I have a 2003 Toyota Corolla CE with 135, 000 kms that I've owned for almost 2 years. This summer I parked it for about 2 months and since I started driving it again it's been going through more than usual gas. Tires are at 35 psi, airfilter is clean, put injector cleaner in it, burns no oil, no lights are on, runs strong, tried running a tank of premium though it and didn't make a difference, I don't idle it very long and yet it is burning 30-40% more than usual. I've always gased up at Shell because I found I got about 100 kms to a tank better when I filled up there but for some reason it's been going through alot more than normal compared to last winter. Has anybody had this same problem?