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Old 02-03-2007, 09:15 PM   #29
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Quote:
Originally Posted by john hd

i have started my '98 6.5 turbo in -22 degree weather without pugging it in.
mine is PUGGED in tonight....it was real hard to start this afternoon in 6 degree weather....almost didnt make to the tavern....block heaters make it nice for almost instant heat, and it easier all the way around on the equipment.
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Old 02-04-2007, 10:38 AM   #30
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Question High Idle

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Originally Posted by BillTex
Yeah-the Duramax has a high idle feature built into the DIC.
BillTex:

It's too darn cold and I'm too darn lazy to go out and check my 2003 for that feature! Do you know whether or not it's on the 2003?
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Old 02-04-2007, 04:29 PM   #31
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Quote:
Originally Posted by Cracker
BillTex:

It's too darn cold and I'm too darn lazy to go out and check my 2003 for that feature! Do you know whether or not it's on the 2003?
No it does not , but it can be added . Check The Diesel Place and do a search for high idle mod .
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Old 02-04-2007, 05:13 PM   #32
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because of so much towing i am now using 5w-40 syn for winter season...


2air.
I was talking to the ford service person at a large dealer near orlando yesterday. I asked him what I need to do to keep my truck as trouble frre as possible. His reply, do all the scheduled maintanence and never use synthetic oil. I did not ask why but I typically do not synthetic.

I plug in below +40F. We preheat our aircraft engines when it gets that cold. It never hurts to have the oil warm before you start the engine. it flows better quicker. this is important to reduce startup wear.
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Old 02-04-2007, 05:21 PM   #33
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Originally Posted by thecatsandi
because of so much towing i am now using 5w-40 syn for winter season...


2air.
I was talking to the ford service person at a large dealer near orlando yesterday. I asked him what I need to do to keep my truck as trouble frre as possible. His reply, do all the scheduled maintanence and never use synthetic oil. I did not ask why but I typically do not synthetic.
It sounds like the ford service person might have an axe to grind with respect to oil use! There's just about an equal number of pro-con advocates for dino vs synthetic. With respect to cold weather, IMHO the available data seems to give synthetic the edge. I seriously doubt if your service person could back up his position with sound facts.
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Old 02-04-2007, 05:30 PM   #34
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The reason I did not ask was I usually chaged my oil before the regular maint period. At least in aircraft engines it keeps the sludge accumlation down.
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Old 02-04-2007, 05:51 PM   #35
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Quote:
Originally Posted by thecatsandi
because of so much towing i am now using 5w-40 syn for winter season...


2air.
I was talking to the ford service person at a large dealer near orlando yesterday. I asked him what I need to do to keep my truck as trouble frre as possible. His reply, do all the scheduled maintanence and never use synthetic oil. I did not ask why but I typically do not synthetic.
Just because he turns a wrench doesn't mean he know about oil properties.

In my new truck at 2300 miles I switched to synthetic, now at 7600 miles my oil percent guage reads 63% left on oil life. So at this rate the oil may go 10,000 miles. The dip stick shows clean. I'm using 5/30 in my 8.1.

You can't get that many miles on dyno, let alone be clean.
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Old 02-04-2007, 09:08 PM   #36
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Quote:
Originally Posted by thecatsandi
I was talking to the ford service person at a large dealer near orlando yesterday. I asked him what I need to do to keep my truck as trouble frre as possible. His reply, do all the scheduled maintanence and never use synthetic oil. I did not ask why...
hi michelle

that doesn't surprise me. opinions on oil are as varied as politics and religion...

and with just as little evidence...

when i showed up for my last oil change (at a large ford dealer) with 4 gallons of rotella t 5-40 syn,
the head diesel mechanic AND the service manager found me.
they wanted to say "thanks to a customer who obviously cared about his truck."

without knowing why your guy said 'no syn' i don't know how else to reply.
and i'm clearly just an enthusiast car guy....

-all of the other lubricants in your truck are full synthetic from the factory.
-synthetic oils have a proven record for many auto applications.
-i can think of only one auto/truck engine maker that specifically advises against synthetic engine oil.
-many high performance cars now come with synthetic oil from the factory.
-the extended drain intervals many europeans use are based around synthetic lubricants.

