OK guys and gals, it that time to get big poppa ready for the cold weather and a good synthetic is what I want. My wife picked up some Rotella T5 10-w30 synth blend. They do carry a 15-w40 in the same synthetic blend but she said she didn't see it, only the 10-30. Personally I want the 15-40 synthetic because of shearing issues I had before, thats another thread what do you all think. Could I put in the 10-w30 and add some dello blue15-40 sraight oil to keep things in balance, viscosity reasons..open for some suggestions. Thanks. Info 2006 and older diesel engines
API CJ-4, API CI-4 PLUS
Shell Rotella® T6 Full Synthetic 5W-40
Shell Rotella® T5 Synthetic Blend Technology 10W-40, 10W-30
Shell Rotella® T Triple Protection® 15W-40
and trying to disect this. My main question, should I run this 10w-40 syn-blend rotella and if not, can I put 12 quarts of the Rotella 10w-30 and add the Chevron Dello, its a 15-w40 non synthethic. I'm thinking this will get me were I want to be with regards to viscosity, sound good folks??

 

Where did she buy it at? If it was walmart I would return it and get the 15w40. No point in chanceing it with the 10w30.

 

I would go with the 15-40. I'm not big on mixing oil.

 

I just changed my oil to Rotella 15w40. Id Return what she got and just do it right to begin with. I go to tractor supply and pick up a 5 gallon bucket of Rotella 15w40 for $50-55.

Thats pretty cheap. Don't forget Oil is the most important longevity supplement our trucks have. I wouldn't skimp and play around now. Because you will pay for it later.

 

$50 for non synthetic right??

That's a pretty good price for Dino oil

 

Yea, I'm a stickler for oil changes plus putting only the best Lifes Blood in my truck. Its going back, I'm not chancing it. A while back I had a UOA done with Rotella 5w-40 full synthetic and ran a 10,000 mile interval. My test came back from Schaeffers test lab, my 40 weight oil went down to a 30 weight, it sheared the heck out of it and I decided to either lower my intervals to 8,000 with the 5-40 full syn or go with a 15-40 blend syn. The blend 15-40 was my choice because of the shearing. Thanks guys, its going back.

 

Good decision Mike

 

I guess its Dino oil? All i know is my buddy who owns a diesel shop when i took him my truck when i first got it he said only run Rotella 15w40. So i have done so ever since. Not quite sure what it really is, never looked or asked.

 

Shearing? Can someone give me a quick explanation of shearing?

I did my first oil change about 3500 miles ago (with 5000miles on the Od from when I bought it) with Rotella 15W-40 from Wally World........I'm thinking a lighter oil would be better in New England winters....so I'm interested in these recommendations as well.

Thanks

Steve

 

I cannot answer the shearing question but your engine will like the 5w-40 synthetic in the winter. Better startups and no romping at startup.

 

Its when you take sheep and you....

Oh, never mind.

 

About the shearing question - The way some oil companies increase their oil viscosity is by adding a thickener containing large molecules. It is the large molecules that make the oil thicker thus the higher viscosity index. The trouble with this approach is that the large molecules are somewhat fragile and can be broken down or "sheared". When this happens the oil becomes thinner and the viscosity drops.
Hope this helps.

 

Outstanding, thanks for the explanation.

As for the sheep..........here in New England they "handle" their sheep a little funny sometimes..........nttawwt

 

big poppa

I'm running the Rotella 5-40 full syn.

did you indicate you had sheering with this oil.

I am changing at 7,000 to 8,000.
I great for the Chicago winters.
I've been running it now for over a year.
If I keep the intervals were I'm at, I might be ok?

 

You can't go wrong using the 15-40 Brent, your buddy is correct but if you live in very cold climates the 5-40 synthetic has a lower pour point I believe how its worded.

In about 50 words or less and in a nut shell Steve, I was running 10,000 mile oil change intervals with the Rotella 5w-40 then Schaeffers 9000 5w-40. I did a UOA (used oil analysis) and found because of the extended oil changes my oil sheared. Having said that a oil guru here and great fella WhiteBuffalo Rich and the labs told me to cut back to 8,000 mile intervals on the synthetic or go to the Schaeffers 7000 15-40 synthetic blend. Anyways, long story short, I run 8,000 mile intervals on the synthetic when I put it in there.

Thanks Jay and your right.

Funny stuff and welcome to FTE..

Very good explaination, thank you..and also welcome to FTE.

As to my responses to the above post, yes, your cool but what everybody should do at least once or every so often is get a UOA done, either by Blackstone or Schaeffers. Blackstone is a supporter here plus you'll know exactly whats going on inside your motor as far as wear is concerned. I learned all this stuff here. I like the 15-40 Schaeefers blend but I think I'm just going with the Rotella 5w-40 synthetic this winter, 8,000 mile interval, the Schaeffers I have to order and it takes awhile and my oil is at its limit now.