I know this will sound stupid but here goes. I have just bought a 2012 F-250 Super Duty with the 6.7. All of the owners manuals were there except the diesel supplement. The pictures in the owners manual of the gauges and dash are not what mine looks like. They show a dash with an oil gauge and of course mine has the boost gauge there. There is no oil gauge in the truck and I can't even find an oil light displayed on the dash. Someone please tell me what I am missing. I have the supplemental diesel manual ordered but I don't have it yet, a lot of what I read in the manual I have refers me to the supplement and I hope this manual will answer a lot of questions. Thank you for your help.

 

It's because the diesel has the boost gauge in that hole.

If the 6.2 oil pressure "gauge" is like Ford dashboards of the past, it's an idiot light tied to a switch that reads open past a certain point. On my truck at 6psi the gauge reads in the middle, anything over that it never moves, anything less it reads zero. Absolutely worthless waste of space, it should have been a warning light ten years ago. I believe that the 6.7L has a switch tied to a light, not a real pressure sending unit. Even if the 6.2L gets a "real" gauge like coolant temp, it's programmed to be so unresponsive it might as well be an on/off switch.

 

Thanks Texastech, I cannot believe a truck like this does not have and oil gauge.

 

It does, kind of. It has a switch that registers sufficient oil pressure to run, and will notify you when it doesn't.

IMO the real reason there's no actual "gauge" is that since the operating values vary so widely the average owner would find it useless. Or it would be programmed to be so unresponsive (like the ECT gauge) that it wouldn't be any better than an idiot light that's solid when it's bad then flashes when you really screwed up. Most people ignore the lights as it is, a gauge would be even less obvious.

There's no way Ford didn't test pressure and flow sufficiently during development to be satisfied it won't cause them warranty issues, and it's not like they intentionally build 100k mile time bombs. Plus with multi-grade oils cutting down on the issue of very high cold start pressures there's really just no need for anything more than a warning light. The LPO gauge has gone the way of the ammeter, just not necessary for the vast majority of situations, and would be confusing for 95%+ of buyers.

EDIT: A better example than an ammeter might be the voltmeter. There is a voltage warning light programmed into the 6.0L, which is a platform that could benefit from that particular gauge being real. But took a forum of dedicated gearheads following the lead of an insanely inquisitive engineer to come up with the various readings to watch on that gauge. In another way, we wen't down the rabbit hole and right up the Queen of Heart's throne, but average 6.0 owners don't even know which book we're in. Not hyperbole at all, go check out the 6.0 forum where the current burning thread is about the country of origin for alternator components.