Also, AutoRX takes two applications and at least one rinse cycle. The first application takes about 2,500 to 3000 miles. Then a rise cycle of 3,000 miles. Then another application of 2,500 to 3000 miles. You use regualr or 'dino' oil for this. I can't say weather it works or not. This is my first try and I didn't run this engine much before. It was fairly clean on the top of the head, but the oil did have a lot of soot in it.
Tom

The 1981 300D that I had (and getting back soon, YAH!) has bad valve seals. Oil comes through when the engine is cold. Once it is warmed up no oil consumption. Most of my driving is less than 20 miles at a time. With conventional oil I had to add a lot. I switched to 5W40 synthetic. The oil consumption dropped dramatically and the cold start in winter is great. I never had to adjust the idle setting for a high rev. idle. On a 300 mile round trip I could find no evidence of oil consumption. Another perk it the fuel economy gained a bit.

In short even if you engine is old and worn you can likely benefit from synthetic and don't be afraid of using 5w40.

Sorry guys, I meant Mobil Delvac-the jug with the tractor trailer on it.

I shouldn't post when I'm tired

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

Delo 400 or Delvac Super will reduce your blowby by cleaning up the rings and making the seal right.

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99 Gurkha with OM616 IDI turbo

2015 Gurkha with OM616 DI turbo

2014 Rexton W with OM612 VGT

Mobil Delvac 1300 Super is what I use too. Walmart has it in gallon jugs.

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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

http://www.fuelly.com/sig-us/40601.png

I had told my story where my Volvo Diesel had sat 1 year not running and when I got it going I did not notice my Thermostat was opening too soon and keeping the Engine too Cool. I drove it like that for around 6 months. Both, resulting in hazy tailpipe smoke.

I believed I had sticking Carboned up Rings.

I removed the Glow Plugs and put in 1/4 cup of Marvel Mystery Oil and let it soak for almost 5 days and repeated the soak for 3 days or so, (I did change the Oil before driving it.) And, it did free up my Piston Rings resulting in no more Hazy Smoke.

So I do not think he plans to mix it into his Crankcase Oil.

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84 300D, 82 Volvo 244Gl Diesel

Why not use one of the flame arrestors that were found in the old V8's????? I think this would cut down on some blo-by issues....Robert

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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

i fully agree with this comment. blow by is normal on them, and what seems like a lot for these engines really isn't. just be sure to stay on top of filter replacements