For the oil thickening, you don’t have to mix anything, pour anything into a running engine or jump through any hoops. A can of straight 30W motor oil is the same price as any other quart of oil. Two quarts will thicken the mix even more. Don’t work harder or expensiver; work smarter. If you have the CVCC engine; mine did well on five quarts of 30W and got 36 MPG highway. 1.8 engine in an 82 Accordion.