Dodge MDS lube/operation

[rootlocus]

Dodge 08 Ram 1500 5.7 hemi: Since MDS lube is kind of fussy, how does one tell when the MDS is operating so we can evaluate different lubes? Apparently Dodge did not include any annunciator for this. How is one to tell for the sake of fuel consumption? One web site gives details on a dashboard LED connected to a computer wire, but this is messy. I suspect it connects to one of the solenoids at 12v. Don't like to get into computer wires even if an LED draws only a few miliamps. I'm BSEE and this vehicle and its service manual is far too complicated in the electronics design and documentation. Oh for a Porsche 356 where the wiring diagram will almost fit on the palm of your hand.

 

[racer12306]

I've always heard, only use 5w20. Any other viscosity will throw the MDS off.

 

[SteveSRT8]

Don't buy the hype. The fact is the mds system is extremely tolerant of almost any grade of oil.

 

[Jarlaxle]

Having seen several LX cars wind up 200,000+ miles on regular 5W-20, I say: use the 5W-20 and forget it.