Page 7 Advertisements Column 3

Evening Star, Issue 20130, 21 March 1929, Page 7

Don't be satisfied with an ordinary polish. “ Radium ” Polishes for Bools, Ploors, <iiiJ Metals are Quality polishes.—[Advt.]

appotenic the quality in Plume that keeps ijoar poweir&om ** Frbtn ad flap) added lo; and polettsf meaning powerful . 'appotenic: ‘possessing _ increased poweri haid of a gas that, being stable to heal and high compression, will therefore netthe audibly not in lajiigh compression engine* VY\> But, what causes power to peter out when, taking a hill ‘in top' 1 out ie v . 1 e> * ri \ m mm. u The Pull of Gravity!—and the use of a Motor Spirit that can't stand up to the strain. It is then that the heat and high compression cause Motor Spirits unable to resist these disruptive influences,to knock—audibly and'sometimes silently. Result —the petering out of power, Motorists using Plume, the appotenic Motor Spirit, find theyUiave at reserve of power —heat-resistant; power, to counter the pull of gtavitVi and its knock-producing effect* • • • • • •« Plume welcomes heat I and highf compression * . * .Jburns eyenly with,, a gratifying absence <bf stnd of petering our of power* No motorist. can help appreciating 'that? little extra lift of power on the hills--* the steep hills —where he needs* it most! o air—rnmS Plume, the appotenic Motor Spirit, being stable to heat and high compression . burns evenly and! steadily when the charge ignites. Expansion follows this correctly-tlmedf combustion in a steady surge of power that pushes the'piston down throughout the length of its power stroke. km m m ’ > 5l In. c^ 3 I it i as*t spv^ 9r The a m #/ <r Incorrect combustion follows the use of a Motor Spirit that lacks stability to heat.\ A chemical change takes place in the charge shortly after the instant of ignition. ,Flames rip through the unignited portion of the charge, causing either audible or silent knocking, and •Us propulsive power in violent, spasmodic expansion which the piston cannot absorb. The appotenic Motor. Spirit Try avtfank full prove it for. yourself. VACUUM OIL COMPANY PT Y. LTD, N or/51<>r^Seri€S>