Join Date: Apr 2014
Location: Palm Harbor, FL
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Blackstone oil comparison for Rotella T vs T6, and Amsoil (soon)
I've been involved in engine stuff, whether it be with bikes, cars, atvs, etc since I was a child. I'm sure that you know, one of the most intensely discussed topics is oil. Instead of going through theory of oil use and such, I'm testing them. I figured I'll run a few different oils through my truck using an 8k mile OCI, and compare them. This way, in 5-10 years when I get a newer diesel, I'll know which oil is the absolute best and can use that exclusively. My truck has almost 270k on it. It's entire life it has ran on standard Rotella T. Since I heard that they changed their formula, I put into motion my test, and switched to T6, planning on using that anyway. I'm an Amsoil dealer, and when I finished the OCI on T6, I switched to Amsoil Signature Diesel. Another 10 months or so and I'll be able to show data for that. In this chart, you will notice that the last time I had T in the engine, I had 3 qts I had to fill. I think that was a bit of an exaggeration, I think I only really used 2. That is also partially because I overfilled it slightly, and I think some of the oil burned off. But still, that's a quart more than with T6. Curious to see how Amsoil does, and if anyone has suggestions for the next oil to test out. Hope this helps some of you.
Another fun tip of this report, is that it shows me using longer OCIs for oil when using the old Rotella T formula. 4.5k to 6.5k, and finally to 8k. Absolutely no reason not to run 8k, and I would believe that's with any decent diesel motor oil. Happy holidays! I'm subscribed to this thread so I'll get notifications if there are any questions. Otherwise I'll post back up in 10 months or so when it's time for another fill.
'01 F350 7.3l SRW CC 4x4 Lariat