Tire Pressure!?!?
Hardly think undeflated tires would cause a loss of 10+ mpg.
I had my oil changed last week with Moblie 1 synthetic oil, had the plugs and wires changed less than a month ago.
My 'Check Engine' light isn't on, so I hope its nothing to do with the O2 sensors. I do smell sulfur when I get out of the car sometimes, isn't that a sign of the cats being clogged??
I've had the car for about 1.5 years and with over 230,000 km on it, I've never had the air or fuel filters changed yet. The car has been in the family since it was brand new, and they have never been changed I dont believe. I'll ask around to see if that has been done recently...
Any other suggestions?
Cheers,
Alex