Diesel , D2 TD5 averages 28/29 mpg (Imp including cruising at 70-80mph on autoroutes. Cruising at 90-95mph it gulps fuel down and also drivers licences when the gendarmes clock you with radar.

 

I highly doubt my Disco would even go that fast.... speeding tickets are my last worry when driving the rover; i drive slooooooow

 

I find myself going under the speed limit more often than over now.....it's a weird feeling to be passed on the interstate, for me at least.

 

Part of my reason for changing totally to 4x4's over the years was to reduce my speeds to a more moderate pace and quell my right foot exuberance and then diesels reduce the speed passion further still.

Problem, petrol engine cars = sports cars + fast coupe saloons = no licence to drive and heavy speeding fines - done that - been there - so now we drive sedately and smile at the scowling gendarmes whilst keepng one eye on the speedometer.

 

I tried a tank on midgrade, mostly highway, and managed 15mpg average. Which is crazy considering I'm driving at altitude in Denver and above, plus I'm on a 4 inch lift and big tires. I guess my engine is solid

 

If Savannah was still around, he would say be careful because the Rover Gods will hear you and curse you forever with problems.

 

Just so OffroadFrance is not the lone oil burner I get the same fuel mileage has he does and here in Germany they have premium diesel and normal diesel never tried the preminum stuff and it costs more, but i would try veg oil if they had it at the pump

 

Rovers run a 10:1 compression ratio. As you see from the posts, you can actually loose 3 mpg by going to a lower grade fuel. At altitudes in CO, you might get pinging which is not good for an aluminum engine. The European cars in our market all pretty much take premium. Everything has high compression engines, close tolerances, supercharge or have a turbo. It has been pretty nice to fill a Rover on MINI Cooper prices with this decline in oil, but remember, how you drive will specify what fuel to use. If you pull trailers, off-road, have a heavy foot, carry loads ( passengers ) sometimes using the right fuel saves you money in mileage and repairs. Your choice, as I know quite a few have driven the older ones on regular for a long time, but they are usually just drivers.

 

I'm in Albuquerque and the elevation is over 5,000 feet, so I've never put a drop of premium in any of my Discos.


With 150,000 miles average on them, are they really high compression engines anymore?


My son gets 16 MPG in the '01, and saw no difference with a tank of premium 91, and he faithfully adds 2 ounces of Marvel Mystery Oil to every 10 gallons of fuel with 86 octane. I just pour a bunch in there.


I think the MMO keeps the rings limber and the injectors clean, and all the benefits of mystery are a comfort that forestalls anxiety.


Just be careful adding the oil to the fuel, because if it goes into the vent it'll set off a 1415 code. I think the oil slows down the combustion rate a bit, and it does permeate all the rubber it runs through.

 

Sure you can run the low-mid grade gas or the high octane grocery chain crap. Just don't be surprised when your CEL comes on. Use a name brand high octane gas and you'll be fine. It's a Rover. It was never intended for fuel economy. Premium is about another .20/gal more than midgrade. 25 gals = $5. That shouldn't break the bank.