Engine/Transmission (1998.5 - 2002) If you run synthetic motor oil will it stop the turbo from cokeing

[VHolloway]

Synthetic Motor Can It Save Our Turbos From Cokeing

I Hope I Have That Rite COKEING

But it's Something To Think About

It May Give Us The Edge We Need To Make A Turbo Last Longer

So Whats Word Around The Camp Fire On This One



Well Let's See

 

[BDaugherty]

My understanding is that a high quality synthetic such as Amsoil will leave fewer deposits than a conventional or low quality oil. However, it seems to me that if you're having "coking" of the turbocharger, possibly letting it cool before stopping the engine would have a more dramatic effect than using differenct oils. The factory turbo's on our engines seem to be pretty tough. I don't know of anyone who's blown one up or worn one out. I'm sure it's been done, just not by anyone I know.

 

[VHolloway]

We Cool Our Truck Down

But Will Synthetic Oil

Handle The High Heat Better

If It Will Make our Engine Or Turbo Last Longer I'm Up For It

If Not Then Ok:-{}

 

[snuff]

coking? what is that... .



i idle for 10min on high way runs, water temp comes down, looking to get a turbo timer.

 

[WrenchRat]

A high quality synthetic will handle the heat better.
High quality conventional oil will start cooking @270F and be leaving high carbon deposits (coking) by 300F.
Synthetic's will better this by well over 100F.

What does your EGT gage read? While these temps are not what the turbo bearings actually see, this will give you a rough idea of the difficult environment the turbo bearings are faced with. Imagine what kind of heat transfer takes place when that turbo is running at 1000F before turbine housing? Toasty in there!

As VHolloway alludes to, it's the cool down that will really help. The cool down time helps reduce the overall temp of the turbo and minimizes the resulting heat soak on shut down.

These values are averages from some journal bearing experiments I ran years ago where thermocouples were embedded just below the surface of the stationary bearing surface and the bearings were loaded until failure occurred.

Synthetics are well worth the extra $$ IMO. I view it as cheap insurance on the longevity of my drivetrain. Properly filtered of course...

 

[icman95]

Ditto on the synthetic. Been using Amsoil for years in my truck and my wife's Durango gasser. I'm not doing it specifically for coking, but just the overall improvement in quality of oil. If you cool your turbo before shutting down, you shouldn't have to worry either way you go.

 

[FourBarR]

Not a beliver in synthetics except in real cold weather. presently have 483,000 kms on original turbo,using 15w40 rotella since new. If you live in northern canada or Alaska I would definately use the stuff. Just my . 02C

 

[VHolloway]

JUST TO THROW THIS IN i WAS THINKING OF ADDING A PREOILER

AS WELL AS USEING SYNTHETIC OIL

THERE MUST BE A WAY TO GIVE THE ENGINE OIL PRESSUER BEFORE START UP AND THEN THE ENGINE OIL PUMP TAKES OVER

BUT YOU NEVER HEAR TO MUCH ABOUT A PREOILER SYSTEM

FOR THAT MATTER IT COULD RUN AFTER SHUT DOWN FOR A TIME TO COOL THE TURBO SOMETHING TO THINK ABOUT

 

[icman95]

Amsoil used to offer a pre-oiler system although I haven't looked for it in a while. If I remember correctly, it wasn't cheap, but it would get the job done.

 

[VHolloway]

check this site out ESP luber

THE ESP TURBO PLUS.

WHEN IT COMES TIME TO REPLACE MY ENGINE I THINK I WOULD GO WITH A PRE AND POST OILER BUT FOR NOW I THINK I WILL MOVE OVER ROTELLA SYNTHETIC 5W40 EVERY LITTLE THING HELPS

AND KEEP COOLING DOWN THE TURBO THE OIL WAY

THE TRUCK HAS 178K ON IT

BUT i LIKE WHAT ESP LUBER

SITE HAD TO SAY

THEY HAVE SOME NICE KITS

 

[2-ND TIME]

oils and turbo cooking oil.

The clearances in turbos are in the 1/10,000 " they need oil to cool the surfaces as well as lubercate. The coking comes from improper cooling for the turbo and engine. This will eventually damage the engine. So let them warmup and let them cool down for 5 to 10 mins before you shut them off. I have been using Mobil 1 5W/40 till rececently now Petro Can's 5W/40 since breakin. $200. 00 for a pail versus $135. 00 for the latter. Fourbar we have about the same KM's on.

 

[VHolloway]

with these trucks we need all the help we can get so i'm going to synthetic #@$%!

 

[MAllen1]

You will not go wrong with synthetics. I've been putting synthetics in my 99 since it had 50000 (now at 225k).

I haven't had a problem at all due to lubrication, even after bumping up power. Amsoil makes a good oil, I use the 15w-40 in my truck and the 10w-40 in my tractor and haven't had a problem out of each.