoughts, but many know they are right:

1. Usually you are better off with OEM parts

2. Usually a longer OCI will cause trouble "down the road."

Deep down, we know these truths but we just try our best to rationalize in our attempt to "save" money.
We argue and try to convince ourselves and each other why we believe an oil will last a year, an aftermarket
part is just as good as an OEM, greater particle filtration is always superior, a "one size fits all" antifreeze/fluid is better
because we used it for 1 year and saw nothing bad happen, etc.

Deep down, we all know what's best and don't really need to prove anything. We really know the truth, don't we?


'98 LEX LS400 310K
'02 4Runner 250K
'05 Lex LS430 90K
'07 Lex GX470 75K

Shell Gas and Truck 5w-30
Amsoil OE 10w-30
Toyota ATF's and Coolant
Amsoil Gear Oil and Grease
Re: Prove My Point [Re: Gebo] #5407499 04/19/20 07:04 AM
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Bottom_Feeder Offline
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You're sounding awfully preachy here. Not everyone's situation is the same. No everyone's vehicle is the same.

Re: Prove My Point [Re: Gebo] #5407502 04/19/20 07:10 AM
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Quattro Pete Offline
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Originally Posted by Gebo
2. Usually a longer OCI will cause trouble "down the road."

Not sure how you could prove it, one way or the other.

Also, define "longer." Longer than 3-months/3k miles?


2002 530i   2015 Q5 3.0T   2018 Charger SRT
Re: Prove My Point [Re: Gebo] #5407505 04/19/20 07:15 AM
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Astro14 Offline
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I think “longer” is too nebulous...

Some cars, for example, my MB, are designed with long drain intervals and specify a particular oil to match that OCI. 10,000 miles on Mobil 1 0W40, and the results of the UOA are excellent and the engine is spotless under the valve covers, so that “longer” OCI is working just fine...

But I completely agree that you can’t go wrong with OEM. I’ve had too many aftermarket parts disappoint...


32 Packard 15W40
01 Volvo V70 T5 0W30 AMSOIL SS
02 Volvo V70 T5 0W30 Edge
02 Volvo V70 XC 0W40 Edge
05 MB S600 0W40 M1
16 Tundra 1794 5W30 Pennzoil Ultra
Re: Prove My Point [Re: Gebo] #5407516 04/19/20 07:31 AM
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WobblyElvis Offline
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My opinion/experience is that the quality of parts varies greatly, OEM or not. Generally OEM is better but not necessarily and the quality of all parts is decreasing.

Hard to define longer OCI's but I change oil less often than most would attest to on the board, and I have never had an engine problem I thought was related to the OCI.

Re: Prove My Point [Re: Gebo] #5407531 04/19/20 07:47 AM
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brages Online Content
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Depends on what you mean by OEM

Re: Prove My Point [Re: Gebo] #5407532 04/19/20 07:47 AM
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Leo99 Offline
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How far down is down the road?

Will using a better oil and filter and shorter OCI make a difference eventually? Probably but when is that? 200k miles for 400k miles?


Without data you're just another person with an opinion. W. E. Deming


2004 Corolla 125,000 miles
2004 Rav4 399,852 miles (RIP)
2015 Camry 101,000 miles
2020 Rav4 6,000 miles
Re: Prove My Point [Re: Gebo] #5407534 04/19/20 07:49 AM
Joined: Sep 2003
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MaximaGuy Offline
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Originally Posted by Gebo
I know many hate these thoughts, but many know they are right:

1. Usually you are better off with OEM parts

2. Usually a longer OCI will cause trouble "down the road."

Deep down, we know these truths but we just try our best to rationalize in our attempt to "save" money.
We argue and try to convince ourselves and each other why we believe an oil will last a year, an aftermarket
part is just as good as an OEM, greater particle filtration is always superior, a "one size fits all" antifreeze/fluid is better
because we used it for 1 year and saw nothing bad happen, etc.

Deep down, we all know what's best and don't really need to prove anything. We really know the truth, don't we?


OEM parts that come original is the best and OEM counter parts are definitely not the same production line.
Having said that if OEM original equipment parts last 120K, the OEM counter parts last 60K. So the original parts outlive OEM parts hands down.

OCI is a trickier and up for debate - although I stick to 10K synthetic OCI and reduce to 7.5K after 150K on the odometer.

Over years have realized monkeying in spark plugs, ATF and coolant departments is a foolish thing to do especially with newer vehicles that are designed as such!!