-the issues with turbine/aircraft engines are different that piston engines. shear isn't a problem but heat build up after shut down is...
also service intervals tend to be better followed on aircraft. as i recall most early synthetics were developed FOR the aircraft industry.

it is my opinion that for car/truck engines that have turbos coking is a bigger issue than sludge;
so oils with higher flash points and better base stock are a good thing.

there are some issues specific to the 6.0 liter psd too....
-the fuel injectors rely on engine oil for operation and at very high pressures (500-1500psi)
-so the anti foaming agent in the oil is critical. IF the afa is depleted the oil can foam up, which will reduce injector pressure.
-this leads to poor performance and wear issues.
-we must use service rating Cl-4 oil, syn or dino.

-soot and other suspended wastes build up in all oils, and even with syn this is an issue.
-anyone considering prolonged oil change intervals SHOULD have an oil anaysis done midway; again regardless of oil brand.
-the 'ford recommended' interval for oil changes is 7,500 miles. severe duty 5,000 miles.
-they don't offer anything more specific for towing full time.
-ford also recommends 5w30 for temps below 20 degrees f, but 15w-40 for towing.

so in MY case (towing and cold weather) i opted for 5w-40.
-all of the 5w-40 diesel oils are synthetic as i understand.
-the switch to 5w-40 showed immediate improvements in start up and fuel economy.
-i've got 40,000 miles on the truck in 20 months...and usually change oil at 4,000 miles. so i've done nearly 40 gallons of oil changes!
-with the syn, i plan to do an oil analysis at 4k and change the filter.
-IF the oil analysis checks out, i'll extend the change interval to 8k and add the ford antifoaming agent IF needed.

i waited until the diesel engine was 'broken in' to go with syn...
and will be interested to learn what the oil analysis shows....
for the warm season i wil go back to 15w40 syn...

i make no comments on the cost/economy of syn/dino...need a spreadsheet with so many variables
my dealer only charges 19$ for an oil change IF the customer supplies the oil.
i can't buy a filter AND recycle the oil for that price.

sorry to sidetrack this thread.

oil can be a very touchy subject, and clearly your mileage may vary...

and lipets...IF this was a 'service person' rather than the mechanic, he/she may not turn any wrenches!
i've found that many big shops only have 1-2 trained diesel mechanics hidden somewhere...

cheers all
2air'
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Old 02-04-2007, 09:27 PM   #37
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Last I knew...

Quote:
Originally Posted by thecatsandi
The reason I did not ask was I usually chaged my oil before the regular maint period. At least in aircraft engines it keeps the sludge accumlation down.
the last i knew, say a syn oil like Mobil 1, is not approved for piston aircraft by the FEDS. last i knew. if the FAA says no, there must be a reason, and it's not about sludge.

key words, "last i knew". which ALWAYS gets me trouble.

i have'nt heard any different, which does'nt mean anything.

and as noted above by mr. air, my corvette and all new corvettes come w/ syn oil (Mobil 1), as do a lot of new cars and trucks. several things make syn oils work well in autos is no ash (not carbon based), and the molecules are all the same size (again not carbon based). but you knew that.

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Old 02-04-2007, 09:40 PM   #38
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At least some aircraft engne mfrs. have dropped synthetic, and the "given" reason was that some (especially privately owned) aircraft engines have operational regimes with long periods of non-use. During those weeks of hangar sitting, the "slipperier" syn. oils dripped off of e.g. camshafts, leaving little or no residual oil film, with big wear on start-up and fewer engines making TBO. Thus, risk of catastrophic failure, increased warranty costs, etc. I "suspect" that it would be a different story with engines run often, but don't "know."
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Old 02-04-2007, 10:14 PM   #39
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Quote:
Originally Posted by LI Pets
Just because he turns a wrench doesn't mean he know about oil properties.

In my new truck at 2300 miles I switched to synthetic, now at 7600 miles my oil percent gauge reads 63% left on oil life. So at this rate the oil may go 10,000 miles. The dip stick shows clean. I'm using 5/30 in my 8.1.

