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For short drives EGR on (or a dynamic EGR, if your tuner knows how) is best.
EGR is good for engine warmup.
There's less metal and bearing wear when oil is warm. Coldstarts are where engines wear the most.
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-2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs.
-2019 M2 Competition MT, Alpine White. Self-tuned 560hp
-2016 Mini Cooper S, MT. Many plans.
Others:
-E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
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