Question:
What kind of fire extinguishers do you use in your shop? I went to the fire extinguisher service place to get some advice on upgrading the fire extinguishers to deal with 102 octane race fuel. I got a serious earfull. Things that went against what I thought I knew or did know and ignored: -CO2 is not used much, gives a quick snuff out of fire but reignition is a big issue -dry chemical ABC rated has ammonimum phosphate which melts on the surface of wood and paper to avoid reignition but also is highly corrosive to aluminum and electronics. -you can get dry chemical rated only BC which is supposedly better for engine and shop fires So I'm thinking of swapping out the ABC rated extinguishers in the garage and replacing with BC rated. Then move the ABC rated ones to the wood shop to sit along side an old fashioned pressurized water unit.

Answer: A co2 unit is what I have for a first response to a fire. The biggest unit I can carry. It leaves no mess and will put out a fire if it is not too big. This was always the one of choice for engine fires in aircraft. The abc powder units will put out a fire better but they leave an awful corosive mess that is very hard to clean up. I would only use that as a backup for the CO2 unit but have both available.