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Which grade gasoline to use? 700 1989

posted by  someone claiming to be Greg on  Wed Nov 7 04:12 CST 2001 [RELATED]

I am getting mixed responses on which gasoline to use in my 1989 740GL. Some people say that I should just use the regular, 87 octane gasoline. The car runs fine, but only gets about 20 MPG. Others say I need to use premium, 91 octane, the car runs better, and gets about 22-23 MPG.

The owner's manual says to use 89 octane or higher. So, what is the board's consensus on the matter? Normally I am prone to follow the manufacturer's instructions, but I am unclear in this case. Is there any harm in using 87 octane? What do others do?

Thanks,

Greg

1989 740GL





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New Which grade gasoline to use? [700][1989]
posted by  someone claiming to be Greg  on Wed Nov 7 04:12 CST 2001 >


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