2018 MB GLE350
2011 Lexus ES350
2006 Toyota Highlander 4WD
Re: Prove My Point [Re: Gebo] #5407555 04/19/20 08:16 AM
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JeffKeryk Offline
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In my experience, quality parts are fine; OE (from the dealer) are fine as well and may be better in some cases.
An example is Toyota brake parts; in some cases, such as our GS 350 F Sport, even quality pads and rotors many times lead to squealing.
I have never seen or heard of another car doing this; any quality brake parts have fit properly and worked well.

We bought an Acura TSX new in late 2006; it now has just shy of 200K miles. I have serviced it regularly at 5K OCIs with mostly M1 5w30 and M1 or Wix filters.
The car is perfect; it does not burn a drop of oil. Insides are clean as a whistle.
I service 2 other 2007 TSXs, one with 90K and 1 with 120K.
The 90K car (sister bought new) was serviced regularly at quickie lubes (semi syn oils I believe) based on the minder. It burns a quart in 4K miles.
I am not as familiar with the other car's history (bought a year ago from MBZ dealer for a friend); I believe it had more dealer services. It is also not as good as our car with far more miles.

That's my experience.
Bottom line: use synthetic oils with a quality filter at 5K to 6K intervals. Your engine will reward you later on.

Last edited by JeffKeryk; 04/19/20 08:17 AM.

2018 Tesla Model 3, Medium Range Battery
2018 Lexus RX450h
2013 Lexus GS350 F Sport
2006 Acura TSX
2001 Tundra Access Cab, 1998 Accord LX, 1968 Corvette L36 Roadster, 1965 Olds 4-4-2
Re: Prove My Point [Re: Gebo] #5407557 04/19/20 08:18 AM
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JHZR2 Offline
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Generally agree with #1, though there are exceptions where OE parts have a flaw, or where it really doesn’t much matter, because performance and design is truly equivalent (filters come to mind, tires, some suspension parts, some brake parts, etc). Don’t really agree with #2, since there are so many considerations that go into it.

Re: Prove My Point [Re: Gebo] #5407580 04/19/20 08:35 AM
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Pablo Offline
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Originally Posted by Gebo
I know many hate these thoughts, but many know they are right:

1. Usually you are better off with OEM parts

2. Usually a longer OCI will cause trouble "down the road."

Deep down, we know these truths ............We really know the truth, don't we?


Usually? 51% of the time? 63.789% of the time? Nebulous statement is nebulous. 100% of the time I have replaced something on my 2019 truck, 100% I used something that is better than the OEM part.
Usually? There is that word again. Longer, properly extended change intervals CAUSE absolutely zero problems.

NOW on both. Prove it. YOU made the statements, not a theory you said TRUTH. Prove both statements.


DIRECT JOBBER - PABLO - for all your Amsoil needs
http://oilslubesandfilters.shopamsoil.com/


Re: Prove My Point [Re: Gebo] #5407585 04/19/20 08:40 AM
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Farnsworth Offline
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It probably has something to do with personalities. Some people don't like to be told what to do, and OE is telling you what to do. Using self decided aftermarket parts means you are the chooser, you are in charge. Extending drains to what you think best is the same. I don't think people who always think they know better have hidden beliefs or regret in their decisions. They are the ones who come out and hammer down anyone who disagrees with them.
Other people are more compliant in their opinions and accept expertise of the large companies to have done what is needed to recommend parts and maintenance.

Re: Prove My Point [Re: Gebo] #5407588 04/19/20 08:43 AM
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Snagglefoot Offline
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There are lots of cases where the OE part is simply too darn expensive which drives people to the other brands. In most cases, using recommended OCI’s will not cause problems for the original owner, especially if the vehicle is on a typical lease period.

Last edited by Snagglefoot; 04/19/20 08:46 AM.

If you want the job done right......do it yourself.
Re: Prove My Point [Re: Gebo] #5407592 04/19/20 08:53 AM
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ABN_CBT_ENGR Offline
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Originally Posted by Gebo
I know many hate these thoughts, but many know they are right:

1. Usually you are better off with OEM parts

2. Usually a longer OCI will cause trouble "down the road."



Respectfully, both of those are too broad and undefined with too many variables to address with any meaningful commentary. Could you maybe break them down a little bit?

Re: Prove My Point [Re: Gebo] #5407596 04/19/20 09:04 AM
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Cujet Offline
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It is getting harder to find quality aftermarket parts. The market is flooded with cheap copies of parts that are already failure prone. OEM's often improve parts over time.

Longer OCI's are absolutely not a good idea in some vehicles. GM, Hyundai/Kia, Ford, Honda, Toyota all have specific engines that are sensitive to oil quality, oil contamination, viscosity and dilution.

Last edited by Cujet; 04/19/20 09:04 AM.

People who count on their fingers should maintain a discreet silence.
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