Pushing PYB to 10000 miles.

[tig1]

Originally Posted By: gfh77665
What do you all think about Pennzoil conventional at repetitive 7500 mile intervals???


I wouldn't run any dino past 5K. If you are wanting to go to 10K then use PP or M1. There's no risk doing that. Both of my engines are like new clean with 10K OCIs.

 

[SilverC6]

Originally Posted By: gfh77665
What do you all think about Pennzoil conventional at repetitive 7500 mile intervals???


Why go there?

Just use a synthetic EP motor oil and be done with it.

 

[DragRace]

Originally Posted By: tig1
Originally Posted By: gfh77665
What do you all think about Pennzoil conventional at repetitive 7500 mile intervals???


I wouldn't run any dino past 5K. If you are wanting to go to 10K then use PP or M1. There's no risk doing that. Both of my engines are like new clean with 10K OCIs.

 

[fdcg27]

I don't think that anything catastrophic will happen.
Plenty of folks push lesser oils to 10K all the time on unintended extended drains.
Outside of BITOG and the many other motorhead forums, many people consider an oil change some sort of a treat for their cars.
A little varnish?
Maybe, but there probably already is a little.
I'd love to see you do this just to prove all of those who think you need a synthetic for a 10K run wrong, as well as those who think that anything beyond 5-6K will cause engine destruction.
A little common sense goes a long way and you seem to have some.
It's not as though the yard to which this Toy is eventually bound will give you more for it because the engine is really clean under the valve cover.
The engine will outlive the truck without regard to the oil you use in it or the 10K drains you plan on.

 

[dblshock]

Originally Posted By: gfh77665
What do you all think about Pennzoil conventional at repetitive 7500 mile intervals???


I've run API 5/20 at that OCI/ 15k filters for 190k in my 2.4 Honda..save a lot of time and money steady diet of free and next to free oil! ..power train and body still very good.

 

[EA82]

I got 99 ways to save money but running 15K OCI's isn't one of them.

 

[dblshock]

that's the FCI..as recommended by Honda.

 

[Garak]

Originally Posted By: tig1
I wouldn't run any dino past 5K.

It should be able to be done, but with caution, including used oil analysis. The taxi fleet had 6,000 mile OCIs many years ago on conventional. Oil has gotten better. Of course, taxi service isn't as "severe" as some would have us believe.

So, there are valid reasons to want to run a conventional out to longer OCIs. And, some of those reasons are financial. I calculated once that had the cabs run the severe service 3,000 mile intervals over the taxi lifespan versus the 6,000 mile intervals, I would have spent enough extra money on oil alone to buy a crate engine at the time for each vehicle.

For a personal vehicle that doesn't do a lot of miles and may be replaced in a relatively short period of time, it's probably just an educational exercise. In fleet usage, it adds up to real money.

 

[gfh77665]

Originally Posted By: SilverC6
Originally Posted By: gfh77665
What do you all think about Pennzoil conventional at repetitive 7500 mile intervals???


Why go there?

Just use a synthetic EP motor oil and be done with it.


Got almost free Pennzoil conventional stash.
Drive 99% highway, 80 mile round trip every day
Older design engine 4.3L Chevy V6 in '97 pickup (like the old 350 less 2 cylinders)
Owners manual say 7500 "non severe" schedule.

Maybe I am wrong, but I think a 7500 mile Pennzoil conventional interval makes sense in my circumstance.

 

[demarpaint]

Originally Posted By: gfh77665


Got almost free Pennzoil conventional stash.
Drive 99% highway, 80 mile round trip every day
Older design engine 4.3L Chevy V6 in '97 pickup (like the old 350 less 2 cylinders)
Owners manual say 7500 "non severe" schedule.

Maybe I am wrong, but I think a 7500 mile Pennzoil conventional interval makes sense in my circumstance.


Try it. Pull a sample at 5,000 or 6,000 miles get a used oil analysis to confirm 7,500 miles is a safe interval. From what you've written it should be OK, and used oil analysis will take all the guess work out.

 

[T-Stick]

Go for it ... It seems as though some here can't diffentiate between one extended OCI to test the oil and running a lifetime of 10k OCIs.

One 10k OCI interval will have neglible detrimental effects. Based on this result you can decide on where to go from there. It will give you an idea of how much of a safety margin may have at a 5k or 7.5k interval. I have done this before with oil ... run one long interval to determine how much safety margin I have at the regular interval I plan to use. You can always run a 5k OCI next with a synthetic oil to clean things up.

