Oil Change increments?? To the Techs & Oldies

[BryanH]

I am running Rotella 15/40 ( Not Synthetic ). I usually change oil/filters every 6k and eyeball the cleanliness of the oil weekly. I am thinking of pushing to 8k increments for monetary purposes. My question is..........
Has anyone with standard oil and mostly city environments done a true consistent oil analyses over 6K and what kind of results were you seeing?
I would really like to go 8-10K this maybe achievable with synthetic
I know there are quit a few guy's here getting their oil analysed, And wanted to here from y'all.
I completely understand clean oil is deathly important to a 6.0L..

On a side note- I can not seem to find ANY negative aspects to synthetic oil. Does anyone here know of any? Besides cost.

Thanks in advance fella's

[HeavyAssault]

My research has found using synthetic oil with a bypass filter kit can help you get to
10K oil change intervals. The key is the oil analysis as a religion. Stay consistant with the routine and you will find your OCI.
The 6.0L is pretty tough on any weight or brand of oil since it will shear down to 30W in no time. For the cost, it isn't cheap so make a wise decision at $20 a gallon it adds up quick.

[BryanH]

Great input, Thanks

[Dirk]

I would not for one reason. Oil Shearing. The oil can look fine to the naked eye, but that doesn't mean the oil has begun breaking down to a point that it won't protect your engine.

If you decide to move to Syn oil, contact White Buffalo.

[BryanH]

Originally Posted by Dirk

I would not for one reason. Oil Shearing. The oil can look fine to the naked eye, but that doesn't mean the oil has begun breaking down to a point that it won't protect your engine.

If you decide to move to Syn oil, contact White Buffalo.

That was always in the back of my head. If you had to take an educated guess, Normal driving (Highway/Pulling 3-8k 4-5 times a week) How many miles into a fresh oil change would you say "Standard oil" Breaks starts breaking down? And at what rate?

After 2k miles you have 80% oil life? 50%? 100%.

I know this is a very tough almost impossible question to answer. But give me an idea if you could?

And would you say Synthetic oil is twice as good because of lubrication or longevity?

I purchase oil at Auto Zone, Rotella 15/40. But I was at Walmart this evening buying a B-day card, And saw ^^^^^^ for 11.74/gal. And synthetic 22.74/gal. Twice the cost? Hence the question.

[bigcountrysg]

I change my oil every 5,000 miles. I use regular 15w40 rotella. I use a fram oil filter. Every other oil change I change the fuel filter.

[Dirk]

I stick with standard rotella in my diesel. Changed every 4k. No issues. One thing to remember, the blue bottle rotella is not a TRUE syn oil.

[Dirk]

And to answer your question... there isn't an answer. Every truck is different how it uses the oil. With normal driving like you listed above, every 4k should be fine.

[mschn99]

u can change your oil at whatever interval you want.....

do you want a 100k truck??

a 200k truck??

Its your call.... the save bet is every 4k.....some push it further..

its your call.....and it all depends on how much you want to gamble with it..

[Dirk]

Originally Posted by mschn99

u can change your oil at whatever interval you want.....

do you want a 100k truck??

a 200k truck??

Its your call.... the save bet is every 4k.....some push it further..

its your call.....and it all depends on how much you want to gamble with it..

For someone that has been banished, you sure are around a lot lately!