I just recently bought a bottle of Red Line 85+ from the Parts Shop, and would like to know how much to use. The side of the bottle is marked in ounces, but the label doesn't mention how many ounces to use. The label does say for a "cleaning dose" use 12 oz. (whole bottle), but it doesn't list how much to add at each fill up. I thought I read here that some people add an ounce or so at each fill up. I don't need to use it as a "cleaner", since I also bought a bottle of Lubro Moly injector cleaner. Any tips would be appreciated.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member

I believe that what you have and the DFC that I use are the same thing. I put in 4 oz at every fill-up.

Herb
'82 240D
114,000 miles

I use half the bottle every time I fill up the tank.

Greetings Rick,

When using 85+ I have gotten good results by either using 3-4 onces per fill-up just as a maintainer of cetane. I use the diesel purge every 15000 after the valve adjustment.

Charles

I cut down to 1/4 bottle per tank, and it simply wasn't enough-motor began to run just a bit louder. I threw in another 1/4 bottle, and all's relatively quiet again. So, going forward it gets 1/2 bottle per 17 gal. tank.

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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo

What is the difference between 85+ and Disel Fuel Catalyst

Same-O. 1/2 bottle every fillup.

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Frank
84 500SEL EURO 101K ( JUST LIKE MY 1ST WIFE. GLAD TO GET RID OF HER! )
85 300D 310K (sold)
90 350SDL 184K sold
83 300D 118K (sold)
88 300E 153k (sold)
93 400E 105K (sold)

Ditto the 3 oz not being quite enough. A half bottle (6 oz)
per fill-up seems to be right.

Mario -

Redline's Diesel Fuel Catalyst has been around quite a while
and is for pre-1985 diesels. 85+ was developed for diesels
after 1984. Apparently something in the original formula
does not get along with the newer models' air pollution equipment.

Wes

[Edited by Wes Bender on 06-30-2001 at 05:12 PM]

I'm going to try higher doses of Redline myself. My mechanic adds a full bottle of 85+ at every oil change, and my tank was below a quarter tank when it went in. When I filled up, I took about 19.5 gallons, and I added about 3 oz of Redline DFC. I notice improved throttle response, and the engine seems to run quieter. I'm going to experiment between a third and a half bottle of DFC at each fillup, or tripling the 1 oz/10 gallon ratio. I'll keep you guys posted on what I notice. Of course, diesel fuel varies a lot by region.

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Bob Roe
Lehigh Valley PA USA
1973 Olds 88, 1972 MB 280SE, 1978 Datsun 280Z, 1971 Ford T-Bird, 1972 Olds 88, 1983 Nissan Sentra, 1985 Sentra, 1973 230.6, 1990 Acura Integra, 1991 Volvo 940GLE wagon, 1983 300SD, 1984 300SD, 1995 Subaru Legacy L wagon, 2002 Mountaineer, 1991 300TE wagon, 2008 Murano, 2007 R320CDI 4Matic 52K, some Hyundai, 2008 BMW 535xi wagon, all gone... currently
2007 Honda Odyssey Touring, 2014 E350 4matic