Fuel avg MPG sux

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JasonH

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First post!
I took delivery of my new Platinum Max yesterday. Traded my 19' Landbruiser in on it. The plan is to drive to my place in Florida (from central NJ) a week from this Saturday and I'm very interested in the mileage for two big reasons. One, obviously economy and the other is range. I do the 1150 miles in one shot averaging 75mph and am looking for stops around every 500 miles. I could get almost 18 in the LC but the range sucked with the size of the tank plus as nice as the LC was it was not a great long distance,high speed cruiser.

Don't expect mileage new to be as good as it should be until I get some miles on it.

For what its worth I also have an 08 Cayenne S at the house down there that will get 19 highway but its got 180000 miles on it and I just don't trust it for the long trips anymore.
Congrats on the new arrival! The only things you really need to know are that the Max has a larger fuel tank, and speed and fuel economy are inversely correlated. A 20% fuel economy hit due to speed is around $20 - $30. It's a $60,000+ vehicle. Something tells me you'll be alright.
 

dlcorbett

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First post!
I took delivery of my new Platinum Max yesterday. Traded my 19' Landbruiser in on it. The plan is to drive to my place in Florida (from central NJ) a week from this Saturday and I'm very interested in the mileage for two big reasons. One, obviously economy and the other is range. I do the 1150 miles in one shot averaging 75mph and am looking for stops around every 500 miles. I could get almost 18 in the LC but the range sucked with the size of the tank plus as nice as the LC was it was not a great long distance,high speed cruiser.

Don't expect mileage new to be as good as it should be until I get some miles on it.

For what its worth I also have an 08 Cayenne S at the house down there that will get 19 highway but its got 180000 miles on it and I just don't trust it for the long trips anymore.
I did a big right up on my 18 expy going from del to Orlando and back. In terms of mileage, it netted me a bit over 500 mte cruising avg 72mph.
 

1badhabit

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Maybe I missed it, but are you going by the AFE readout on the cluster or are you hand calculating it?

Edit to add: our '21 with 3.31 gets 17ish city and 21+ highway.
 
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SyndicateZ

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Maybe I missed it, but are you going by the AFE readout on the cluster or are you hand calculating it?

Edit to add: our '21 with 3.31 gets 17ish city and 21+ highway.
I am getting the same hand calculation as my dash. Ive got the 3.73 final
 

2018ExpyPlatinum

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Boost kills gas mileage. Period! I don't think there's any "false advertising" going on with mileage. Many of us DO get around 17 in the city. My last tank was 18. If you're down to 12, it's either your driving habits, your geography, weather, or there may be an issue with your truck. I never got that bad even brand new with no miles. Also, if you're in "sport" with AWD engaged, that'll kill your mileage too. I ran sport and AWD and that tank (city) was down around 14-15. And you have to hand calculate. My cluster is higher than hand math.

Hopefully, you didn't buy this thing expecting "good" gas mileage. Again, it's a 6000 pound brick. FWIW, my 668 hp V8 Blackwing is surprisingly more fuel efficient than my Expy is. I figured that would suck on gas, but that'll get 20+ aound town driving hard. Highway it'll easily get 25-27.
 

dlcorbett

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Our 22 cx9 won't avg even 23 mpg on the hwy and it's only 4500lbs.
 

Zig10

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This is the right answer. For those that want better fuel economy, stay out of boost. it's hard because the turbos can spool very quickly low in the powerband, but under 2,500 RPM is a good compromise. I've gotten 12 mpg highway and I've gotten 22 mpg highway. All dictated by my right foot. In city driving, try coasting often and driving 5 mph below the speed limit to offset the periods where acceleration from a stop is needed.
Consistently drive 5 MPH under the speed limit where I travel and you quite literally will likely be shot or run off of the road.

I'll take the MPG hit.
 

Avee8tor

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When I had my 18 XLT I found switching to 90 REC non ethanol I saw a gain of almost 2mpg, never ran it in ECO couldn't stand the gear change sequence, in fact preferred the handling and driving in S. Averaged 15-17 around town and 23+ overall.

Will be interested to see when my 23 arrives what it will do.
 

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