How many MPG are you getting in your N* Seville/Eldo? - Page 6

cl1986 · #76 (**permalink**) 08-08-06, 01:11 PM

Quote:

Originally Posted by Mccalist

In florida, 87 is regular, 89 is mid, and 93 is premium. (No 85 octane available.)

Thats wierd cause when i was in florida there were gas pumps with 5 different options.....85 87 89 91 93.....And they were all the same price!!!hmmm which one should i run???? That just made me laugh!!!!

this was orlando / daytona area

thu · #77 (**permalink**) 08-08-06, 01:31 PM

Quote:

Originally Posted by cl1986

Thats wierd cause when i was in florida there were gas pumps with 5 different options.....85 87 89 91 93.....And they were all the same price!!!hmmm which one should i run???? That just made me laugh!!!!

this was orlando / daytona area

How funny! If they're all the same price, try them all, one tankful at a time and see what the differences in power and MPG are.

mtflight · #78 (**permalink**) 08-08-06, 02:14 PM

Last tank I got 15 MPG even, city only (stop and go, parking, drive-throughs, etc). 1998 ETC with 94K miles.

I get great highway mileage when using cruise control @ 70 MPH (26 MPG + average not unusual).

brown1311 · #79 (**permalink**) 08-08-06, 02:36 PM

28....Hwy, 21 City

the727kid · #80 (**permalink**) 08-08-06, 06:02 PM

16mpg

Peter_Reinhard · #81 (**permalink**) 08-08-06, 06:10 PM

Hello. I just curious.
Are you guys just reading the average mpg from the cars computer, or are you actually filling the car up after a specified interval. I have had a 97 ETC for about a year now and have kept track of mileage the old fashioned way, and recorded the car's calculated mpg as well. The numbers differ at bit, both higher and lower than actual.

(Actual mileage is when you fill the car yourself, topping it off in what ever way you can repeat, resetting the trip odometer, and driving. At the next fillup, do it yourself, topping it off the same way, and recording the gallons and miles traveled.)

I've reset the average mpg value when on the highway and have seen it go to 26 mpg, once to 28. But I find that the car gets much worse mileage under ANY acceleration, and your average at the end of a tank will be much lower.

The bottom line is that I don't think these cars get "28 mpg". That doesn't make sense. You may be relying on the trip computer which may have some errors. The fact that a Cadillac can get in the 20s at all is amazing. My dad had a 70s caddy (don't remember the exact model but it was maybe 20' long and had a 472 cu v8) and its gas mileage might have been listed as "Not Applicable".

btw, my 97 ETC, 2/3 highway, 1/3 30-40 mpg roads gets 22-23 mpg.

JimHare · #82 (**permalink**) 08-08-06, 09:57 PM

01 ETC - Going by the DIC readout, which appears to be fairly accurate, I average 20 mpg with my driving - 50% puttering around town, 50% zoom zoom on back country roads

...Melissa gets about 22 in the Deville, and her company supplies her with with a fleet gas card, which is really nice..

the727kid · #83 (**permalink**) 08-08-06, 10:20 PM

How the hell ya'll get 20mpg? Do never ever touch the gas and accelerate down hill to gain speed and then set cruise?

thu · #84 (**permalink**) 08-09-06, 12:36 AM

727kid,

What kind of driving do you do? 16MPG - is that city? hwy? both? My STS gets 24-26 driving 80-85MPH. That calculation is both by the car computer and by the old-fashioned way.

dschwark · #85 (**permalink**) 01-14-09, 10:41 PM

1991 Seville No Mods Premium 150kmiles
18-21 average mpg
26 Highway

N*Caddy · #86 (**permalink**) 01-14-09, 11:04 PM

This summer:

I also averaged over 100 km/h on that entire trip (the hwy part of the trip was 117km/h average).

nacoop · #87 (**permalink**) 01-21-09, 03:54 AM

95 ETC 106,000
22 Highway
13 City
18 Mix
Only premium (91) from 76

MaupinMan16 · #88 (**permalink**) 01-21-09, 05:00 PM

I drive a 2000 Cadillac Seville STS with 75,287 and i run Shell V-Power 93 octane or sometime Sunoco Ultra 94 in my car since shell gasoline has five times the amount of additives in the fuel to clean your engine while it burns. Its five time higher then the goverments mandated amount of fuel addititves. I do not have any performance add ons yet.

I get in the city 18.4mpg and the highway around 24.9mpg

SwampeastMike · #89 (**permalink**) 01-21-09, 06:13 PM

'99 STS, 140k, 2+ tanks of premium fuel, all in a sprawling, very hilly town; 15.1 mpg @ 20.1 average speed.

24 mpg on hilly interstate when driving quickly to the airport about 100 miles north; 26 for same trip when not rushing. 28 cruise set at 70 on straight to infinity, dead flat interstate through the MO bootheel which is mainly former Mississippi river floodplain cypress swampland drained in 1900--now mainly cotton and rice farming.

ga_etc · #90 (**permalink**) 01-22-09, 03:22 AM

99 ETC. 17-18 around town with spirited driving. The last time I actually put it on the road the last tank of gas from North FL back to North GA the AVG MPG on the computer hit a peak of 27 before getting caught in Atlanta traffic. On the trip to Fl I learned that the octane of the gas you're running makes a big difference on the interstate. On the way down I was running 89 octane and averaged 22.5-23. Once filled with 93 mileage jumped to 26+ with the cruise set at 80 running the air. Around town the grade doesn't matter as much but still keep premium in it now.