poor fuel consumption lately 535

[mikemaster]

Lately I've been averaging about 17.5 mpg compared to around 19.5 normally.
Could hot weather/using the a/c be responsible for that much drop, or should I look into this a little more closely? She's been thoroughly tuned up within the last 10,000 miles, but I'm not sure how old the oxygen sensor is. Thoughts?

[Kalevera]

How in the world do you get 19.5mpg?

I got ~ 19.6 when I reset the car, then did a few highway trips (~ 22mpg) before resuming my 25 mile commute (about 50% of which is ~60mph).

When upgrading my GM (two weeks ago?), I disco'd the battery. In the past 370 miles, I've gotten ~ 16.8mpg on the commute, which is what city driving's supposed to be for these cars.

They're not light on gas, mate

best, whit

[Paul in NZ]

2 mpg could easy be using a/c,

[mikemaster]

How in the world do you get 19.5mpg?


best, whit

Probably a combination of EAT chip and recent tune-up. IIRC, some of the other 535 guys here were doing better mileage than mine in past discussions.

[Rory535i]

2 mpg could easy be using a/c,

i agree