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  #1  
Old 06-19-2008, 10:08 PM
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How many hours between oil changes

Hi, My diesel SEC is done and about to become my daily driver, I promise a full detail buildup thread in the near future.

One of my current issues is I have no odometer, (speedo works but no odo), speedo is also from a w124 and does not read correctly

However I have an hour meter installed, so What I would like to know is the recommended oil change interval for highway driving in hours. Does anyone else use an hour meter instead of a odometer.

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1984 Euro 300SDC, (4spd standard)
1986 Toyota Landcruiser Diesel HJ60 5spd X2

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1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D
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  #2  
Old 06-19-2008, 10:13 PM
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I recommend 75 hours.
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  #3  
Old 06-19-2008, 11:46 PM
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Based upon an average speed of 55 mph, the recommendation would be 55 hours for dino oil and 90 hours if you use synthetic oil.
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  #4  
Old 06-19-2008, 11:59 PM
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When I drove my SD which had a dead odo I just did it every 6 months. I knew about what I was driving mileage wise. I usualy average 1k miles a month at most.
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Old 06-20-2008, 11:13 AM
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I have had International Harvester trucks since 1966. some where along the line I aquired a huge manual that covered just about everything.

I read somewhere in there that 35 miles equaled one hour of operation.

Charlie
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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

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  #6  
Old 06-20-2008, 12:40 PM
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my boat diesel (3-cyl) recommends 90-100 hrs
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  #7  
Old 06-20-2008, 06:12 PM
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Or.. just do it by the fuel gauge -- change it every 8 tankfuls (8 tankfuls * 16gal/tanful * 25MPG = 3200mi). If you're doing lots of highway driving, you're probably getting >25MPG but its highwy miles.
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  #8  
Old 06-20-2008, 08:14 PM
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gimme a low-tech 240D
 
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Dog's simple solution to solve this dilemma: Reconnoitre 350 miles approx and yer tank's on last quarter ready for fill. Umm, yer fuel guage works dont it?? Thus 10 tanks of fuel deserves oil change!! Hence throw away the hour meter as bein near useless, mark notepad and/or stack fuel receipts, thats all ye gotta do.

Basically: each fillup x 10 = oil change....... nothin simpler than that.
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  #9  
Old 06-21-2008, 02:01 AM
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Quote:
Originally Posted by bbail2x2 View Post
with all due respect to all the MB guru's who know a whole lot more than I do I would like to add my 2cents. I read somewhere recently that the idea of changing oil every 3000 miles is overkill. and that some newer autos actually can go 5-10k depending on if its petroleum oil or synthetic. i''ve only had my 85 300CD for a month but have had a 2000 Chevy Silverado for 7 years which I change oil about every 5k. it runs like new and uses only about 1 qt between changes. never had to do any major repairs. what are your thoughts on this guys?
A 617 is a very old design, 5k miles is about all you can go before soot loading becomes an issue.
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  #10  
Old 06-21-2008, 03:06 AM
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603's seem to fare much better with soot loading though.
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George Carlin (Wonder where he is now..)

1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won.

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  #11  
Old 06-21-2008, 11:04 AM
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Yeah, they are a newer design. You can go 10k miles with a good oil in a 603, and even more in a 606. MB specs 13k in the CDI's which is probably conservative.

With a 617 as Brian found out anything more than 5k is pushing it.

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