Pennzoil Ultra Platinum 5W30, 5742 mi, Tundra

[Astro14]

The Tundra requires that the oil change be done at 5,000 miles for a flex-fuel vehicle (mine is), with a 2,500 mile interval for severe service in a flex-fuel vehicle. I do run E85 fairly often (it's $1.79 here on base, and while my MPG declines, my cost per mile is cheaper on E85 than gasoline). I mentioned this to Blackstone, and it's the reason that I wanted a UOA. I had gone a bit over Toyota's required OCI, and I was running E85 often.

The truck also specifies a 0W20 (TGMO) and for the first two years that I owned it, Toyota changed the oil. Interestingly, our local dealer in VB used Valvoline 0W20, not the TGMO. For this change, the first that I had done, I got a great deal on the Pennzoil Ultra Platinum 5W30, so I ran that with a genuine Toyota filter. I've still got a couple of jugs of the 5W30 Ultra Platinum, so it won't be back on 0W20 for a while...

 

[demarpaint]

It looks like a good report, and the oil certainly could have gone longer. I'd stick with the oil.

 

[Astro14]

Thanks, I agree. Toyota cut the OCI quite short for flex fuel (it's ordinarily 10,000 miles on this engine) and I was wondering if perhaps the E85 would deplete the TBN faster. That doesn't appear to be the case...

 

[irv]

Great looking UOA using Pennzoil. Since the fuel doesn't seem to be a negative factor, I would also increase the OCI like Blackstone mentions. I would assume after your next one, if you choose to get one, Blackstone will recommend a 10,000 mile OCI.

 

[Patman]

Very nice! I'm hoping my Ultra Platinum UOA on my Civic looks this good next year.

 

[Old Mustang Guy]

Why would E85 require a shorter oci?

 

[Astro14]

Originally Posted by Old Mustang Guy
Why would E85 require a shorter oci?


I don't know. Its Toyota's requirement.

I was wondering if, perhaps, the combustion byproducts from E85, were more acidic, thus depleting the additives more quickly. Or, perhaps, perhaps more water is formed, having a similar result.

All I know for certain is that the owners manual stipulates half the OCI for the flex fuel Tundra over the regular fuel Tundra.

 

[irv]

Originally Posted by Astro14
Originally Posted by Old Mustang Guy
Why would E85 require a shorter oci?


I don't know. Its Toyota's requirement.

I was wondering if, perhaps, the combustion byproducts from E85, were more acidic, thus depleting the additives more quickly. Or, perhaps, perhaps more water is formed, having a similar result.

All I know for certain is that the owners manual stipulates half the OCI for the flex fuel Tundra over the regular fuel Tundra.


Interesting.

Thanks for sharing.

 

[dave1251]

I would go to 10K on Ultra 5W30 and not look back.

 

[MoparMan12]

I believe they shorten the OCI from the manufacture for the extra fuel burnt. For every how many miles you go with gas, running e85 would net you in burning 30% more fuel.
I wonder if they are worried about fuel dillution.

 

[irv]

Originally Posted by MoparMan12
I believe they shorten the OCI from the manufacture for the extra fuel burnt. For every how many miles you go with gas, running e85 would net you in burning 30% more fuel.
I wonder if they are worried about fuel dilution.


I would assume that that is their reasoning but I'd like to find out for sure and see the tests/R&D info that made them conclude that?

 

[bbhero]

Originally Posted by Astro14
Thanks, I agree. Toyota cut the OCI quite short for flex fuel (it's ordinarily 10,000 miles on this engine) and I was wondering if perhaps the E85 would deplete the TBN faster. That doesn't appear to be the case...



^^^^^^

I'd bet you are likely correct about this here.