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[Thread Backward] Re: Oil change F vs. Nav. Next question.Msg # 5230 of 8004 on Powerstroke Diesel Conference (1)To: Jerry + All, From: Janos Dosa Time: Thursday 01-29-98, 09:35 am Hi all What is Nav. extender oil filter technology? I have seen and used, FL-1995, Purolator 44872, and Fleetguard long filters all seemed to be the same. Never seen Navistar version it is not available in Europe. Some of you have stated that oil cooling is the only reason of the extended (8000 miles) interval. If you are in the winter season don't you think that you can get the extra cooling because of the cold? I do have an aux oil cooler too installed by Ford on my 95 E-350. 3 quart difference is not so much. Maybe during summertime it is. I planned to carry heavy loads (this is a work truck) so I have ordered the max cooling pack that was possible on everything. Now I am out of the warranty (110K) so I change the oil myself. It seems the oil is still semi- transparent after 5000 miles and viscosity is still high. Btw highway milage is: 14-15Mpg w/auto w/14" cube box w/ trailer GCVR: 16000 lbs speed is 55Mph during 900 miles half flat half hilly. Almost always (90%) travelled with this config never had a tranny problem. Bests JANOS On Wednesday 01-28-98, 11:12 am, Jerry said: -Is this Mark Thomas? I would need an inline -pressure tank? Sounds sort of bulky. Jerry. - - On Tuesday 01-27-98, 06:20 pm, Mark said: --Jerry, -- --Expand capacity by installing a remote filter --adapter on your PSD then use large diameter tubing --and an in-line pressure tank expansion is only --limited by the availible space. Oil changes will be --bi**h though. -- --Mark -- On Tuesday 01-27-98, 05:00 pm, Jerry said: ---Wish I knew of a semi easy way to add capacity to ---the system. Jerry. --- --- On Tuesday 01-27-98, 02:14 pm, Larry said: ----This is exactly what I was told when I called the ----Navistar help number and asked the oil change ----interval question. ---- ----Larry ---- ---- On Tuesday 01-27-98, 12:44 pm, Jay Chlebowski ---said: ----- On Tuesday 01-27-98, 11:39 am, Janos Dosa -said: ------Ford recommends 3000/5000miles for heavy ----duty/light ------duty usage. At the same time Navistar has 8000 ------miles recommendation with large filter. ------ ------Most of the Ford trucks are in the light PU ------category. Most of the Navistar trucks are in ----medium ------category. ------ ------Why change oil so frequently if the engine ------manufacturer recommends longer interval for oil ------change? ------ ------More frequent oil change is more expensive and ------polluting enviroinment. ------ ------Opinions? ----- -----Howdy Janos! ----- -----I'd say there are two factors enabling -Navistar's -----longer oil change intervals. ----- -----1. Higher oil capacity. The T444E holds 17 ---quarts -----vs. the 14 in the PowerStroke version of the -----engine. The difference probably results from --Ford -----using a smaller oil pan to fit within the --confines -----of the F & E-series vehicles. Since diesels are -----epsecially prone to soot accumulation in the oil -----(and the resulting wear that can occur), the ---higher -----capacity of oil translates in the ability to -hold -----more soot in suspension before a change is -----necessary. ----- -----2. The Extender filter technology. Now, I'm -not -----exactly sure how Navistar makes and/or specs the -----Extender filters, but the 8,000 mile interval is -----always footnoted as requiring the Extender ---filters. -----I'd say they're at least partially synthetic -with -----the ability to trap finer dirt & wear particles. ----- -----Best Regards, -----Jay Replies to this message:
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