|
1. There is a system developed by Caterpillar and Navistar (more by Cat as I've heard) that uses a fuel injection computer operating Hydraulic Electronic Unit Injectors (HEUI). In this system you have all the increased flexibility of electronic control in a diesel fuel system. An engine driven oil pump (separate from normal lube pump) provides high pressure feed oil (pressure varies from 700-3500 psi) to the HEUI. The HEUI contains an intensifier section and a more or less conventional nozzle. The intensifier is the pump that uses the oil pushing down on a piston that is approx. 7/8" that has a plunger below it that is 1/8" or slightly less. This gives the HIGH pressure diesel pressure that oscillates the nozzle in the conventional manner as on diesel injection. In effect the HEUI is a pump and injector in one. The fuel inj ECM controls how long the oil puhes down the intensifier piston to control its stroke and thus volume by electrically opening the inlet to intensifier piston. The Fuel ECM also regulates how high the oil pressure is through an electrically controlled bleed valve (more bleed-off lower pressure and vice versa).
This is a "drive by wire" fuel system where there is no throttle cable just a potentiometer from accel pedal to ECM.
A host of sensors, most like those used on gasoline fuel injection, are used to provide info for the ECM to operate with. A low pressure lift pump provides fuel to injectors.
2. I have a Ford diesel PU, the filters are available at W-M for it.
I was just referring to the filters for the PU.
3. I know of Mobil Delvac. It is used by many diesel operators but is not as readily available at outlets that sell it at a reasonable price. As far as I know it is very good oil. I don't know if it is any better than the rotella-T or the Delo 400. If it lowers the noise level it must be a good product. I know of a bunch of Volvo diesels that have gone 200K+ ay 7500 mile interval for oil change. Oil gets dirty more or less directly with the amount of fuel consumed as that is where the contamination comes from. Of course number of starts and length of trips made between cold starts are certainly factors. Non-turbo diesels are not that unkind to their oil at all.
4. I don't change my oil any more frequently than the factory interval unless I do something unusual. I live 30+ miles from work and don't drive much in stop-n-go traffic. I NEVER start an engine and run it w/o it warming up and staying at operating temp for 10+ minutes ( I had to move my truck to get car out and I drove it 10 miles down the road and back just to not violate what I just wrote). I've had vehicles that accumulated over 150K miles w/o any engine problems or noises. It is always safe (not necessarily to the environment) to change it more often if your driving violates the things I listed as my driving patterns.
5. I don't know of a site with any good tech info. The Shell site I found in a search struck me as being a sales pitch more than a technical source.
The newest specs for diesel oils for these HEUI-systemed motors requires additives that are more specialized to work well and long in the injectors (foaming oil makes engine run crappy, best way to tell if your Ford with Powerstroke needs an oil change) and carry an API rating CF-4 (might be CG-2 now). Diesels use the 15W-40 and gas uses 10W-30 so they don't feel the need to try to make one oil fit all.
I think I would use 10W-30 in that 460. Increased circulation in gas motors gets rid of moisture and fuel much better. 15W-40 is for 100 degree weather in that engine. Thick oil= sludge in a gas motor. 20W-50 is bad medicine!
|
