The fuel varies a lot I have noticed and even my 4.7l was very "sensitive" to different fuel, but I don't think that's what the tick is, cause first off, you're supposed to use 89 or higher in HEMIs and I don't know what people do, but the tick is there

 

You mean because of the tick? It is tempting, but running a 20 in this huge lump of a motor is kind of a scary thought to me

 

not because of the tick, but because the oil pump in hemi's were designed for 5w20. It should 5w20 on your oil cap.

 

Okay well, I had read that 5w20 was necessary for motors with MDS. For all the rest, that is, prior to 2006, it's 5w30. I might be wrong then...

My oil cap says nothing about what oil

 

My manual recommends 5-20 for the 4.7/3.7

 

I just dug out mine and, indeed, 5w30 or 10w30 for warmer climate zones

 

Huh. RAM fleet recommends 87.

Maybe they lied to get a 3500 sale. But you figure about 20 gallons per day average on 3500k vehicles (assuming not all fill up daily. Some twice in a day). That equals 70,000 gallons a day.

Say gas is $4 a gallon for 87. That's $280,000 a day in fuel. If you went with mid grade at 4.15 a gallon that's $290,500 a day. Difference of 10,500 a day.

Times that by 5 days then by say 45 weeks a year. You spend about an extra $2.3 million dollars a year to run 89 (mid) grade

Food for thought

 

That's interesting. Manual states 89 and 87 as acceptable
I would personally never use 87 in mine, unless there was no other way. What you said, though...makes sense with the numbers.

 

I will admit the tick is very very annoying.

But I don't pay the bill so I can't complain too much. I just think for a public image at least have a vehicle that doesn't sound like it's broken right off the delivery truck from the manufacture