Compression Ignition Addict
Join Date: Oct 2009
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I believe that ford says oil temps around 240* are the limit for the 6.4...not the metal parts, they can handle much higher, but the oil will break down and offer less and less protection...240* is a pretty safe estimate of a max oil temp. My truck has hit 220-225 pulling another crewcab truck on my big flat 5er doing 70-75 on a 100* day up a steep grade with a really annoying headwind...
EDIT: 220-225*F oil temp, my coolant was at 203*F
2008 F250 XLT CCSB- 90k, 5R110W, b&w hide-a-ball, DIY coolant filter, final charge, dieselsite boots, xrt pro, CAI, SGII, egt gauge, DIY egr cooler blocked/bypassed, viper alarm/ remote start, P/S filter
06 VW Jetta TDI- all options, 100k, stock for now...catching up on maintenance...
04 Triumph Thruxton, cr special carbs, TPUSA cams, MAS side-covers, Lossa stubby exhaust, pingel petc*ck, etc...
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Last edited by rt_hawk; 08-04-2013 at 02:58 PM.