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  #1  
Old 08-08-2011, 02:31 PM
sjh sjh is offline
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Safe, I hope, Oil Question

1990 300D 2.5L Turbo.

I live in the SF Bay area.

Temperature range is 40 F to 100F.

What weight (5W-30, 20W-50, etc) do I use?

Thanks.

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  #2  
Old 08-08-2011, 02:34 PM
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Isn't there a page in the owner's manual dedicated to this?
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Old 08-08-2011, 02:34 PM
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15w40 or 5w40 would work well. 5W30 will be too thin, and most commonly available 5/30s are not diesel rated.

-J
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1991 350SDL. 230,000 miles (new motor @ 150,000).

Tesla Model 3. 136,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.
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  #4  
Old 08-08-2011, 02:37 PM
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There is a page in the owner's manual that addresses this question. As far as types of oil, I am going with Amsoil 10W40 Premium Synthetic Oil with boosted levels of ZDDP for extra lubrication. However, I also believe that the Lubromoly oils (available at NAPA) are on par with Amsoil, both are amongst the top five performing oils.
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  #5  
Old 08-08-2011, 02:45 PM
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If you guys thing there are oil wars here you should hop on over to TDIClub. Numerous tests have shown Rotella T6 5w40 to be an excellent oil, and a value that is hard to beat. It's an easy recommendation for me to make.

http://forums.tdiclub.com/showthread.php?t=325214

-J
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1991 350SDL. 230,000 miles (new motor @ 150,000).

Tesla Model 3. 136,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.
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  #6  
Old 08-08-2011, 03:44 PM
sjh sjh is offline
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Quote:
Originally Posted by Matt L View Post
Isn't there a page in the owner's manual dedicated to this?
Of course - but things have changed in 20+ years.

Or maybe they haven't.

PS - I got 400K running Castrol (mineral) 20-50 on my prior car but then I come here and I encounter a wide variety of thought.

So I asked.
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  #7  
Old 08-08-2011, 03:46 PM
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They didn't have Rotella T6 back then.

I'm going to have start looking for that stuff. 5W-40 is just what I need.
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Old 08-08-2011, 04:02 PM
sjh sjh is offline
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Quote:
Originally Posted by Matt L View Post
They didn't have Rotella T6 back then.

I'm going to have start looking for that stuff. 5W-40 is just what I need.
So it seems like a good question for me to ask.
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  #9  
Old 08-08-2011, 04:07 PM
sjh sjh is offline
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Quote:
Originally Posted by compu_85 View Post
If you guys thing there are oil wars here you should hop on over to TDIClub. Numerous tests have shown Rotella T6 5w40 to be an excellent oil, and a value that is hard to beat. It's an easy recommendation for me to make.

http://forums.tdiclub.com/showthread.php?t=325214

-J
Any advice which stores for purchase?
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  #10  
Old 08-08-2011, 04:13 PM
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Mau Mart and AutoZoo have it.

-J
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1991 350SDL. 230,000 miles (new motor @ 150,000).

Tesla Model 3. 136,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.
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  #11  
Old 08-08-2011, 04:22 PM
sjh sjh is offline
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Quote:
Originally Posted by compu_85 View Post
Mau Mart and AutoZoo have it.

-J
I call my local WalMart and ask but no one answers the phone?

I'm buying them locally at $28/gallon.

How terrible is that?
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  #12  
Old 08-08-2011, 04:39 PM
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Quote:
Originally Posted by compu_85 View Post
If you guys thing there are oil wars here you should hop on over to TDIClub. Numerous tests have shown Rotella T6 5w40 to be an excellent oil
For OM617.952s, however?

I can't get my head around whether 5w40 oils are ok or not for the older motors.
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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
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Old 08-08-2011, 04:40 PM
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Quote:
Originally Posted by sjh View Post
I call my local WalMart and ask but no one answers the phone?
And this would be surprising, why ?
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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
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  #14  
Old 08-08-2011, 05:09 PM
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Yes oil rated 5 40 is good for any diesel as long as it is Diesel rated. I really like Mobil 1 Light truck and SUV Diesel in 5/40 for my 300D. I use it all year, great for hot weather on the 40 side, great for cold starts on the 5 side. I have never had trouble starting my 300D since I began using it about 4 years ago.
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