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Manufacturers, Bypasses & Large Sumps #5265170 11/12/19 03:23 PM
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ad244 Offline OP
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Hey BITOGERS,

I had a quick question regarding the thought processes of major manufacturers in extending the recommended oil change intervals. -- Why don't major manufacturers just make the oil capacity larger and include some kind of multiple filter/ bypass/ magnets to extend oil change intervals? From what we see from the likes of Mobil 1, Amsoil etc... Oils should be able to handle 25,000 miles without much drama?

Does it all boil down to cost or am I missing something? Maybe an additive you add after 15,000 miles to "rejuvenate" the oils?

Re: Manufacturers, Bypasses & Large Sumps [Re: ad244] #5265172 11/12/19 03:27 PM
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rooflessVW Offline
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Consider the cost to increase your cars sump size and install bypass filtration, then mulitply it by hundred of thousands of units, all to decrease the traffic through your loyal franchises.

And then you have to convince Billy Bob that he can go 25,000 miles between changes for your "improvements" to mean anything. Otherwise it's just more cost and no one benefits.

Re: Manufacturers, Bypasses & Large Sumps [Re: ad244] #5265176 11/12/19 03:31 PM
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tcp71 Offline
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Initial cost and cost of ownership will both be higher than the competition and you'll lose customers. Never forget, 90+% of drivers don't have a sniff about oil, fluids or their vehicle in general. As long as it survives the warranty period, the manufacturer doesn't care.


2016 F150 Eco: Edge 0w40
2005 Sienna 3.3: NAPA 5w30 syn. (varies)
Re: Manufacturers, Bypasses & Large Sumps [Re: tcp71] #5265177 11/12/19 03:32 PM
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ad244 Offline OP
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Originally Posted by tcp71
Initial cost and cost of ownership will both be higher than the competition and you'll lose customers. Never forget, 90+% of drivers don't have a sniff about oil, fluids or their vehicle in general. As long as it survives the warranty period, the manufacturer doesn't care.


It seems to be good enough for Amsoil...?

Re: Manufacturers, Bypasses & Large Sumps [Re: ad244] #5265178 11/12/19 03:33 PM
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rooflessVW Offline
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Originally Posted by ad244
Originally Posted by tcp71
Initial cost and cost of ownership will both be higher than the competition and you'll lose customers. Never forget, 90+% of drivers don't have a sniff about oil, fluids or their vehicle in general. As long as it survives the warranty period, the manufacturer doesn't care.

It seems to be good enough for Amsoil...?

Amsoil is a drop in the bucket compared to the big boys.

Re: Manufacturers, Bypasses & Large Sumps [Re: rooflessVW] #5265183 11/12/19 03:37 PM
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ad244 Offline OP
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Originally Posted by rooflessVW
Originally Posted by ad244
Originally Posted by tcp71
Initial cost and cost of ownership will both be higher than the competition and you'll lose customers. Never forget, 90+% of drivers don't have a sniff about oil, fluids or their vehicle in general. As long as it survives the warranty period, the manufacturer doesn't care.

It seems to be good enough for Amsoil...?

Amsoil is a drop in the bucket compared to the big boys.


I dont really understand your response...? Drop in the bucket compared to what?

What I'm saying is that Amsoil is already saying their oil will do 25,000 miles with the factory filtration & small sump sizes we currently have. Couldn't we get multiple filters & larger sumps for most manufacturers to recommend 25,000-mile OCI or even further?

Re: Manufacturers, Bypasses & Large Sumps [Re: ad244] #5265209 11/12/19 04:06 PM
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Donald Offline
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They have done what you are asking with pickup truck diesel engines. Just add a bypass oil filter and you are good for a long OCI.

But for the original question its about cost and value add. If two cars cost the same and are similar in style, etc but one needs service every 10K miles and the other every 20K miles, then the 20K one has a value add. But if the one with 20K service interval costs an extra $1000 then maybe the extra cost does not cover the value add.

But the bean counters make the final decisions.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Manufacturers, Bypasses & Large Sumps [Re: ad244] #5265253 11/12/19 04:40 PM
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PimTac Offline
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The oil may be good for 25,000 mile oci but will the engine let it? You have to look at it from both sides.


2017 Mazda CX5
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Roki OEM filter.
Re: Manufacturers, Bypasses & Large Sumps [Re: ad244] #5265299 11/12/19 05:24 PM
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bullwinkle Offline
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Different driving styles (short trip, stop & go in the city, and all high speed highway) are going to dictate how far an OCI can go. Plus a mfr. has to gamble on how much oil gets consumed, does the vehicle owner bother to check levels (quick tip-most non-BITOG drivers could care less)? Too many factors at play to gamble potential huge warranty costs. Heck, we're having trouble getting Ford (& their dealers) to repair things under warranty already! If the drivetrain doesn't blow up, making the vehicle unusable, the dealers really don't seem to care.


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: Manufacturers, Bypasses & Large Sumps [Re: ad244] #5265339 11/12/19 06:16 PM
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BeerCan Offline
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Plus how many people would still change their oil when it still has half its life. Cheap insurance they will say . . .


2020 Porsche Cayenne
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2016 Ford F150 3.5 EB
2016 Porsche 981 GTS
2015 Ford Mustang 2.3 EB
My car list is getting long smile
1994 Porsche 968 Coupe
1987 Porsche 944 Turbo
Re: Manufacturers, Bypasses & Large Sumps [Re: ad244] #5265563 11/12/19 09:36 PM
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Mad_Hatter Offline
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Originally Posted by ad244
From what we see from the likes of Mobil 1, Amsoil etc... Oils should be able to handle 25,000 miles without much drama?

Not if it's severe service or still under warranty.

The day I see broad support amongst passenger vehicle OEM's in the form of owners manuals spec's, I'll consider 20k+ mile oci's. Until then, color me sceptical of the tail that's wagging the dog.😉



Last edited by Mad_Hatter; 11/12/19 09:40 PM.
Re: Manufacturers, Bypasses & Large Sumps [Re: ad244] #5265568 11/12/19 09:41 PM
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That would increase manufacturing costs, be ‘more harmful for the environment’, and increase the cost of ownership.

Re: Manufacturers, Bypasses & Large Sumps [Re: PowerSurge] #5265585 11/12/19 09:59 PM
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CR94 Offline
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Originally Posted by PowerSurge
That would increase manufacturing costs, be ‘more harmful for the environment’, and increase the cost of ownership.
... and add weight and fuel consumption, which they're trying to avoid.

It's strange how some people are calling ordinary or larger sump capacities small these days.


2011 Toyota Prius now at 107K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K
Re: Manufacturers, Bypasses & Large Sumps [Re: ad244] #5265640 11/12/19 11:41 PM
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dwendt44 Offline
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Many engines now have 6 or 7 qt oil pans.
On the other hand, GDI engines are hard on oil so it's trade off
in many respects.

My 2¢


There's no such thing as:
Too big of a battery,
Too large of a gas tank,
or too loud of a horn,
or too bright headlights.
Re: Manufacturers, Bypasses & Large Sumps [Re: BeerCan] #5265785 11/13/19 08:19 AM
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dave1251 Offline
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Originally Posted by BeerCan
Plus how many people would still change their oil when it still has half its life. Cheap insurance they will say . . .



That nonsense is said all the time.


make the inside of your engine oil cap white.
don't use.
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