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Fuel octane advice for a 240DL 200 1990

posted by  Gypsy 2 on  Wed Oct 25 03:46 CST 2006
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I have a 1990 240DL five on the floor sedan and I have a question concerning fuel octane. My manual states that Volvo recommends the use of an unleaded premium gasoline with an (R+M)/2 rating of 91. The car has 152,000 plus miles on it all while using premium gas. Can I safely use an octane rating of 87 or 89? I have tried 87 and I am currently trying 89 with no noticeable spark knock or performance problems. The service man that services my 240, he is a former volvo dealership mechanic, says that he has never used premium in any of his Volvos. He has always used regular. Also, could there be damage going on from the gas if there is no knocking or performance lag? In my area there is a difference of twenty cents between 87 octane and 93, and a difference of ten cents between 87 octane and 89.

Thanks CJ Hill






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New Fuel octane advice for a 240DL [200][1990]
posted by  Gypsy 2  on Wed Oct 25 03:46 CST 2006 >


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