Interesting OCI

[loneryder]

Posted: 04/16/15 06:03pm Link | Quote | Print | Notify Moderator

In my 2000 Class A I had Amsoil and a bypass filter system installed at 6k. I had oil samples at each 7500 miles thereafter. The lab recommended oil change after I reached 35000. I switched to Mobil 1 5/20 at that time. I changed the bypass filter each 25k miles and the base filter with each 7500 mile sample. All change recommendations after that came at 35-45k miles on the oil. Lots of perfectly good oil being tossed. Note, that the results may have been different without a bypass filter.

At 127k miles the V-10 spit a plug. Had to have the heads pulled to fix. No measurable wear on cams or valve stems. Did have the valves polished. Compression was in the range of a new engine after reassembly.

In motor home use the V10 should easily run 300-500k. Probably outlast the servicability of the house part. Transmission is the weakest link in the drive train.

 

[4wheeldog]

On the other hand.......I could change the oil every 10k miles for less than it costs for all that testing. Another way to get good results. Just sayin'.

 

[A_Harman]

Which engine is this? Ford 6.8L or Dodge 8.0L?

 

[AKhan87]

Originally Posted By: 4wheeldog
On the other hand.......I could change the oil every 10k miles for less than it costs for all that testing. Another way to get good results. Just sayin'.

its people like these who help us have to confidence for those 10k OCI you talk about, are you telling me that without data like this, you were blindly doing 10k OCI before coming to BITOG? if so, that's risky without any data to back it up...

OP, Thanks for your input.

 

[Kuato]

Originally Posted By: 4wheeldog
On the other hand.......I could change the oil every 10k miles for less than it costs for all that testing. Another way to get good results. Just sayin'.


You're correct, at 10k never worry. BUT cost analysis:

At 30k he had had 4 UOAs performed, for an estimated cost of around $120. By that time you would have done 3 oil changes. With the big sump in those mobile homes (guessing 10 quarts with the bypass setup?) and a good $10 filter, using M1 at $27 for a 5 quart jug, that would be $64 per oil change or $192 for the same distance. As it was, he did one oil change and the UOAs for a total of $184, so he has already saved $8 due to the extended OCI and analysis.

So even if $8 over the first 35k miles isn't much, it's not bad pay for a hobby.

 

[mrsilv04]

Originally Posted By: A_Harman
Which engine is this? Ford 6.8L or Dodge 8.0L?


I'd think the "spit a plug" comment, and using 5w-20 would have answered that...

 

[4wheeldog]

Originally Posted By: 01_celica_gt
Originally Posted By: 4wheeldog
On the other hand.......I could change the oil every 10k miles for less than it costs for all that testing. Another way to get good results. Just sayin'.

its people like these who help us have to confidence for those 10k OCI you talk about, are you telling me that without data like this, you were blindly doing 10k OCI before coming to BITOG? if so, that's risky without any data to back it up...

OP, Thanks for your input.


I don't do 10k OCIs.....Oil is cheap. I don't exceed the manufacturer's recommendation.

I can see him doing it once, to get an idea of how far it could actually go, without the oil turning to junk. But once you know you can safely go 35k......Why wouldn't you just change it then, rather than spend money on continuous analysis?

 

[4wheeldog]

Originally Posted By: Kuato
Originally Posted By: 4wheeldog
On the other hand.......I could change the oil every 10k miles for less than it costs for all that testing. Another way to get good results. Just sayin'.


You're correct, at 10k never worry. BUT cost analysis:

At 30k he had had 4 UOAs performed, for an estimated cost of around $120. By that time you would have done 3 oil changes. With the big sump in those mobile homes (guessing 10 quarts with the bypass setup?) and a good $10 filter, using M1 at $27 for a 5 quart jug, that would be $64 per oil change or $192 for the same distance. As it was, he did one oil change and the UOAs for a total of $184, so he has already saved $8 due to the extended OCI and analysis.

So even if $8 over the first 35k miles isn't much, it's not bad pay for a hobby.

Except......He was changing the filters at 7500 miles anyway. There goes your "Savings"!

 

[tig1]

Originally Posted By: 01_celica_gt
Originally Posted By: 4wheeldog
On the other hand.......I could change the oil every 10k miles for less than it costs for all that testing. Another way to get good results. Just sayin'.

its people like these who help us have to confidence for those 10k OCI you talk about, are you telling me that without data like this, you were blindly doing 10k OCI before coming to BITOG? if so, that's risky without any data to back it up...

OP, Thanks for your input.


Blindly?? Wrong. I Have doing 10K OCIs since 1978 with M1 oils. This was many years before I even knew there was UOAs.

 

[loneryder]

Originally Posted By: A_Harman
Which engine is this? Ford 6.8L or Dodge 8.0L?

Ford v-10

 

[loneryder]

Ford V-10 is a 6 qt sump. I don't know how much a by pass filter would add.

 

[Kuato]

Originally Posted By: 4wheeldog
Originally Posted By: Kuato
Originally Posted By: 4wheeldog
On the other hand.......I could change the oil every 10k miles for less than it costs for all that testing. Another way to get good results. Just sayin'.


You're correct, at 10k never worry. BUT cost analysis:

At 30k he had had 4 UOAs performed, for an estimated cost of around $120. By that time you would have done 3 oil changes. With the big sump in those mobile homes (guessing 10 quarts with the bypass setup?) and a good $10 filter, using M1 at $27 for a 5 quart jug, that would be $64 per oil change or $192 for the same distance. As it was, he did one oil change and the UOAs for a total of $184, so he has already saved $8 due to the extended OCI and analysis.

So even if $8 over the first 35k miles isn't much, it's not bad pay for a hobby.

Except......He was changing the filters at 7500 miles anyway. There goes your "Savings"!


Poop, I missed the 7500 filter change. And as mentioned since it is a 6 quart sump, maybe add one for the bypass, it IS more expensive - over the 35k. But then he scaled it back, IIRC, to 25k and will not need another UOA for the oil's condition. Initial cost IS higher, but in the long run it should save.

 

[A_Harman]

Originally Posted By: mrsilv04
Originally Posted By: A_Harman
Which engine is this? Ford 6.8L or Dodge 8.0L?


I'd think the "spit a plug" comment, and using 5w-20 would have answered that...


I was thinking Ford when I saw the "spit a plug" comment, but couldn't remember if Ford built 3-valve V-10's.