can regular octane, we have 87 here in Pocatello not 89 and then it jumps to premium grade 92 be used in a 2005 deville?
Can 87 octane gas be used in a 2005 Cadillac Deville? Also, I have read that maintenance costs on cadillacs are high, true?
60% of owners use 87 to date, high costs? yes the engine is good and bad . bad for the average who doesn't know how to handle this aluminum design pertaining to proper oil ,coolant and other fluids and changes on schedule
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