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Old 06-09-2018, 11:03 PM   #1
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DT466 Synthetic Oil recommendation?

Hey all, we're getting ready for our first oil change and there's a giant sticker under the hood, from the school district, that say's SYNTHETIC OIL ONLY. Ok, I can take a hint!


Question is, which synthetic oil? From what I gather it needs to be diesel rated oil. I found some Schaeffer 5W-40 on Amazon in a 5gal pail. I had thought 15W-40 would be better, but I'm having a hard time finding that weight in a synthetic.
I supposed I'd need 2 pails though, as (according to the manual) the capacity is 28 quarts. I'd be fine with having a couple/few gallons on hand for when it's necessary.


I've got a school bus mechanic coming over next week to walk me through some stuff, oil change being one of the things. I'd like to have oil on hand at the time.....just not sure which oil to get. Is Schaeffer a quality oil?



Any suggestions/words of wisdom?



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Old 06-10-2018, 12:19 AM   #2
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Drew Bru,

Depending on the milage you plan on driving and the temperature you will be driving in you may or may not need synthetic oil. The engine would be fine with conventional oil unless its being operated frequently in the cold (air temp less than around 30 F) or hot air temp (over around 90 F). There should be oil grade vs air temp charts for you engine. Synthetic oil provides better consistacy of viscosity over large temperature ranges. Synthetic oils also allow longer periods between oil changes because the oil doesn't break down as quickly as conventional. If your not operating in extreme temperatures or puting on high milage I would use conventional 15w40 oil and change it more frequently. If you want to use the synthetic a 5w40 would be fine. The schaffer should be fine. For oil purchase I would locate a local bulk oil supplier to purchase your 5 gal buckets. They should be cheaper than amazon as they usually fill the buckets on-site out of their bulk tanks. Popular diesel oils are Shell Rotella, Chevron Delo and Mobile Delvac.

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Old 06-10-2018, 08:34 AM   #3
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Drew Bru,

Depending on the milage you plan on driving and the temperature you will be driving in you may or may not need synthetic oil. The engine would be fine with conventional oil unless its being operated frequently in the cold (air temp less than around 30 F) or hot air temp (over around 90 F). There should be oil grade vs air temp charts for you engine. Synthetic oil provides better consistacy of viscosity over large temperature ranges. Synthetic oils also allow longer periods between oil changes because the oil doesn't break down as quickly as conventional. If your not operating in extreme temperatures or puting on high milage I would use conventional 15w40 oil and change it more frequently. If you want to use the synthetic a 5w40 would be fine. The schaffer should be fine. For oil purchase I would locate a local bulk oil supplier to purchase your 5 gal buckets. They should be cheaper than amazon as they usually fill the buckets on-site out of their bulk tanks. Popular diesel oils are Shell Rotella, Chevron Delo and Mobile Delvac.

Ted

Thanks Ted! We plan on full-timing around the country, so I'll probably stick with synthetic oil....that's also what the mechanic at the local bus barn recommended. We have no real clue about what temp extremes we'll encounter, but I really like the fact that we can wait a little longer between oil changes. I wasn't even aware of the existence of bulk-oil suppliers, but we live outside of Chicago so they're probably not too difficult to find. There's a lot of trucking companies and repair shops around here!


In theory this seems as easy as changing the oil in my compact car.....but some things (like finding bulk oil suppliers, and having to use a giant filter wrench and 5-gal buckets to drain the oil) let you know that it's a whole different beast. Everything's just.......bigger. At least there's a lot more room under the hood!
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Old 06-10-2018, 08:38 AM   #4
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You'll likely need more than a 5 gallon bucket.
I change my own oil on DT466's you're looking at about 6-7 gallons.

I do the oil and filter for about $40 but I don't run the fancy stuff.
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Old 06-10-2018, 08:47 AM   #5
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You'll likely need more than a 5 gallon bucket.
I change my own oil on DT466's you're looking at about 6-7 gallons.

I do the oil and filter for about $40 but I don't run the fancy stuff.



Yup, I've got 2 buckets at the ready. I'm expecting 7 gals, but I've never done this before so whaddo I know?
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Old 06-10-2018, 09:04 AM   #6
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Yup, I've got 2 buckets at the ready. I'm expecting 7 gals, but I've never done this before so whaddo I know?
how do you plan to swap buckets while a stream of hot oil the diameter of a half dollar is flowing?
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Old 06-10-2018, 09:17 AM   #7
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how do you plan to swap buckets while a stream of hot oil the diameter of a half dollar is flowing?

I like to think I've got lightning-fast reflexes and asbestos-like skin, but honestly, I have no idea. I usually end up with some puddles on the floor without having to swap vessels . I think I've got a 10gal. Rubbermaid tote too.

I've got a mechanic from the bus barn that's going to walk me through the oil change, but I'm definitely open to suggestions if you've got any?
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Old 06-10-2018, 09:54 AM   #8
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I dig a hole, put a big trash bag in as a liner, then a 7 gallon bucket. I drive over the hole, and then drain the oil into the bucket.
It comes out fast and furious!
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Old 06-10-2018, 10:13 AM   #9
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I dig a hole, put a big trash bag in as a liner, then a 7 gallon bucket. I drive over the hole, and then drain the oil into the bucket.
It comes out fast and furious!

That's funny, just before I checked the thread I says to myself, I says "What about digging a big pit under the engine?" Great minds think alike! Alas, the storage yard where the bus is will probably have a problem with that. It looks like I'll need a low-ish profile vessel too....at least according to the video I just watched. How much room is there to work under the oil pan?
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Old 06-10-2018, 10:32 AM   #10
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That's funny, just before I checked the thread I says to myself, I says "What about digging a big pit under the engine?" Great minds think alike! Alas, the storage yard where the bus is will probably have a problem with that. It looks like I'll need a low-ish profile vessel too....at least according to the video I just watched. How much room is there to work under the oil pan?
Plenty of room under the pan.
I also have a 7 gallon oil pan from Rural King I use when I'm in town. Fits nicely under there.

This may start a flame war, but I feel its worth mentioning anyhow-
Don't run Fram filters. Run Wix or Napa (made by wix).
And if you're going to run expensive stuff may as well go with this-
https://www.amsoil.com/shop/by-produ...?code=DMEQT-EA
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