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Depends on how new the chip is. Supposedly the new (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Bill R. on October 24, 2000 at 14:31:06:

In Reply to: Drove my Dinan chipped 525i w/ 87 octane (more) posted by Chris B on October 24, 2000 at 03:38:21:

er dinan chips are remapped to alter timing advance at all throttle settings just like the Jim
C chips. Even so it unlikely you did any damage. Probably removed some of the carbon on your pistons.

After getting back from out of town, I found that my 1990 525i was driving kind of sluggishly. Something just felt wrong with it. I had just changed the timing belt and all the drive belts the week before and was afraid that i may have screwed something up. When I went to the pump to fill up I realized that I had lent my car to my cousin without telling him it takes only premium. After calling him I found out that he has filled up with 87 octane gas. I have drive a full tank of this. Do I have anything to worry about? Could I have messed something up? After changing over to premium all was back to normal, but I am afraid I might have damaged my engine.

Chris B
1990 525i

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