> My '98 S70 is about 106k miles now. A mechanic friend told me all it
> needed for 100k maintenance were things like oil/filter change, fuel
> filter change, transmission fluid change, and new spark plugs (all
> However, I'm wondering if I missed anything like engine timing
> adjustment or any type of adjustments?
> I ask because over the last 8 months my gas mileage has been dropping
> from 23MPG to 19MPG (87 gas always used) without change of driving
> conditions or habits. Such drop also conincided with the time when then
> odo reached 100k.
> Adding of fuel injector cleaner didn't help.
> What should I do to bring the gas mileage back?
First make sure the wheels rotate freely after driving the car to make
sure the brakes aren't hanging up. When spinning the fronts, don't
mistake resistance from the differential for dragging brakes.
They're not regular maintenance, and usually (but not always) set a
fault code when they're starting to go bad, but the front oxygen sensor
can cause this.
Also I didn't notice any mention of the air filter. And there's nothing
Thornhill (near Toronto), Ont.
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)