I say do not drive it like a gasser if you want good fuel mileage. I see so many people just mash the go pedal, run the engine up to 2900 rpm’s and then wonder why they get poor mpg or things break. Remember your engine is an I-6 not a V8 and makes its power at lower RPM’s. You should always use the torque (TQ) of the engine not the horsepower (HP) to get it going. If you need to mash the go pedal to get on the freeway try to wait until your doing 20 MPH or faster as I’ve noticed less turbo lag and also faster speed ups with out using very large amounts of fuel.

As for warming it up in the warmer weather (above 45 degrees) I let it idle for 1 minutes and then take it easy and keep the engine under 2,000 rpm’s until the temp gauge reads above140 degrees. Oh if you use 15w40 oil in the wintertime (at or below 32 degrees) you may want to warm up your engine for 3- 5 minutes before you drive but keep it under 1800 rpm’s until the engine temp reaches above 140 degrees. JMHO

 

I was having a pretty bad night last night and I went to one of my boy's houses. On my way this idiot was driving down the road and tried to pass me. Boy did he get a window full of smoke and slam those breaks and I got one hell of a good kick out of it. I laughed all the way to my buddies house.

 

Ok, so let me get this straight. Everytime I want to hop in the truck and go to the local Starbucks and/or Jamba Juice I've got to wait a minute or two on both legs of the trip? "Uh...I mean..ahem..when I go to the local lumberyard or speed shop...." Seriously though, how exactly does this cool down thing work? I live in California, so the warming upwon't often be an issue. BTW, when I test drove one last summer, I just shut it down. My apologies to whomever bought that black Ram 3500 quad Laramie. Hoping to soon be a diesel newbie myself.

 

The trubo absorbs a lot of heat from the exhaust. The only thing cooling the bearings on the turbo is pressurized oil. When you let it cool off, some of the heat in the turbo is absorbed by the exhaust and the engine oil. If you don't do this you risk burning up the bearing in the turbo. You really only need to do this if the truck was loaded, or you were hot rodding it. Typical driving, I let mine idle for about 20-30 seconds. That's how long it takes to drop the exhaust temp from 600 to 350.

 

As in other posts, dont forget to mention to keep it in neutral while doing this to keep the trans fluid circulating. that is if it is a automatic.

 

the coking of the turbo bearings is not an issue if you use a good synthetic, the flashpoint of the oil is much higher. general rule of thumb, normal around town driving or unloaded freeway driving and using a good synthic, 30 sec should be good enough to cool things down more than enough. If you using dino oil, wait at least 60~90 sec. this gives the egt's enough time to drop down to a safe level so you dont cook the oil onto the turbo's bearings...

the other thing I didnt see mentioned is that when you on the go pedal and let off your motor will still be wanting to "go" for another second or two until the boost drops.

 

When your building boost (on the throttle) roll off the throttle. If you just let the pedal snap back upit'll cause your turbo to bark.

 

Thanks, I did not know that.

 

wats with the barking stuff??

 

the turbo is spinning extremely fast when it builds boost. when you get off the throttle real quick, there is nowhere for all that air the turbo is pushing to go. The only route is back through the turbo. The turbo makes a barking noise when the air slams against the compressor wheel.