Got this from a rep at Joe Gibbs Racing.. I will be running it!

We have a new oil coming out in January for the Hemi engines. It is called DT40. It meets the viscosity requirements of the Hemi engine - 5W-40. It also has a higher zinc content for greater engine protection under higher loads.

Thanks,
Lake Speed, Jr.
Certified Lubrication Specialist
Joe Gibbs Racing

 

The hemi in our trucks is supposed to use 5w20 not 5w40

 

Snake oil...! I`m NOT about to make joe gibb`s any richer either.
And 5w40 is fine as long as you dont have the MDS in your hemi.

 

Sounds like Shell Rotella T Synthetic, to me. A very good oil, in it's own right. I use it in motorcycles, lawnmowers, snowblowers, some cars, and some trucks if they find 40Wt acceptable. A true, heavy duty oil, long change capable, and a VERY GOOD oil. and the 5W makes it very good for cold weather starting, too.

Always best to stick to the mfrs recommendation - especially if it is critical for MDS.

 

+1 engine cap says 5w-20

 

haha...but yes 5w-20, the manual does state that if you use any other type it will cause the MDS to act improperly.

I don't use my MDS! DISABLED! But I am actually going to enable it again

 

Is this the same Joe Gibbs Racing that had 14 engine failures in NASCAR racing this year? I can't wait to put something they developed into my engine with a track record like that.

 

ROTFLMAO..... I AGREEEEEEEEEE...!!!!!!!!!!!!

 

Either the 5W-40 is a typo error,or Joe hasn't done his research!