It depends on your driving habits. I use Redline synthetic ATF in the trans and Quakerstate synthetic 5W30 oil because I only drive the car approx. 50 miles a week and it's 99% hard driving.
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99 Silver GT
4R70W, ProTorque TC(3200), Transgo, FMS Cooler, Synth. ATF & 3.73 gears
Mac L/T, Cat-H, Borla Cat-back
V2 S-trim, AFR p/p, 70mm t/body, Pro-M80, 42# inj., 255lph pump, JMS chip
D&D K, A-arms, Coil-overs, KB Super Subs, Mac Adj. UCA/LCA, MM C/C Plates
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