Quote:
Originally Posted by rsmamg
ive been using 87 on my 03 x5 and after 75k miles, no problems at all.
|
Why?!!!?!?!!
Essentially, you're spending more money at the pump than if you were to just buy 91 gas. Why you ask? because your engine has to retard the ignition timings, the vehicle consumes more fuel, resulting in lower output, increased consumption and lower gas mileage.
How much money are you actually saving? $.10 a gallon? What is that a tank, $1.60? WOW!!