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1997 850 Wagon NA Still getting crappy MPG

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
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dairyqueen814
Posts: 186
Joined: 1 July 2013
Year and Model: 1997 855 NA
Location: Worcester MA

Re: 1997 850 Wagon NA Still getting crappy MPG

Post by dairyqueen814 »

Quick clarification
I estimate that my tank fills up to about 17 gallons or at least my gauge always reads one gallon less than I have because before I started all this I would be at 100 miles when the needle was spot on the 12 gallon mark and averaging 20 mpg. So by my estimation my gas gauge is about 5 gallons from full to 12 gallons left.
1994 850 Sedan NA Black, 343,000mi - Crashed and parted
1993 850 Sedan NA Red, 240,000mi - Now my little brother's car
1994 850 Wagon NA White, 251,222mi - Sold
1997 850 Wagon NA Red, 105,000mi - Currently my pride and joy
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Mattman81
Posts: 1
Joined: 23 August 2013
Year and Model: V70XC 2000
Location: Massachusetts

Post by Mattman81 »

Hi:
Did replacing the front o2 sensor fix your problem.
Michael
Last edited by Mattman81 on 23 Apr 2014, 03:35, edited 1 time in total.
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dairyqueen814
Posts: 186
Joined: 1 July 2013
Year and Model: 1997 855 NA
Location: Worcester MA

Post by dairyqueen814 »

I think the biggest help was replacing the bad thermostat and coolant temp sensor
but yet the O2 sensor being replaced did improve my MPG by 1 or 2 (5-10%)
1994 850 Sedan NA Black, 343,000mi - Crashed and parted
1993 850 Sedan NA Red, 240,000mi - Now my little brother's car
1994 850 Wagon NA White, 251,222mi - Sold
1997 850 Wagon NA Red, 105,000mi - Currently my pride and joy
Top
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