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keep your experience off the intrawebz and in your left hand.....
lmao
75W140 is a synthetic gear oil, it holds up longer then the regular weights. Plus, I'd venture to say the the trucks you speak of are fleet accounts, which see abuse more often, so shorter intervals are required for services.
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Built 00 Windsor engine, .20 over, 11.6:1cr, fully ported heads, Hardballer intake w/cooling mod, Scat rods, Probe pistons, Cobra crank, tri-metal Clevite race bearings, VT Stage 2 N/A cams, adjustable cam gears, Canton windage tray, MMR oil pump, Cobra pick up, 75MM Accufab t-body, Dragon plenum, JLT CAI, 24# injectors, Bassani mid lengths, mufflers & O/R X,255lph fuel pump, BBK FPR, Fidanza aluminum flywheel, AJE K-member, ARP hardware everywhere, X-Cal SCT custom tuned, 3.73's, Pro 5.0, polygraphite motor mounts, over 300+ RWHP & 320+ TQ
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