I and mecanic's men think that it is a good rule to change the spark
plugs every 10K Kms (~6K miles) even if no bad symptoms are.
-- Best Regards, jy.Jean Yves TIXADOU Tel: + 33 1 41 80 42 70 C.I.S.I. D14 Fax: + 33 1 41 80 42 98 3 Rue Le Corbusier SILIC 232 Email: tixadou@tulipe.cisi.fr F-94528 RUNGIS Cedex FRANCE