Hey guys,

My MPG has dropped by around 4 MPG here in the last few weeks. My driving has not changed at all. Just coming and going from work and the normal running around. I always get my gas at the same station and always have.

Any idea`s as to what could cause this sudden drop? It is really sucking.

 

Have you every changed your plugs? My buddy just change his plugs in his 05(cant remember what kind, champion copper maybe??) and his mpg jumped up 3 or 4 mpgs. Just something to look into if you havent already. Good luck

 

Thanks! I was thinking that as well. I am going to get plugs tomorrow and get them changed. I don`t know what else to try.

 

Dont know if you know it or not but get ready. The hemi has 16 spark plugs.

I would try running some Lucas fuel conditioner in a few tanks and see if it helps. Its in the big quart bottle that looks like a differential oil bottle and it cost around 10 bucks at any parts store. The quart bottle treats up to 100 gallons so you only need to put in 9oz at a time. I was getting horrible mileage (16 hwy) in my ram 4.7L and i put some in the tank and filled it up and it gradually got better. by the third tank it was back getting 20 on the hwy. Now i only put it in once a month. Maybe it will help yours out.

 

Don't forget about cleaning that throttle body. Use some non-chlorinated brake cleaner. Real easy to do.

 

Got 8 of the 16 spark plugs done tonight. The bottom 8 tomorrow :/

Hope it helps. The old ones don`t look all that bad to me.

 

Sea foam works pretty well too-

 

could also be fuel related, tire air pressure, intake air filter, sitting at lights or intersections longer than usual, ECT