Polarine Motor Oil Ad Promises Durable Engine Protection
An old newspaper ad extols Polarine motor oil as sturdy and rich fueling engine bearings. It urges higher driving demand and traffic strain, claiming Polarine provides a protecting cushion of oil for every bearing surface. Replace every 500 miles with the grade suited to your car.
Iso Vis Motor Oil Promises Constant Viscosity
Iso Vis motor oil touted as the sensation of the motoring world maintains constant viscosity under normal driving, resisting thinning and wear. It claims protection for every mile and extended crankcase intervals, with drivers reportedly going 1000 miles or more between changes.
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