Why L5P Duramax Tuning Won’t Save Fuel Like Your Old 7.3 PSD Did
Modern diesels like the L5P Duramax start from a much tighter factory calibration than older trucks like the 7.3 PSD — here’s why that closes the door on easy fuel economy gains.
Modern diesels like the L5P Duramax start from a much tighter factory calibration than older trucks like the 7.3 PSD — here’s why that closes the door on easy fuel economy gains.