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Mileage dropping on 9-5 Aero

When I first got my '02 9-5 Aero, I tromped on the gas constantly. I got about 23 mpg in-town, and 28-32 on road trips.

Almost 4 years later I've got 65k miles on the car. I decided I need to drive a bit less aggressively so as to reduce my gas consumption. So now, with much calmer driving, I seem to be getting 20-21 mpg in town. I haven't done a long roadtrip recently but I suspect it's down too.

I've got a new set of spark plugs but other than that I haven't had the full 60k service yet.

So: is this 10-15% drop in mileage to be expected, or is something wrong? Will I see the mileage go back up when I complete the 60k service?

Or should I go back to mashing the gas to improve my mileage?? :-) Gary

Reply to
Gary Fritz
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Do you still use the same type of tire and keep it at the same pressure? Been using Premium gas all along?

Reply to
SD

I've been noticing a drop in my mileage on my 2001-9-5 Aero as well. I've got 56-k on it, and recently had to have the plugs replaced because they were "fuel fouled" or so the dealer told me. Except for occassionally using 89 octane, I've always bit the price bullet and put it 92/93 octane. I check the tires every 4-6 weeks. The car seems to run fine. Any filters or other simple mechanicals we should check that might make a difference?

JWL

SD wrote:

Reply to
jwl

SD wrote in news:RKy%f.16$ snipped-for-privacy@news.uswest.net:

No, I got rid of the Pilot Sports after 28k miles -- they were deathtraps on any amount of snow and had irregular wear. I didn't notice a mileage drop on my second set of tires, which were Pirelli Pzero Neros. Currently I'm using Kumho Ecsta ASXs. TireRack.com considers these "Ultra High Performance All-Season" tires but doesn't mention how they affect mileage.

Always. Gary

Reply to
Gary Fritz

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