Show oil filter saves wear on engine piston rings an interesting test I 1 c conducted 0 by th the e california agricultural experiment sta tion with a view ilow to determining the work dvork done by oil filters teed on motor car engines la Is described in the S A I 1 K journal by A it II hoff man two cars a roadster with de livery body and a conch coach were used the filter benj bypassed on the road ster eter but left to function on tho the coach the principal wearing engine casino parts of both cars were measured and where feasible weighed bhore the test after ench car had been run about miles of approximately equivalent use nse the machines were sent tn in und re measured toe the average wear ia the piston rings as determined by loss of n weight eight was wai twice tivice ta as much the machine without the filter the tha wear on pistons ps tons cylinders crank pins and bearl DRa was waa too slight to justify the drawing of ony any conclusions |