Seeking recommended OCI for SAE30 in daily driver.

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FlyNavyP3

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Good morning faithful BITOG'ers, I accidentally posted this in the UOA forum instead of here,

My stash contains a significant quantity of PYB/VWB SAE 30 oil. Some of it will get used in OPE and the break in on some new engines I've built but I'd be interested to see how it performed in a daily driver such as my 2004 Lexus ES330 or 1987 4Runner. What would be a reasonable OCI for this oil? I was thinking 5,000 in the Lexus that gets driven 110 miles round trip per day to work and gets used mostly short trips on non working days. Of course I'll do a UOA at the end of the run to evaluate the oils condition but looking for thoughts on how far the first run should be before a sample.
 
Run it for the manual recommended interval. It's going to be just as good as the similar quality multigrades.
 
Last edited:
Originally Posted By: maverickfhs
BTW, can straight SAE30 be used instead of 5W30 or 5W20? Thank you.


In what?
 
Originally Posted By: Rand
Originally Posted By: maverickfhs
BTW, can straight SAE30 be used instead of 5W30 or 5W20? Thank you.


In what?


Sorry, in a Honda Civic.
 
Originally Posted By: maverickfhs
Originally Posted By: Rand
Originally Posted By: maverickfhs
BTW, can straight SAE30 be used instead of 5W30 or 5W20? Thank you.


In what?


Sorry, in a Honda Civic.


I think that might be pushing it in VA for winter, I'd imagine summer would be fine.
 
Originally Posted By: Virtus_Probi
Originally Posted By: maverickfhs
Originally Posted By: Rand
Originally Posted By: maverickfhs
BTW, can straight SAE30 be used instead of 5W30 or 5W20? Thank you.


In what?


Sorry, in a Honda Civic.


I think that might be pushing it in VA for winter, I'd imagine summer would be fine.




Thanks, was just asking for knowledge and information sake.
 
You're in FL so morning temps will not be that bad. So you could run it straight, or you could run it as a blend with some PUP 5-30. That would allow the precious and hard to obtain PUP stash last much longer
laugh.gif
 
Jeppers! a quality SAE30 HD will be better than ANY 5w30, syn or otherwise. 7K ABSOLUTELY NO problem 110 Miles/day with API approval. Multigrade are compromised for high mileage high stress performance.
 
Originally Posted By: ARCOgraphite
Jeppers! a quality SAE30 HD will be better than ANY 5w30, syn or otherwise. 7K ABSOLUTELY NO problem 110 Miles/day with API approval. Multigrade are compromised for high mileage high stress performance.


OK, good to hear.

I also had a bunch of Rotella SAE 30 from when I had a Detroit 2-stroke diesel.

I've been mixing it 50/50 with Motorcraft Semi-Syn 5W-20 and running it in my 4.6 liter F150, but only in the summer.

I go 7,000-8,000 on this mix, which is (honestly) probably draining it too soon.
 
You already know the answer.
You'd run it as long as you would any other Grp II oil.
In FL, you could probably run it any time of the year.
With the long commute, you could likely go 7K on an OCI and there should be very little permanent shear to see in a UOA although you might see some thinning from virgin just as a consequence of fuel dilution.
 
Takes me back to the 60's when I was working the farm and excavating work with my dad. He was a solid straight 30w guy. Year round in Iowa. He usually put on well over 50K miles a year between farm and job site excavating stuff with his pickups. All of his vehicles went well beyond 150,000 miles. The 1966 Chevy pickup with a 283 went at least that long and my uncle took it over and rebuilt the engine while I was playing Army in a tropical location. He claimed that it was in pretty good shape for a engine that had seen some pretty harsh treatment on the farm. Not sure how long he ran the pickup after that. My dad picked up a 1974 Pontiac Catalina with a 400 engine new and same deal, it got straight 30w. I ended up taking it off his hands later since it was just sitting around in 1994 and took it to over 250,000 miles. Could have gone longer on the engine but the car died of body cancer.
 
There's about a bazillion trucks out there that ran/run straight weights for close to a million miles. Relegating it to the lawn mower means folks know little of the nature of SAE 30 HD oils ...

The ONLY reason multi's became popular was cold start in bad cold places. Cranking an engine with 30 in it below freezing is not fun.

I think about all the tractors I've known (Big CATs down to little JDs) that have lived their whole life on SAE 30 HD and been run on the governor for hours on end ... Not an oil related issue anywhere. Dirt control in the intake - yes, oil - no ...
 
Thanks for the feedback all! The Lexus will be due for an oil change mid April so no fear of cold weather that late in the year here in Northern Florida. Will plan to run PUBLIC SAE 30 for 5k and sample. My main concern is TBN retention as I'm not completely sure where the oil starts out I would assume somewhere in the mid 6 range. It will be fun to try out!
 
Originally Posted By: slacktide_bitog
The straight 30 may be ok to use if it's always over 40 degrees where you are. Otherwise, restrict it to the lawn mower.


what's the science for where 40 degrees come from ???
 
I have run straight 30 in a number of modern vehicles with great results, but you don't want to do it when it's cold. And right around 40 degrees or a bit below is when it starts to get noisy and cranky at start up though, would not recommend it for temps below 40.
 
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