You can't get that many miles on dyno, let alone be clean.
I've got an '06 GMC D/A Sierra. As I understand it, preprogramming in the onboard system suggests oil life remaining. That point is linked to the number of startups, length of trips, and pattern of use tabulation. It does not actually measure the remaining characteristics of oil function. IMO it is totally dumb & ignorant on judging performance between dyno & synth.
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Old 02-04-2007, 10:22 PM   #40
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Quote:
Originally Posted by Canoe stream
I've got an '06 GMC D/A Sierra. As I understand it, preprogramming in the onboard system suggests oil life remaining. That point is linked to the number of startups, length of trips, and pattern of use tabulation. It does not actually measure the remaining characteristics of oil function. IMO it is totally dumb & ignorant on judging performance between dyno & synth.
that is correct. it's based on an algorithm, in a ROM, contained in the underhood black box. this first showed up in the 1990 corvettes, in the GM lineup. most if not all HIGH END cars and trucks have this feature, if for no other reason, than it drives business to the dealers for service.

but thats all based on "last i knew".

kevin
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Old 02-04-2007, 10:50 PM   #41
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Hi, since you all are discussing oil and Ford Diesels, I feel the need to jump in on this subject. First, although I am off on dissability, I am still employed at a Ford dealer. Second, at least here in Southern California, we only use 15w-40 weight oil in all of the Ford Diesels. And Third, we only use Motorcraft Oil supplied by Orange Line Oil Company [Ford authorized distributor] and it is a Synthetic Blend; As is all oil for cars and trucks used at our Ford dealership.
At least where I work, Regular oil..........No. Synthetic oil..................No.
SYNTHETIC BLEND.....................YES.
That's my story and I'm sticking to it. And I don't see any reason for any Ford dealer in this country to go against Ford Motor Company's decission on this except for maybe Viscosity for the region.
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Old 02-04-2007, 11:07 PM   #42
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From GM

GM's patented Oil Life System (GMOLS) can double or even triple the time between oil changes when compared to the common 3,000-mile recommendation simply by evaluating driving conditions.
"This car care season, most owners of 2004 GM vehicles won't have to worry about deciding when to change their engine oil because leading-edge technology will determine the right time for them," said Peter Lord, executive director, GM Service Operations. "Simply visit your GM Goodwrench dealership for an oil change service when the vehicle signals and you won't have to worry about how many miles you have driven. This alone could save consumers significantly on the number of oil changes they purchase over the life of the vehicle."

GMOLS is on about 95 percent of the vehicles that GM produces today and on a wide variety of models since the mid-1990's. There are roughly 20 million vehicles on the road today equipped with GMOLS. The system itself uses an algorithm that tracks engine revolutions and temperature and predicts oil life based on these parameters and driver use.
GM's New Simplified Maintenance Schedules Challenge Industry Assumptions
GMOLS technology allows GM and GM Goodwrench dealerships to offer all new Simplified Maintenance Schedules on most 2004 vehicles to simplify maintenance for GM customers and to build long-lasting customer relationships. The new schedules are a departure from the typical industry approach of basing maintenance intervals on mileage. Instead of a complicated list of different services to be performed at different mileage intervals, GM's new Simplified Maintenance Schedules are based on the change oil light/message.

"The oil-life monitoring technology involves computerized monitoring of engine revolutions, operating temperature and other factors to determine when a vehicle's oil should be changed. Rather than depending on fixed oil change schedules that may not be suitable for all situations, the monitoring system customizes oil change schedules based on a vehicle's engine and transmission type and an individual's driving habits."
I imagine that it factors in driving habits, temperature, rpms, frequency of high revs, distance, time in engine, etc. The system utilizes a pretty sophisticated algorithm and I imagine that it should be better than most people at determining what an appropriate time frame for an oil change is.

Plus, don't forget that the system also monitors other, non-engine determined factors to determine which level of maintenance is required too

GM has the Corvette max motor oil change (ideal conditions) at 15,000 miles based on using synthetic oil.
I believe the Acura starts at 10,000 miles. Both systems subtract from an ideal top number based on less than perfect operating conditions.


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