450SL Oil & Coolant

1971-1989: 280SL, 280SLC, 300SL, 350SL, 350SLC, 380SL, 380SLC, 420SL, 450SL, 450SLC, 450SLC 5.0, 500SL, 500SLC, 560SL
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450SL Oil & Coolant

Post by Panzerwagen » Sat 20 May, 2017 4:17 pm

Hello all.

Which engine oil viscosity is most suitable for an early 450SL? Also, is there a particularly well-suited brand for this model's engine?

Many thanks.
Last edited by Panzerwagen on Sun 28 May, 2017 5:58 pm, edited 1 time in total.

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Re: 450SL Oil

Post by CraigB » Sat 20 May, 2017 5:06 pm

20w50 I think. I've followed the school of thought that better to change oil than pay more for oil that lasts longer. Plenty of examples of long engine life just on normal oil. But might get some opposing opinions and from people who may know better than me. I've been getting 20l drums of Penrite on special from supercheap at a good price, but that might have been a promotional period.
Craig Baulderstone

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Re: 450SL Oil

Post by edenning » Sun 21 May, 2017 9:44 am

Yes, I would second that. I use Penrite HPR 30 Mineral oil, my neighbour who was a mechanic and then worked for Penrite years ago swears by their products. I get mine from Repco. cheers

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Re: 450SL Oil

Post by T-Modell » Sun 21 May, 2017 3:58 pm

you can be lucky to not ask that question in a German forum ... you would have around 100 posts in half a day :laughing6: ... here in the land of "I know better", there are two fractions: No 1 says "use the oil of those times" and No 2 says "Oil quality has developed, so use a high performance oil of today".

Of course both fractions are 100% sure, they're right. How do I do it? I put in "cheap" 10W40 and it works fine for the R107 and the W111 ...

Best regards
1967 W111 250SE Cabriolet, horizon blue
1973 W115 220D 5.0 Pick-Up Argentina, work in progress 2017/18/19
1986 R107 500SL, arctic white, the midlife crisis viagra replacement
2007 R171 SLK350, calcit white
2008 S211 E63T, calcit white, sleeper

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Re: 450SL Oil

Post by Panzerwagen » Mon 22 May, 2017 9:43 pm

Thanks gentlemen.

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Re: 450SL Oil & Coolant

Post by Panzerwagen » Sun 28 May, 2017 6:03 pm

Rather than start another thread, I hope to receive some more advice here, regarding which coolant is suitable for the above model (any particular colour?). If anyone shares their thoughts, it would be kindly appreciated.

Thanks again for your replies.

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Re: 450SL Oil & Coolant

Post by Bartman4800 » Mon 29 May, 2017 10:08 am

This has been covered a zillion times on this forum, do a quick search.

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1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

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