Find many great new & used options and get the best deals for Holley 26-137 Adjustable Secondary Idle Lever at the best online prices at eBay! That work continues today through Holleys EFI products as well as through Holleys family of brands. Use with standard pump only - not recommended for maximum pressure pumps. Typically there are "winter" and "summer" blends with different vapor pressures to promote atomization at cold temps and to discourage vapor lock at hot temps. Never tried it with my old Model A Ford but I heard that they will actually run on Kerosene.. Sorry, you're using a web browser that is no longer supported. In answer to Rusty's comment about adding anti freeze to water, the difference is that water is only one material, H2O, with a single boiling point (varied only by pressure). All kinds of remedies were tried. Post in the forum instead. It is as said - of the "paint thinner" family in weight with ehtyl acetate blended in to make it's solvency properties a little "hotter " and stronger. From that time on octane ratings slowly rose, helped by the addition of more and more tetraethyl lead. [endif]-->. [endif]--> http://www.bp.com/liveassets/bp_internet/retail/retail_australia/STAGING/local_assets/downloads_pdfs/f/FN_modern_petro_vintage_engines.pdf,