Pushing PYB to 10000 miles.

[HTSS_TR]

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.

Your daily drive is clearly non-severe and very easy on oil and everything else. Any conventional will do 7,500 miles, Pennzoil Conventional is one of the better conventional oils on the shelf, it will do more than 7,500 miles.

 

[Dallas69]

If something does go wrong,at this stage of its life,you wont know if it was oil related or not.
So not much learned but its your car so have at it
If you did this in a good car you might learn something

 

[Errtt]

I'd no problem on Pennzoil conventional for 7.5k OCIs. Pass that, I'd UOA for ensuring its doing okay for 10k OCIs.

 

[SlipperyPete]

For less than $1 per 1K miles, I would use an oil intended and guaranteed to go 10K miles.

 

[daves87rs]

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.



Yeah, pretty much this...

Chances are this is his beater, and I doubt he is sweating too much about it....

 

[threeputtpar]

Smokescreen, I get what you're saying but I don't feel that a blanket statement that all conventional oils these days can make it to 7500 or 10,000 mile intervals in all situations.

Just look at the mega-thread for the 09 Pilot that followed the OLM intervals on Mobil Super 5000 from his dealer for mostly highway driving to see what can happen in some cases.

Maybe his 4runner has the 3.0 V6 is it that was known for sludge? I don't know and don't recall if that info was given.

 

[Smokescreen]

"now 5000 mile intervals with conventional oils are in the rear view mirror for most naturally aspirated engines."

I never said it was universal, obviously that Honda had a design flaw, I am sure there are a couple of others and the DI engines would also be the exceptions....rather than the rule.