So I changed my own oil about 5000 miles ago with this

I was in Wally world the other day thinking about getting the same thing and I saw this . Does anyone use this? Its a few bucks cheaper than the T6 (which I assume is the same this as the picture above) at $16/ Gallon. Will it be okay to go from the true synthetic to the synthetic blend? Also, how many miles should I go between changes with this stuff?

Thanks in advance,
rhodester

 

i think you can go 7000 miles on the synthetic, dont know about the t5. if you change over change the filter and you should be good.

 

Fords OEM is a syn. blend. Recemended replacment is 5k. Just get a decent filter.

 

You might want to consider doing an oil analysis to get good firm numbers on your oil's performance in your engine, as well as a feel for the engine's health.
Check out Blackstone Labs: Blackstone Labs
I have already extended my oil's life to 7500 between changes, and am working on those steps that will allow even more.

 

The T5 oil is the exact same Shell Rotella 15w40 but is marketed under a new label. There are some questions as to whether or not Shell may have decreased their moly content in their additive package with the new label, but the word I have is that it's the exact same oil as the pre-T5 labels. The T6 is the same as the Rotella-T synthetic 5w40. Again, supposedly no changes in formulations, just a new marketing approach.

As for OCI's, I'm using an oil bypass setup and have been getting nearly 18K miles between changes with my fully synthetic 5w40 (not Rotella) and am going to try to push 20K if my UOA's show me that I can.

 

Does that T5 picture say 10w-30? I think I'd stick to a 40 weight if it were me.

 

The new 6.7L specs 10w-30 motor oil. I don't know about the 2010 compliant Cummins or Duramax, but maybe this is a label change for the newer engines?

 

Thanks. I hadn't heard that, but I bet that's why it's hitting the shelves. I wonder if the quickie change places will stock both the old and new stuff or just take the one size fits all approach?

 

On the shell site it shows you can get the syn. blend in 10w30 or 10w40. I only saw the 10/30 at wally world. Here is the link to the shell site: - Shell Rotella T5 Synthetic Blend Technology

 

A lot of the newer engines are being specified for the lighter 10w30, 5w30, 5w20, and even 0wXX weight oils as an effort to drift towards better fuel economy. These lower weight oils are also being specified partially due to tighter clearances in the newer engine components, but this is really being driven by the push to higher fuel economies.

However, especially as related to our world of hard-hitting diesels, there is a tremendous and growing concern among lubrication engineers and specialists that these lighter weight oils, even though they will help increase fuel economy, they also just may not be capable of maintaining an adequate lubrication film barrier or even be able to adequately stand up to the high shear forces in working diesel engines. What this also potentially may develop into will be SHORTER OCI's and MORE oil being sold by the large oil companies, but that won't happen until/unless there becomes a rash of premature wear patterns due to the inability of these lighter weight oils to maintain proper lubrication films when put onder working loads.

Below is a quote from an oil manufacturer insider regarding the trends towards lighter weight oils, and even though the particular quote is targeted towards a 5w20 and 0wXX weight range of oils, the same principles apply when considering reducing oil weight in an engine with internal component clearances built around a 5w40 and 15w40 oil weight (like our 7.3's).

"In addition there have been discussions in the SAE Fuels and Lubricant Committee and even discusssion in the ASTM's PCMO Subcommittee B, which includes lube, additive and OEM representative that the SAE viscosity classification may have to be revised in order to provide the proper film thickness protection, high temperature wear protection that will be needed for 2010 and beyond vehicles. There is questions being raised throughout the industry that the 5W-20 and 0W-XX may not provide the protection that is needed even though they provide fuel econmy benefits. All of this has been documented in articles that have been appearing in Lube's & Greases over the past few months."