just pondering if using thicker viscosity oil would help with the oil evaporation that winds up coating the intake and components as well as contaminating Nox and OS sensors. In digging into this another benefit would be less fuel dilution.

its one thing to find higher viscosity oil, but also finding one that is on fords approved list may be another story.

food for thought

this BIO oil seems to be the highest viscosity oil so far.

it comes in a few different weight grades (5W40, 10W30, 5W30, 15W40, etc)

 

I've talked to those folks before. Real nice, down to earth people. I always wanted to try that stuff but it's not cheap. Maybe down the line, I'll give the 10w30 a shot.

You talking for use in the warm weather right?

 

It looks like this stuff is rated down to -53 degrees so if I try it, it will be an all year thing .

DEFinitely not cheap

 

i run valvoline 15w40 in my cummins ISC and since i buy cases at a time, its also what goes in the 6.7
both engines have DPF, the cummins has 55 gallon drum dpf and gets HOT HOT
the torpedo in the 6.7 has a hard time ever getting to 500 f

oil is low ash and meets requirement for ash .

6.7 seems to not mind using the oil.

 

Sounds like you want to prevent oil mist from coming through the crankcase ventilation and into the intake? I've tried reducing this effect on an older gasser by varying the oil viscosity and even tried couple different brands with zero luck. The only environmentally good way I found was to add a catch can. That also allowed me to stay with the recommended oil viscosity.

 

x2 on the oil catch can.

 

That's the oils pour point. That does not mean in below freezing temp that your engine would not have a hard time pumping it thru a cold engine. Also when cold, the higher oil pressures may cause the by pass on the filter to open allowing unfiltered oil to circulate. a 15W40 and a 5W40 are both 40W at operating temp.

 

correct

assuming us metro drivers ever get to operating temps.

probally half my warm weather driving and2 thirds my cold weather driving operating temps are not reached.

 

With the designs of the newer motors and the close tolerances they are built by they recommendi running any higher viscosity oil than the book recommends. What they say happens is the oil doesn't flow good enough to get into the bearings and could cause engine failure. It also makes the oil pump work harder which causes the motor to work harder to pump the oil. I'm still using the full synthetic 5/40 @ 70,000 miles I am having no issues with my motor. Still al stock. No added filters but I would like to add the catch can because that would be a good idea.

 

I guess it depends on driving conditions. Lots of stop , idle, and go if your a metro driver. Operating temps self only reached. Fuel builds up in the oil. With 2000 miles on current oil change, I’m at an easy 6.6% fuel dilution.

 

[QUOTE=speakerfritz;20337369...I’m at an easy 6.6% fuel dilution.[/QUOTE]

How do you know that?

 

I always fill 1 Qt low so that my level on the dipstick is at the very bottom of the dipstick range.

1qt divided by 14qts comes out to just below 7%

which means..if the oil level creeps up to full due to fuel dilution in the oil, in at about 7% .

this is just a heads up for me…time to change my oil no matter the miles or what the ford oil change lie o meter says.

 

I would think the 5W would be better, meaning flow more easily than a 15W in the cold winter temps of the North East. Just saying. I'd believe they would both act the same, as a 40 weight as the oil warmed up even if not fully hot. But your truck and your choice my man.

 

Yeah, I know

ifs a matter of diluted 5w or diluted 15w

i put 5w in Nov, Dec, Jan,feb and then 15w the rest of the year.

 

If you are getting that much fuel dilution, you have something going on. Mine is lightly used and mostly short trips around 10 miles. My fuel dilution is .5%, with a 420-degree flash point and it holds viscosity.