Looking for some opinions on the 6.7L twin turbo diesel engine. The salesman told me that this diesel engine was not effected by short trips like the older diesel engines were for not being able to get hot enough to obtain normal operating temp and causing engine wear.

 

The 6.7 liter engine has twin turbos?

 

Any time any engine starts cold it wears faster than when it's warmed up, short trips are a beating on any engine. The 6.7L isn't a HEUI so it doesn't have the same immediately apparent cold start and driveability issues that the 7.3 and 6.0 have because cold oil isn't being used to fire the injectors, but there's still an EGR, plus a DPF that has to get burned out. Frequent short cold trips aren't going to be good on any diesel, you're more likely to have emissions issues, plus increased fuel dilution of the oil.

 

The 6.7L PSD does not have twin turbo's.

As already mentioned...it is advisable to get the diesel to normal operating temp. If not...YOU will have engine issues in the long run.

Salesman = sales. That person...is just trying to sell a SuperDuty.


biz

 

How can you tell when a car salesman is not telling the truth?

His lips are moving.

 

The 6.7L does not have two separate turbos, but rather a single turbo with two turbos within. A smaller one that spools up quickly and helps spool up the larger turbine. It is supposed to reduce turbo lag. At least that is what I was told.

 

Not exactly. It's two sets of compressor vanes on the same shaft. Here's how it works: DualBoost Single Sequential Turbocharger

 

what would you call a short trip?

 

The rule of thumb I always followed with my 7.3 was 10 miles one way minimum. The new diesels have like states above lots of new tech that requires the truck to get to temp and stay there for some time. You will have DPF and EGR issues as well as contaminated oil with traces of fuel and or water.

In the car business there's another saying, there's an (donkey) for every seat!

 

Thanks for the info I will now take the long way to the commuter lot and home from it.

 

Well a "short trip" depends on where you live. Right now it's 21* F out and it can take much longer when it's near or below freezing to warm up.

 

Whatever doesn't get oil and water up to temp.

Personally, since I have back-up vehicles if I'm not going to use it long enough to justify the cold start I won't bother cranking it up, because frequency/ total number of cold starts will drive shortening maintenance intervals more so than not getting it up to temp on a short drive; it doesn't matter if it's warm for a minute or an hour, all the fuel got past the rings and all the cold-start wear happened while it was warming up.