I changed oil about 2 weeks ago and put in Shell T5 10-30 and 16 oz of Archoil 9100. I bought the T5 10-30 only because it was on sale for $13.99 a gallon. I had put about 500 miles on it with local driving...no issues.

Got the call that grandma had died, 1100 miles away in Dayton, Ohio. I seriously thought about dumping the oil, not knowing if I should run it on a trip like that. We had 5 passengers, and a bunch of luggage. I also packed about 50 lbs of tools...just in case.

I had no issues...drove through the mountains on I-75, and got 17.6 -18.1 mpg loaded down. ECT ran 201-204 and EOT 210 -216 for 18 hours straight, stopping for fuel and 1 meal. <--- two trips like that.

So if you're considering using T5 10-30 , I just put it through a good stress test on a 6.0 ( I dont know if I would tow heavy using 10-30 oil)

 

Are you saying you wouldn't tow heavy with the t5 or the 9100. I am going to put 9100 in a change today and was wondering if you were allowed to tow with it in your oil.

 

Sorry, I fixed the sentence. Sleep deprivation kicked in....

Archoil 9100 is fine for towing, I'm not sure any 10-30 oil is though.

Someone who has done heavy towing with 10-30 would have to convince me it's ok to use.

 

Yeah I can't weigh in on that. I've always ran t6.

 

Have you done oil analysis in the past? It would be interesting to see your viscosity number after 5000 miles.

 

I think T 5 would be good to run as long as your not towing REAL heavy

 

No I haven't done any before, but that's a great idea.

I'll send in a virgin sample as well, so we can compare new T5 10-30 with my truck's T5 10-30 + Archoil 9100 sample.

 

The T5 is all I run, and have for the past 2 years. I even got it in the 10W40 flavor once. I add 16oz Archoil ever other oil change.

Admittedly I don't tow very heavy, normally around 5k to 7k lbs. and never over 10k lbs.

.

 

Sorry for the loss.

 

Guys,

if you haven't seen the following, it's good info on oil grade differences. It's not by any one manufacturer so it's not a sales pitch.......

It gives a good synopsis on "why" the move to lower viscosity oils for over the road trucks. The interesting part is that they talk a little about operating temperature vs oil viscosity. (the "big" number in oil ratings)

Oil Viscosity and Fuel Economy - Articles - Fuel Smarts - Articles - TruckingInfo.com

Regards,


Rick

 

I think I'm gonna switch to 100% Synthetic 10-30. Oil sample reports and 80+ pages of people running the t5 10-30 in the 6.0 since 2010 below....and people towing 10k + with T5 10-30.

6.0 oil analysis on Rotella T-5 10w-30. You will probably like this. - Ford Powerstroke Diesel Forum

We haven't had a good oil thread in a long time...

 

Sorry to hear Grandma passed away

My truck didn't like T5, don't know what it is but it doesn't like T6 either

Both my trucks prefer Mobil 1 5w40 or Mystic 15w40.

Glad to hear things went well and your got great mileage too! A win in any book

 

When you say your truck didn't like it, what did you notice in when you were running t6 and when you switched?

 

The closer I got to 5K on both, I noticed the power falling off. Throttle response and mileage progressively got worse. I decided to try Mobil 1 5w40 and my truck seems to like it as it's more consistent throughout the interval.

Both my trucks have always been this way:

-Neither one likes Motorcraft, anything Shell Rotella, or Valvoline.

-The 7.3 prefers Chevron Delo, Castrol Tection Extra, Mystic 15W40
-The 6.0 prefers Mobil 1 5W40 so far

 

It's funny you say that cause my truck is the same way with t6. When I get somewhat close to 4k or so. The truck sounds bad, sticktion starts and lacks power. Are you running the delvac 1 esp?