I have a 2005 camry 4 cyl with 40,000- My MPG has gone down from
25.7 in April to 22.4 in June. car seems to run fine--- been using the air conditioner a bit more- temp went from 80 in april to over 100 in JUne..is it the air conditioner?-- car does not feel like it needs a tuneup-runs very smooth I have never had a tuneup-bought the car at 32,000 miles--runs fine.. thanks Michael