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98.5-02 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect..NO ADVERTISING .

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Old 12-16-2005, 05:31 PM   #1 (permalink)
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How often do you change your oil?

Well, how often?

I try to change mine after 3500 miles and before 5000. I was raised by the worst maintenance person in the world (My Dad), and I'm serious about the worst. Oil changes are usually after 30,000 for him. His 93 cummins get's an oil change every few years anymore, but he's got almost 200,000 on it with no problems :thumbsup . It's had the same air filter since he got it (70k miles I think) he just blows it out once in a while (once a year maybe).

Anyways, it makes me wonder how much maintenance is really needed? It's not just Dad's 93 that's had this abuse either, he had a 90 Ford 460 that went close to 300,000 miles before trading it in. I know of one time pushing 50,000 miles on an oil change. I bought it a new air filter once and it was like adding 100 horses .

So, what do you guys think about maintenance? Are you more like Gary with the extra filters and such (which I wish I was more like Gary in that respect ). Or are you more like my old man, with the super extended intervals?


Oh yeah, Kevin, you've seen the inside of my Dad's 93, what did it look like in there anyway's?

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Old 12-16-2005, 05:47 PM   #2 (permalink)
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i feel sorry for your dads rigs. amazing that he got that many miles out of a 460 with abuse like that.

i formerly changed my delo at 3,000. overkill. i now change at 5,000. my 600,000 miler has been changed at 5k intervals since the begining w/ delo.

now my 97 drw the orig owner ran amsoil and changed every 5k.[gave me several extra 2 1/2 gal jugs] no extra filters on it. i wonder if it would be wise for me to change the amsoil every 10k???????????
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Old 12-16-2005, 05:57 PM   #3 (permalink)
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Delvac Dyno Oil every 5K

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Old 12-16-2005, 06:13 PM   #4 (permalink)
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I run mine 4500 to 5k and change with Rotella T.
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Old 12-16-2005, 06:42 PM   #5 (permalink)
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After repeated 1k oil analysis I've come to the conclusion that Delo 15w40 can safely go 15k between changes with no additional filters.
I play it on the safe side and change at 8-10k.
Engine oils have changed dramatically in the last few years but the manuals that recommend service intervals haven't.
A 3k oil change is a waste of money.
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Old 12-19-2005, 12:30 PM   #6 (permalink)
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I'm running Amsoil 15-40 Diesel oil with a bypass filter. I changed the oil last time at 17K because it just looked too black! The oil analysis came back OK, I just felt that with towing the travel trailer and all that I would change it. I ran Royal Purple before the amsoil and got 20 K out of it before changing. It also had the bypass filter setup.

I think any good oil can be ran further than what is recommended as long as you do an analysis to be sure. The recommended changes are what the manufacturer feels covers the range for different users. The last time I replaced the Amsoil it only had about 3000 miles on it but that was when the head gasket started leaking and the analysis I had done showed a trace of water. That trace was enough for me to drain it and put conventional oil back in until the head work was done. Ran conventional after the head and cam were installed for about 1000 miles and then went back to Amsoil. Will do another analysis at about 7500 miles to make sure all is well with the new components.

NOTE- I am not recommending any oil in particular, just stating my experience. Each person will have his own preference so lets make sure we don't start an oil war here like what got going over on TDR in the past.
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Old 12-19-2005, 12:41 PM   #7 (permalink)
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Rotella T
Fleetguard Stratapore filter

3500-4000 mi

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Old 12-19-2005, 01:12 PM   #8 (permalink)
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Quote:
I'm running Amsoil 15-40 Diesel oil with a bypass filter. I changed the oil last time at 17K because it just looked too black! The oil analysis came back OK, I just felt that with towing the travel trailer and all that I would change it. I ran Royal Purple before the amsoil and got 20 K out of it before changing. It also had the bypass filter setup.
I feel the same way about extending the use of oil well past traditional mileages - the analysis #'s might come back looking like the oil could go longer, but visual indicators worry me.

Some claim oil black with soot particles in smaller sizes do no harmful wear - but coarse sand etches, and finer sand just etches more slowly - same for soot as far as I am concerned.

I prefer to not leave oil in my crankcase any dirtier than I'd be willing to to see pour from a fresh container - generally speaking - and when I can no longer see the dipstick markings thru the oil film, it's time for that oil to go, regardless of analysis...

YMMV
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Old 12-19-2005, 04:02 PM   #9 (permalink)
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Gary,
If you bought an 04.5 you would be changing oil everyday!
The oil on these newer trucks get that dirty that fast.

I change mine about every 4-6k Mobil 1 or Rotella sythetic. Fleetguard filters.
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Old 12-19-2005, 04:57 PM   #10 (permalink)
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Quote:
Originally Posted by Blackout
Gary,
If you bought an 04.5 you would be changing oil everyday!
The oil on these newer trucks get that dirty that fast.

I change mine about every 4-6k Mobil 1 or Rotella sythetic. Fleetguard filters.
That's what I hear about the newer trucks - you can sure bet I'd want a good bypass filter on one of those!

As can be seen in this underhood shot, I'm pretty aggressive ( or fanatical!) about filters:





I get razzed a bit about it, but in regards to oil cleanliness, if you plan on keeping your vehicle for a while, the extra effort is worth it!
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Old 12-19-2005, 06:00 PM   #11 (permalink)
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I still havent had to change my oil.
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Old 12-22-2005, 01:18 PM   #12 (permalink)
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I go 3500-4000 its starting to get pretty black by then ,Like to keep the black "sludge" coating off the rocker arms and other parts.

Gary whats theat hose comming off your oil filler cap, blowby ? Where is it going too?
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