I have an old classic garage kept 40 yr old Mercedes 280 SEL 4.5. I only drive it about 2-5 times a month. Could I still use my 10-15 yr. Old lead substitute I still have in stock to add to the gasoline until I buy newer bottles later this year. Please advise. Many thanks, Bill
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Tuesday, May 27th, 2014 AT 12:55 PM