ORIGINAL: JIMBO D
I think Irvine fuel is 2% castor & 18% oil total Sprink( In their catalogue). Wildcat advertise 80/20 synth/castor with 18% total in their fuel also, but maybe their YS brew is pure synth.
cheers Jim
Formular irvine is 18% "Klotz Supertechniplate". But Klotz dont make a "Supertechniplate". Model technics take normal Klote Techniplate and add castor. Final mix is 20% caster/80% Techniplate to make supertechniplate.
http://www.modeltechnics.com/ingredi...gredients.html gives this definition (took me by surprise when I saw it). Means formula irvine is 14.4% synth, 3.6% castor.
Wildcat YS 20/20 is 20% techniplate, no castor (Wildcat do synth/caster blends called premium and premium extra as you say).
Don't get me wrong, formula irvine is good stuff, but for high performance engines such as YS Saito and West, fully synth is the way to go, assuming you know how to run and tune an engine.