Hello everyone, I just picked this baby up yesterday! 3 hour drive home and it was cool. It does need a tune up so I wanted to know what is best for the I6 engines? - Synthetic oil or standard? - Best oil filter? - best spark plugs? - best or good plug cables? Thanks for the help! 1st classic Mustang owner! I'm excited. It has a 9 inch rear already and it has been converted to 5 lug and the front suspension has been upgraded. Just needs new leaf springs, front springs and lower linkages for a full V8 conversion.