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First of all, you need to calculate your exact fuel mileage over a number of tank fill-ups - at least four or five. You don't need to know or care about your tank capacity to do that. That a "good portion of my gas is gone" doesn't mean anything. Calculate your fuel mileage manually - ignore what your trip completer says. Or post the number of gallons you add and the odometer reading at each fill-up and maybe we can help you calculate. It helps make the calculations more accurate if you run the tank down to below a quarter full before you refill the tank. If the weather is good and I am driving locally, I'll even run my tank down until the low fuel warning is displayed. Regular air in your tires is plenty good enough. Just make sure that the pressures are at least those shown on the door jam and remember that pressures rise and fall about 1 psi per 10 degrees of temperature change. If you check your tire pressures in a warm garage when it is cold outside after your car has been in the garage for a number of hours, you will need to raise the tire pressures above what is shown on the pressure gauge to handle the colder outside temperatures. For example, if someone sets their tire pressures at 30 psi on a 90 degree August day, the pressures will be at a dangerously low, and fuel economy crushing 21 psi on a zero degree winter day. Off hand it sounds like your Toyota dealer is "blowing smoke" and trying to sell you needless services. Flushing a power steering system seems to be one of the latest scams and that certainly doesn't have anything to do with fuel mileage. I've never had a power steering system flushed or a throttle body cleaned in the 462,000 miles we have driven four Toyota/Lexus vehicles with fuel injection since 1990. The revised EPA ratings for your 2007 ES350 at www.fueleconomy.gov are 19 mpg city; 27 mpg highway; 22 mpg combined. If you commute is a mix of city and highway driving, then 22 mpg would be typical. Finally ... have you had your ES350 a long time or did you buy it recently and are finding that its gas mileage is not what you expected?

Just FYI it's nitrogen that you can put in your tires. Its benefits are debatable, but I like the way tire pressures stay pretty stable with it.

I just acquired a immaculate 2000 LX470. I am slightly familiar with its LC version So far I love it I love the body style much better than current gen. Anyways My questions and concerns are the engine has a very tiny miss when idling its hardly noticeable I was wondering if that could be maybe because the dealer did not put in Premium gas? Maybe a Tune up? I have only had it for about 48 hours so far so As of right now till i have time its going to be a guess. On the other hand good new would indicate that my AHC seems to be properly working correctly But as I have read and just out of a Pre maintenance I might flush and replace the fluid in that and the brake system even those are working great! It does have High miles and only had 1 previous owner who seems to have taken great care of is , no paint fade no paint chips i dont even notice any normal wear and tear scratches, Inside is just as great! Leather is hardly worn So i am pretty confident it was well taken care of. I notice a small amount of cabin noise witch i am guessing is from the new tires the dealer put on it and non factory rims and or I notice the seals around the doors are no longer as thick as they should be they are all pretty flat So i am going to replace those and see how that works out. Other than that seems pretty perfect other than it only having the secondary non alarm key.. I am guessing I can buy one on ebay and use the programming instruction it just seems silly to have such a nice ride and no keyless entry lol. If you guys would like to give me any advice on key things to check for it and service to get done let me know and if they are DIY please provide details on how to complete the tasks. Thank you all in advance and look forward to being a active member! Also I am interested in any retro fitting from newer models to enhance looks or functionality. Such as factory LED tail lights? I am pretty sure they offered them near the end of this run but I could be wrong. How about a Factory HID setup if not a high quality after market system would be fine. In addition I would love to see or know about aftermarket GPS installs or what is needed or recommended? Other than that any other fun advice would be great.