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Homebrew Seafoam

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
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mecheng
Posts: 1165
Joined: Thu Mar 27, 2014 7:49 pm
Year and Model: 1998 Volvo S70 T5
Location: Ontario, Canada
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Volvo Repair Database Homebrew Seafoam

Post by mecheng » Wed Sep 27, 2017 11:52 am

You can make Seafoam treatment much cheaper than buying it.
This is the reference I used but to simplfy it and give you more info:

Typical Seafoam application is 473mL

Therefore for a 4:2:1 ratio

270 ml Diesel
135 ml Coleman Camping Fuel
68 ml 99% Rubbing alcohol

The Diesel lubricates the fuel pump and valves. The Naphtha (Coleman camping fuel / aka White Gas) is the detergent. The rubbing alcohol removes water in the system (not sure this is vital in all cases).

The idle in my car is very smooth now and it seems a bit more peppy. Make sure you add it to a full tank of gas.

http://hildstrom.com/projects/seafoam/
These users thanked the author mecheng for the post (total 3):
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1998 Volvo S70 T5 - SE - 240km - Sold July 2018
1997 Volvo 850 GLT - 190km
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