Need a little container for draining a Racor? Red Solo Cups and diesel fuel do not mix well.

Red Solo Cups and Diesel

File this one under OOPS. Yesterday Dave went to drain the Racor filter and grabbed a red Solo cup to do so.

Great; it was the perfect size to fit the space in the engine compartment. He even made a comment about how much easier it was than the bottle he’d used the previous time.

After draining the Racor (mostly diesel fuel), Dave set the cup down in a drink holder while he put things back together in the engine compartment.

Five minutes later he spotted diesel fuel on the cockpit floor. Tracing it back, he found that the diesel had eaten holes in the bottom of the cup.

Red Solo Cups and Diesel Fuel Don't Play Nice Together: Need a little container for draining a Racor fuel filter? Don't use a red Solo cup!

We won’t make that mistake again.

The Solo cups have a recycling number 6 stamped in the bottom, I assume that any cups with a number six would be a problem. In a quick Google search, it turns out that #6 plastics are styrofoam and its relatives (polystyrene).

Hmm, I knew that styrofoam melted easily with many chemicals, I just didn’t realize that red Solo cups were made from “styrofoam.”

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  • Scott Lee
    Posted at 27 March 2015 Reply

    I once put the fluid from our compass into a water bottle for temporary storage. Didn’t hurt he bottle any but while it was sitting there somebody picked it up by accident and took a drink!

  • Jennifer Dormann Moore
    Posted at 27 March 2015 Reply

    We put gasoline in a solo cup once… Oops!

  • MIke O'Quin
    Posted at 27 March 2015 Reply

    Use a plastic milk jug. Made of HDPE, same stuff as the plastic car bumpers and in my case my water tank.

    • Carolyn Shearlock
      Posted at 27 March 2015 Reply

      Mike, no way is there room in the engine compartment under the Racor drain for a plastic milk jug. This was what he was draining the Racor into until he could transfer it into something “better” (such as a milk or water jug) to take it to the recycling center.

  • Don Koch
    Posted at 27 March 2015 Reply

    If my memory serves me well, number six is PS, or polystyrene. So called styrofoam is EPS or expanded polystyrene. Cheap but not impervious to petrochemicals and oils.

  • Joe Sprouse
    Posted at 27 March 2015 Reply

    water bottles work, mixer bottles like tonic water etc also work. We have a pocket that holds several mixer bottles of diesel for filter changes.

  • Dave Skolnick
    Posted at 28 March 2015 Reply

    Empty quart lube oil containers…

  • Mike Boyd
    Posted at 28 March 2015 Reply

    I find that containers with recycling numbers 2, 4, and 5 work for most things. 2 and 4 are High and Low density polyethylene and 5 is polypropylene. Those “semi-disposable” food containers they make now are usually one of those and I’ve found handy to have around outside the galley.

    Be glad it was only diesel and not something like gel coat or your mess could have been much worse.


  • Gimme Shelter
    Posted at 31 March 2015 Reply

    Holy crap! Good to know.

    Incidentally, last time I was in France one of my co-workers asked me, “Do all American parties really have red cups?”

    • Claire Ford
      Posted at 31 March 2015 Reply

      Gimme Shelter, that quote had me laughing. It’s like everybody thinks we ride horses here in Texas.

  • Chuck D
    Posted at 02 April 2015 Reply

    Your timing is incredible – as always. I’m changing my fuel filters today! Thank you!

  • Red Canoe
    Posted at 28 March 2016 Reply

    one red solo cup filled with gas from a jerrycan by the bikes by the trees and carried to stoke up the wet fire resulted in a flame that went from the throw point up the arm then trailed back to the trees, jerrycans and bikes. makes me laugh now but seeing my guy at the time go up in flames well…lesson learned

  • Edward Popka
    Posted at 28 March 2016 Reply

    Need to ad rum and chug-a-lug it!

  • Colin Mombourquette
    Posted at 28 March 2016 Reply

    Made the red cup mistake when bleeding the fuel line last year – can be quite messy.

  • Marty Besant
    Posted at 06 December 2016 Reply

    Use #1 PETE or #2 HDPE. Polyethylene is what your diesel or gas can is made of. #6 PS styrene is what models are made of. That is why airplane glue makes them stick together for assembly. It dissolves and the after the solvent evaporates, it rehardens

  • Steve Klitzky
    Posted at 07 December 2016 Reply

    Once used one to clean the winch parts. Left it overnight and the plastic was melted onto the parts. ugg

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