From what I remember,any Ram built in the fall of 2008 did'nt come with the fuel saver feature.My light comes on when I'm going 30-45 MPH on level or slight upgrade or downgrade.It comes on again when I'm going between 65-68 MPH, never 70 MPH.Keep in mind, when you use cruise control, that'll affect slightly when the MDS kicks in, I guess the system wants to go a certain MPH and it goes there not in a delicate manner.If you ease on the gas, you can keep the MDS on in some cases and get yourself to the desired MPH at the same time.

 

Now if you put 300K there might be a clause in the warranty that says normal wear and tear is not covered. But what is normal? My dad had a topaz that he drove daily 8 hours, 5 days a week and then some. He got a lifetime warranty from Ford, they replaced almost every part on the car including tierod ends ever few months, complete a/c system, engine three times, trans a couple times. It was some weird warranty that they got rid of very soon after it was available. It was the best money he ever spent. They kept saying he was using the car for work which was true we haul a couple envelopes important stuff when AM C was around then not long after Chrysler took over anyway dealership tried to get him on that but there was nothing worn that would indicate work. He told them he had a girlfriend in Toronto and she was a nymph. What can they say? LOL They were happy when he finally sold that car..non transferable warranty.


So in short find out what their idea of mileage limit for usual wear and tear and see if they cover it beyond.

 

Along with 5 year inspection by dealer and using only 5w20 oil of your choice. The manual says you need to change the oil every 6000 miles or 6 months. Whichever comes first. So I wouldn't buy super expensive long mileage oil when you are supposed to change it every 6 months regardless of mileage.