| | Riviera 97 SC high fuel consumption? |  |
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arttu80
Member
Age : 44
Location : Finland
Joined : 2007-08-02
Post Count : 80
Merit : 8
| | Subject: Riviera 97 SC high fuel consumption? Sun Dec 02, 2007 11:17 am | |
| Hello all! My girlfriend drives her 1997 Riviera SC to work everyday, its about 2miles trip. When it was summer fuel consumption wasnt a big problem, but now (we live in Finland and its about 23F outhere), this black beauty (no not my girlfriend  ) started to eat major gas. I don't know, but it seems high at 13mpg, while factory rating is 17mpg/city for SC Riv. ??? I suspect thermostat or coolant temp sensor, cause it warms up real slow. You know the gas its expensive in here, at $7,7/gallon!!! Also question; is cooling fans supposed to spin even when engine is cold? thanks ! | |
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Jason
Aficionado
Name : Jason
Age : 41
Location : Comox, BC, Canada
Joined : 2007-01-23
Post Count : 1378
Merit : 66
| | Subject: Re: Riviera 97 SC high fuel consumption? Sun Dec 02, 2007 11:23 am | |
| 13mpg seems about right for such short trips in the cold. My GF gets 14.5 in her regal GS on a 4 mile trip, city only, similar temps. It was a bit higher last year, but I recently put in a wix filter and it dropped.
Check for hidden vacuum leaks.
I don't suspect the car would have time to fully warm up and generate substantial heat in 2 miles. There is no info re: your car's maintenance history or mileage but if you have neglected the cooling system, you should flush it out and backflush the heater core. Inspect the t-stat while you're at it (maybe replace it with a 180 deg... if you plan on doing a few modifications down the road). R&R if necessary. | |
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arttu80
Member
Age : 44
Location : Finland
Joined : 2007-08-02
Post Count : 80
Merit : 8
| | Subject: Re: Riviera 97 SC high fuel consumption? Sun Dec 02, 2007 3:34 pm | |
| Ok, thank you. Its good to know the facts  . Still I wonder factory 17mpg rating... Also I still don't know answer about cooling fans, are they supposed to spin all the time? | |
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RhinoFLA
Aficionado
Name : Ryan
Age : 36
Location : Port Richey, FL
Joined : 2007-02-27
Post Count : 1029
Merit : 4
| | Subject: Re: Riviera 97 SC high fuel consumption? Sun Dec 02, 2007 4:13 pm | |
| - Quote :
- Still I wonder factory 17mpg rating
under ideal conditions | |
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arttu80
Member
Age : 44
Location : Finland
Joined : 2007-08-02
Post Count : 80
Merit : 8
| | Subject: Re: Riviera 97 SC high fuel consumption? Sun Dec 02, 2007 4:52 pm | |
| does anyone care to answer my cooling fan question? | |
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AA
Administrator
Name : Aaron
Age : 47
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18452
Merit : 252
| | Subject: Re: Riviera 97 SC high fuel consumption? Sun Dec 02, 2007 8:30 pm | |
| The fans should normally not come on until your engine is very hot, but may spin when the AC is on. Try starting the car with the AC off. _________________ '05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch^^^ SOLD ^^^  '70 Ninety-Eight Holiday Coupe 455cid • 116k miles^^^ SOLD ^^^ | |
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96RIVMANN
Fanatic
Name : Paul
Location : MN
Joined : 2007-10-22
Post Count : 253
Merit : 11
| | Subject: Re: Riviera 97 SC high fuel consumption? Sun Dec 02, 2007 10:40 pm | |
| I get 23mpg all day long! | |
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arttu80
Member
Age : 44
Location : Finland
Joined : 2007-08-02
Post Count : 80
Merit : 8
| | Subject: Re: Riviera 97 SC high fuel consumption? Mon Dec 03, 2007 11:35 am | |
| 23mpg? hmm I guess it would do that, if driven a little more than 2miles trips!
Well, thanks for good info anyway! | |
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deekster_caddy
Master
Name : Derek
Age : 52
Location : Reading, MA
Joined : 2007-01-31
Post Count : 7717
Merit : 109
| | Subject: Re: Riviera 97 SC high fuel consumption? Mon Dec 03, 2007 9:52 pm | |
| I usually get 15 mpg in warmed up city driving. short trips like 2 mi I could see 13 as normal.
Fans are most likely related to A/C being on.
Good luck! | |
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