Mine drops to 15-25 at idle when warm from 50 - 75 while driving depending on how hot it is or how hard I was driving. This is with the stock gauge.
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Frank W
90 5.0 LX Notchback Daily driver. MAC 2.5" cat back FMS aluminum driveshaft, MSD blaster coil, MAC shifter other stuff check out here
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88 Notch 2.3L FOR SALE!
My two Notchbacks
74 Chevy Laguna Type S-3 Warmed over 305 upgrading to 454 soon