 

[Dallas69]

I guess you could also run 10 lbs of air in your tires and see how long you could go without issues

 

[Smokescreen]

Some of these negative comments are comical...useless...but comical.


I look in my owners manual for my 1997 Suburban and they are recommending "crazy" intervals of 7500miles (12,500km) the 2005 LeSabre's "ludicrous" OLM with intervals going even beyond that are all calibrated for conventional oil.

In the consumer market, you would have those that actually follow the owners manual and OLM's recommendations and then those that regarded them as mere suggestions and went even further. There are some that change the oil sooner of course. Yet there are millions of engines in just both of these cars lasting for multiple hundreds of thousands of trouble free miles all over North America in some pretty unfriendly operational environments.

Fast forward 10 almost 20 years and oil has made some serious leaps and bounds in what it can do, both conventional and synthetic and there are some that still can't wrap their minds around the reality that the days of 3000, now 5000 mile intervals with conventional oils are in the rear view mirror for most naturally aspirated engines.

zamadison....run the interval, take a sample at the point at which you would normally change it out, see where you are sitting. Some of you need to take a chill, sit back, have some popcorn open up a soda pop and watch the proceedings. Geez its not like you have any vested interest in the results.

 

[Clevy]

Originally Posted By: Dallas69
I guess you could also run 10 lbs of air in your tires and see how long you could go without issues


How does that have anything to do with the question posed.
In fact I seriously doubt any harm will come about from running 10000 mile intervals on Pennzoil Conventional in a common NA motor,port injected.

 

[SwampSurvivor]

Originally Posted By: zamadison
Let me guess Merkava. You recommend Ultra 40w70 at a 1000 mile oci?


Darnit! Someone beat me to posting that haha!

I know of many people that run 10K mile OCIs on quicklube oil. Their cars all seem to easily make 100K miles.

 

[SwampSurvivor]

Originally Posted By: Dallas69
I guess you could also run 10 lbs of air in your tires and see how long you could go without issues


I can do that in my Jeep with no problems

 

[Merkava_4]

Originally Posted By: Miller88
I know of many people that run 10K mile OCIs on quicklube oil. Their cars all seem to easily make 100K miles.


Yeah, but what does their engine look like on the inside at the end of 100K miles?

 

[Dallas69]

He asks for opinions and that is what he gets
In a clean engine and mostly hiway miles I think you might get by doing this
I am sure lots of cars are with whatever oil the fast lube places put in
Myself,I would not

 

[dave1251]

Originally Posted By: Smokescreen
Some of these negative comments are comical...useless...but comical.


I look in my owners manual for my 1997 Suburban and they are recommending "crazy" intervals of 7500miles (12,500km) the 2005 LeSabre's "ludicrous" OLM with intervals going even beyond that are all calibrated for conventional oil.

In the consumer market, you would have those that actually follow the owners manual and OLM's recommendations and then those that regarded them as mere suggestions and went even further. There are some that change the oil sooner of course. Yet there are millions of engines in just both of these cars lasting for multiple hundreds of thousands of trouble free miles all over North America in some pretty unfriendly operational environments.

Fast forward 10 almost 20 years and oil has made some serious leaps and bounds in what it can do, both conventional and synthetic and there are some that still can't wrap their minds around the reality that the days of 3000, now 5000 mile intervals with conventional oils are in the rear view mirror for most naturally aspirated engines.

zamadison....run the interval, take a sample at the point at which you would normally change it out, see where you are sitting. Some of you need to take a chill, sit back, have some popcorn open up a soda pop and watch the proceedings. Geez its not like you have any vested interest in the results.


You should look at the owners manual for a 1956 Chrysler 300. The recommend OCI after a 1,000 mile break in period was 5,000 miles.

 

[Kuato]

Originally Posted By: zamadison
The goal is not to save money, or drive the car for another 200,000 miles. The goal is to see if Pennzoil Conventional SN 5w20 can be pushed to 10k in this car without catastrophic results. I asked the question in an older post and half this board said you'd never know without trying it an then doing a used oil analysis. So I decided to do it an then the other half of the forum starts telling me I'm an idiot. This reminds me of why I stopped visiting this forum about 5 years ago. It's a collection of schizophrenics.


Amen. It's 14 years old and may be towards the end of its life, and you are volunteering to do an experiment and show everyone the results. I wish people would see that.