I have two jugs of T5 just sitting around. Car is a 2011 Ford focus 2.0 and I was just wondering if you guys think it would be a bad idea to use the T5 as a motor flush. Would run the car for about three weeks and then do a complete oil change. Thoughts?
Rotella T5 as a “motor flush”?
- Thread starter ROLEXrifleman2
- Start date
Why use it as a flush? Why not just use it for an OCI?
Just my $0.02
Just my $0.02
Why not just bring it to the recycler? You'll save a lot of time since T5 won't flush anything anyways.
Don't bother, just run it for 5k+, these motors seem to be quite robust with no oil related issues that I know about.
Welcome to BITOG 
Just use it as regular oil for a regular OCI
Just use it as regular oil for a regular OCI
? What probably do you think you will be solving?
Thanks for the welcome and the responses guys.
The only reason I say to use it as a “flush” is it’s a “diesel” oil and I don’t know how long, if at all, I can run it with no ill effects. The car is about to turn 250k and I have no clue on the previous owner. Car runs great and gets 38mpg on the highway, so the truth is there’s no issue I’m trying to resolve other than making sure I take care of it the best I can. Being a “diesel” oil I’ve been under the impression it has lots of detergents in there and rather than dump a traditional motor flush in it I’d just use this. From the sounds of it though, it sounds like I can use it as regular oil and run it a full 3,000 to 5,000 miles.
For the life of me I can’t remember why I bought it only that it was about 7 years ago and dirt cheap. I bought 3 jugs of it.
Thanks again for all the responses so far and thanks in advance for any further info
The only reason I say to use it as a “flush” is it’s a “diesel” oil and I don’t know how long, if at all, I can run it with no ill effects. The car is about to turn 250k and I have no clue on the previous owner. Car runs great and gets 38mpg on the highway, so the truth is there’s no issue I’m trying to resolve other than making sure I take care of it the best I can. Being a “diesel” oil I’ve been under the impression it has lots of detergents in there and rather than dump a traditional motor flush in it I’d just use this. From the sounds of it though, it sounds like I can use it as regular oil and run it a full 3,000 to 5,000 miles.
For the life of me I can’t remember why I bought it only that it was about 7 years ago and dirt cheap. I bought 3 jugs of it.
Thanks again for all the responses so far and thanks in advance for any further info
Does your car burn oil?
If it does you may get an o2 sensor error after a regular duration oil change. (Ask me how I know)
Thankfully downstream o2 and it cleared after using normal oil
If it does you may get an o2 sensor error after a regular duration oil change. (Ask me how I know)
Thankfully downstream o2 and it cleared after using normal oil
You happened to discover the oil you should have been running all along.
I have read that high phosphorous above 800 might be a little detrimental to catalytic converters, T5 in 2018 clocked in at 1177 in the below post. There is an often cited government study from 1977 but its behind a paywall. There is also 469 results searching bob is the oil guy and high phosphorous, also linked below. Enjoy the rabbit hole and someone let me know the TLDR conclusion. For the record OP I think your engine will love T5 and be whisper quiet. 
Shell Rotella T-5 15W40 semi-synthetic VOA
Hello, I was unable to find a VOA on the Rotella T5 syn-blend 15w40 oil, so I sent a recently purchased sample for analysis and sharing. I hope to have another analysis of Rotella T-1 straight 30 weight in the next day or so.
bobistheoilguy.com
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