Bob,
Your GT has the high output turbo is rated at 220 HP, compared to the 180 HP turbo available in the Touring and Limited Editions.
The PT does not have a boost gauge as standard or available equipment from Chrysler. You will need to buy one if you wish to monitor this parameter.
Your mileage average is pretty good. To get better mileage, keep your foot out of it and use cruise control, but what's the fun in that?
The Stage 1 upgrade from Mopar will increase your HP to 235 and increase your torque from 245 lb-ft to 260 lb-ft. You can add a Psi-Fi Power Paq or a combination of the Greddy e-manange and e-01 boost controller for further laptop tuning. However, a wide-band air-to-fuel sensor will be needed to keep everything safe.
You can pick up a turbo timer to keep your engine running for a few minutes after use. You can search for those as I do not use one or have heard of a preference.
The switch to Mobil 1 or any other full synthetic oil will keep the turbo running longer. Even though the turbo is oil and water-cooled, the synthetic oil will help prevent coking of the turbo bearings. You should not have a problem with the synthetic oil as I run Mobil 1 in both of my GTs.
Scott
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