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I have a freightliner M2 on order. These trucks since 2001 have been running 28-30,000 psi at the injectors. The engine I've been inquiring about is the MBE-900 which is 300/860. From NY to Florida when I stopped for fuel at the T/A's and other truck stops that serviced Freightliners, I asked about injector problems and none of the shops have heard of or repaired any. Freightliners run filters in series 1st is a sceen filter 2nd is a media filled filter. Nobody knew the micron ratings but they have trucks with over 250,000 miles with no issues. Being that these trucks are used mostly for business livelyhood, I find it very interesting that there's two fuel filters factory equipped and they rate the engines for 500,000 miles before overhaul. That number also includes the injector life. Their recommend fuel filter change is 10,000 miles with replacement of both filters. I think the trucking companys are aware of the possible problems that can occur with the higher fuel pressures and already addressed it. For a truck that logs so many miles I feel a 10,000 mile fuel filter change should shed a little light on what to do with the Dmax. Secondery filtering and maintance might be all thats necessay to avoid injector issues. I have 21000 miles towing and a secondery filter since 1000 miles, and additive used every tank with not so much as even a hint of trouble. Time will tell
