Sold Out Castrol Mixer Funnel – Sold An un-common item of Castrol memorabilia, the mixer funnel for use with two stroke or UCL oil when re-fuelling to get the correct mixture. Post 1958 style decals, in original condition. Category: Sold Items Related products Redline 2 Gallon Can Read more Top Dog Advertising Matches Read more Bates Motor Tube Patches Tin Read more John Bull Repair Outfit Read more