New to diesel - help needed

[JayceeP]

I have the LM2 engine in my 24 GMC Yukon SLT. While it is a good performer, I do not get anywhere near the mileage others claim to get, and I have taken several long road trips. The best I have ever done was 31.1 over a 50-mile stretch, but I was stuck in traffic, moving 45 MPH. When I am on the highway at 75 MPH, I get about 25-26 MPG.

I get my DEF at Home Depot. They have the least expensive stuff available, and I only fill it every 5K.

I recommend not getting a diesel if it's for driving around town on short trips. You want to use it on the road. Also, be prepared to see wild swings in fuel prices. Right now, diesel is about $1 more per gallon than regular unleaded.

This is exactly what I get. Nothing wrong with that? Still 30% better than the gasser at least!

I did achieve 30mpg over a 50 mile stretch at 75mph+ however. Was not all flat highway either.

 

[JayceeP]

Thanks for this post. Wondering how DEF has been going when towing now that you have the software update?

I haven’t really had to tow…. Just ran the jet ski 20 miles down the highway to drop it off for winter maintenance and then 20 miles home. Can’t say for sure otherwise.

 

[Z15]