Engine oil

I just sold my 1994 Pete which had a 3406E Cat. I always swore by Delo 15-40 BUT I noticed that few years back they changed there formula, I noticed by the increase in blow-by. So I did some research and talked to a local oil distributor only to confirm what I learned. So with that being said, I switched over to Phillips/Conoco synthetic blend brand, and the blow by decreased. After using it couple of oil changes, my local oil distributor recommended a house blend which was almost 1/2 priced and exceeded Phillips/Conoco brand. So, my recommendation would be either to stock up on your mystik and when your getting close to a service, carry the oil with you since you let shops change it for you. I’m just throwing out there on the type of oil that worked for my dinosaur engine. New oils “sometimes” don’t mix well with new formulas.

 

It's hot in South Texas, and I like to do what's best for my engine. That's why I run 80/90wt. I can tell it's working, because the oil pressure gauge stays maxed out all the time.

On a more serious note, oil has come a long long ways since the sixties. All base oils are basically the same, and the only difference in brands is the additive package. But even "trash-tier" oil is still good oil. Make sure it's compliant to your engine (CJ-4, CI-4, etc), and it really doesn't matter. Dino oil can even be labelled as a synthetic as long as it meets certain standards, even though it doesn't have an ester oil base. So just because it says "synthetic" on the bottle, doesn't mean it's synthetic.

While changing my oil, I like to drink an ice cold Dr. Pepper. In fact, I'm drinking one right now, and it's very refreshing. Dr. Pepper - One Taste & You Get It.

 

Mystik is available at. Fleet Farm stores.
I like their products

 

Have you thought about buying it in bulk? Looks like it's possible local Graingers will even have it in stock.

https://www.grainger.com/product/MYSTIK-Synthetic-Blend-Diesel-Engine-400F54

And you can even get it at Amazon, for almost five times as much!! But get a load of that low shipping price of $7.95. Now you can't beat that with a stick.

https://www.amazon.com/Mystik-663003002001-Motor-Amber-15W-40/dp/B088KCH8RS

 

Thanks GpD. Nearly spit my coffee out...

 

Rotella has always worked for me. Back when I was still running my little Frieghtliner I ran Rotella and when ever I took it into Holt Cat to get an overhead run or that evil Huei fuel system (the old 3126’s used) serviced they would change the oil into their Cat brand. I think it is made by Delo but can’t remember if that is what they told me for sure.
Anyway, that engine would eat it up and in no time it would be a gallon low. Next oil change I’d go back into Rotella and the consumption would stop.
Some engines are funny that way.

 

I never ran anything but rotella in my cats. Just seemed to be what they liked.

 

Wal Mart supertech is the cheapest oil you can buy. Ran it for years in my C15 and the samples all come back good. Running it now in my Detroit. Don't see the point in paying extra money on motor oil for the advertising and racing sponsorships of Mobil, Rotella, Valvoline, etc although I am glad people do because I am a race fan lol.

 

Any particular reason a mega would switch from using Rotella 15w 40 to 10w 30? Only ask because my used truck service records show they did that about 18 months ago and kept it at 10w30.

 

I get mine from Tractor Supply for about $45 for a 5 gallon pail.

Traveller Premium All Fleet 15W-40 Diesel Engine Oil, 5 gal. at Tractor Supply Co.