2002 Volvo S80 gasoline mileage

Tiny
JOHNMARTINEZ
  • 2002 VOLVO S80

2002 Volvo S80 6 cyl Front Wheel Drive Automatic 80000 miles

When I first bought my used Volvo I would fill up the gas tank with 93 Octane and the electronic gasoline meter would say I can get 585 miles to the tank but in reality with city driving I would get about 425 miles. Then I changed the spark plugs to the Bosch Iridium which cost almost 9dollars a plug and the oil & filter and the air filters and now when I fill it up with 93 Octane it reads 460 miles to the tank and I get much less than the original 400 miles on city streets. I always went to the same gas station and received a reading of 585 but when that changed I went to 2 other gas stations and it remained at 460 miles.

Could it be the spark plugs? Should I stick with original Volvo plugs. I looked at the old plugs I removed and they were really old and worn and had no name branded on them.

Thank you.

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Wednesday, June 18th, 2008 AT 1:34 PM

3 Replies

Tiny
DOCFIXIT
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How about we check the fuel milage the old way, fill up record milage drive the tank out refill record milage. Then divide gal into miles see what you get.

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Wednesday, June 18th, 2008 AT 1:52 PM
Tiny
JOHNMARTINEZ
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I did that 2 times after the tune up. This is my 3rd complete fill up and waiting to see the end results. Before the tune up I was getting about 425 miles on the city streets. After the tuneup I was getting about 375 on the same city streets.
Thanks.

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Wednesday, June 18th, 2008 AT 2:38 PM
Tiny
DOCFIXIT
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Have the computer scaned for codes see if that gives a clue as to what happened.
Let me know

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Wednesday, June 18th, 2008 AT 2:47 PM

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