| Run the Mobil 1. These guys started the synthetic trend and I've ran it in gassers for 15 years with no problems. My last truck was the Chevy 454 with over 160,000 miles. Before I sold we ran the compression and the thing was still like new. I've been running the 5W40 in the duramax now and have no problems. I noticed you posted a pressure question as well, I posted there also.
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2004.5 LLY, X-Cab, short-bed, Allison Trans, 4" MBRP Turbo-back, no cat, KB's IOH kit, EGR block plate, no finger stick, MB Razor 16x8 with BFG AT 285's |