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#1
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300SDL oil change interval on Rotella T5
I guess the title says most all of it, I had been changing at 4000 on the standard diesel dino. Thursday I’m embarking on a 2000 mile round-trip. I put in Rotella T5 15/40 3400 miles ago. Not sure if 5400 miles is an acceptable interval.
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1986 300SDL, 362K 1984 300D, 138K |
#2
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It's cheap oil. I'd change it every 3k. Mobile 5w40 is awesome for these cars.
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Only diesels in this driveway. 2005 E320 CDI 243k Black/Black 2008 Chevy 3500HD Duramax 340k 2004 Chevy 2500HD Duramax 220k |
#3
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I don't think a road trip is as hard on engine and oil at the jotting about town with a lot of stop and go. Anyway, I almost never go further than 25 miles so I change the 617's oil ever 3000.
If you change it now you won't have to change it when you get home.
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84 300SD 85 380SE 83 528e 95 318ic |
#4
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Isn't T5 a synthetic blend? If so, you should be able to do 5K without any worries. I'm sure lots of folks have gone longer on worse oils and their cars lived to tell the tale.
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Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
#5
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Unless the oil has seen almost all city/idling/short trips (less efficient driving conditions) I'd run it. I've put T5 in a couple engines and it seemed to perform very well.
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'82 300CD "Pearl", the very first turbo diesel 123 coupe Totaled 11/23/18, rebuild in progress. '85 300TD, "Artemis". '78 300D euro, "Ol' Red", mostly retired. '85 300D, "Gandalf". |
#6
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Thanks for the feedback. T5 is a synthetic blend, this is my first time using it, O'Reilleys has it on specials for about the same as dino. About half of my driving is freeway commuting. And, not scientific, it looks lighter at this point than did the dino.
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1986 300SDL, 362K 1984 300D, 138K |
#7
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7500 miles.
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CENSORED due to not family friendly words |
#8
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Never change your oil, even synthetic, at 7500 miles in a 30+ year old diesel. Use quality dyno/synethetic 15w40 and change every 3k miles. When the car was brand new in 1980's, and the engine was new, it was okay to follow this recommended service interval 5000miles+. These engines are decades old and have hundred's of thousands of miles on them.
Doing an oil change is the most inexpensive maintenance item you can do, do it early, use quality parts, and have peace of mind.
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1976 Mercedes 240D (Sold) 1985 Mercedes 300D Turbo Diesel: 500,000KM 1986 Mercedes 300E (Sold) 1988 Mercedes 300E (Sold) 2002 Mercedes C240 (Sold) 2008 Mercedes C350 4matic A great site for purchasing industrial rubber products! Industrial Rubber |
#9
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Quote:
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'82 300CD "Pearl", the very first turbo diesel 123 coupe Totaled 11/23/18, rebuild in progress. '85 300TD, "Artemis". '78 300D euro, "Ol' Red", mostly retired. '85 300D, "Gandalf". |
#10
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The main concern here is protection of the piston rings. I don't agree with everything Kent says or recommends but he is 100% with recommending an oil change at 3000miles MAX.
Yes we've come a long way in oil chemistry and such but these engines have hundreds of thousands of miles and are 30+ years old. Change your oil every 3000miles or 5000KM. https://www.youtube.com/watch?v=y4VqcghARzg
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1976 Mercedes 240D (Sold) 1985 Mercedes 300D Turbo Diesel: 500,000KM 1986 Mercedes 300E (Sold) 1988 Mercedes 300E (Sold) 2002 Mercedes C240 (Sold) 2008 Mercedes C350 4matic A great site for purchasing industrial rubber products! Industrial Rubber |
#11
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I usually do between 3000-3500. Oil and filters are cheap.
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'80 300SD - '83 240D - '00 E55 AMG - '02 G500 |
#12
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Quote:
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CENSORED due to not family friendly words |
#13
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Very nice I do the same. There's nothing less expensive then a quality oil change and filter. It's shocking some people run their oil changes to 10k with blown heads. Some people have absolutely no respect for their Mercedes-Benz. Why not fix the head if it's broken and continue to drive on it?
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1976 Mercedes 240D (Sold) 1985 Mercedes 300D Turbo Diesel: 500,000KM 1986 Mercedes 300E (Sold) 1988 Mercedes 300E (Sold) 2002 Mercedes C240 (Sold) 2008 Mercedes C350 4matic A great site for purchasing industrial rubber products! Industrial Rubber Last edited by marco5; 05-16-2018 at 10:05 PM. |
#14
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Quote:
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CENSORED due to not family friendly words |
#15
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Quote:
Claiming someone with an OM603 is abusing their engine because of a cracked head is absolutely ridiculous. The early 603's with the #14 head casting are prone to cracking, even if maintained by the book and with your anal-retentive style of maintenance flushing money down the toilet all the time. Before claiming people don't respect their cars, learn to respect your other forum members instead of spreading FUD and misinformation.
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Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
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