My mechanic said I should put a quart of Marvel Mystery Oil in the crankcase oil with my next change.. he said its excellent in the diesel engine and does wonders .. is he trying to sell me sanke oil treatment?

1990-1922 2.5 turbo diesel engines

__________________
1994 S-350 6cyl Turbo Diesel 158k

1998 300d 6 cyl Turbo Diesel 143K

1993 2.5 124 Turbo-Diesel 236

1990 2.5 124 Turbo-Diesel 228k

1983 SL-500 EURO W/HEATED SEATS 40K

SOLD 1977 Jaguar XJ6 Coupe Antique Roadster 85K

SOLD 1993 2.6 6 cyl 190 E 150k

SOLD 1992 2.5 124 Turbo-Diesel 204k

RIP 1992 124 300 TD 265K OIL PUMP QUIT @ 85MPH

I would change and use Mobil Delvac, forget the Mystery Oil...

__________________
2000 Ford 7.3 Powerstroke 4x4
2006 Mazda Tribute
1983 Black 300 D (donated to charity)
1993 Teal 300 D (160K) Sold
"I love the smell of burnt diesel fuel in the morning, it smells like ....VICTORY"

Semper Fidelis
USMC 1973-1976

Don;t know about diesel's. But I use Mystery Oil in my 94 E500 and so does run.exe (Scott), and we are both happy.

This stuff has great press and a cult following... I do not know about the claims of " top end lubrication"... never could understand it...
I use the Air tool Marvel oil for air tools...

I have a metalic rap in my engine and a Mercedes tech
recommended Marvel Mystery oil in the crankcase. He said it is
amazing how much varnish and shellac builds up. I put some in
and the noise seems to be a little softer. Haven't driven far yet.

Better cure for noisy lifters in a 60x engine is to replace the two little o-rings on the center shaft of the oil filter cover. They are not it in new filter box for some reason, and when they get old and hard, they leak, reducing pressure in the lifter gallery. It leaks down overnight, so that the tappets are "flat" the next morning. Can take quite a while to pump up.

Marvel is a high detergent solvent mix, it will remove varnish and sludge, but you won't have any if you are either changing dino oil every 3000 miles or using synthetics. I strongly recommend one or the other -- both the old Chevy vans at work have more than 300000 miles on them, with no engine work! Oil is changed at Speedy Oiler every 3000 miles.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!

psfred: I agree with what you say however in my case due to
unusual circumstances I am only able to drive the car to the
store and back[about 1 to 2 miles] And this AM I noticed a
definite improvement in the metalic rap due to using Marvel
Mystery oil.

I used to use Marvel in a '55 (yes five five) Plymouth. It wouldn't run good without it.

Never tried it in my Diesels, they run good without it.

P E H

Well,, this does seem to add up... proper hydraulic lifter action can sure be affected by varnish build up... so if this is good at dissolving that then it would be felt in the seat of the pants....

PEH, Did you use it in any '05 (yes oh five ) automobiles ? You were probably still driving them in '54 (yes five four) when you bought that new '55 (yes five five).

Leather,

That's zero five. Don't know a ZERO (numerical character) from an OH (alphabetic character) ?

And the '55 Plymouth was 7 years old when I bought it, not new.

P E H

TXBill,

I bought some new food last week, does that count?

P E H

I thought maybe you splurged just once in your life celebrating coaxing 57 years out of that other car.... What was I thinking ?
I should have used zeroh, that covers both of them.

TXXBill.

How come you sold or got rid of all those MBs? I still have my first one.

Volvo substitute? I don't think its quailfied.

P E H

Leather,

Your arithmetic escapes me: 57 years?