mfg 0 Posted January 16 Report Share Posted January 16 The standard spark plug used in Studebaker Avantis was/is a Champion J-12Y....however, if an Avanti owner wanted to use a 'one step colder' spark plug, Studebaker recommended using Champion ......?...... plugs. 1) J61Y.......2) H8.....3) J9YD.....or.....4) H-14Y Quote Link to post Share on other sites
studegary 0 Posted January 16 Report Share Posted January 16 2 hours ago, mfg said: The standard spark plug used in Studebaker Avantis was/is a Champion J-12Y....however, if an Avanti owner wanted to use a 'one step colder' spark plug, Studebaker recommended using Champion ......?...... plugs. 1) J61Y.......2) H8.....3) J9YD.....or.....4) H-14Y Service Letter J-1063-3a says for one step cold to use J-10Y (formally J-9Y), so I will choose your answer 3. Quote Link to post Share on other sites
mfg 0 Posted January 16 Author Report Share Posted January 16 2 hours ago, studegary said: Service Letter J-1063-3a says for one step cold to use J-10Y (formally J-9Y), so I will choose your answer 3. And you are CORRECT! Quote Link to post Share on other sites
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