The Minis are on it :-) They're not going to stick their neck out and countermand the manufacturers.
The key thing is the lack of certification. If you use 87 and it burns a piston, you'll end up holding the bag, even if still under warranty.
In the end, compression is the source of pinging/knocking and the ECU can fiddle only so much with the ignition timing to cool things down. It can't change the compression ratio.
The key thing is the lack of certification. If you use 87 and it burns a piston, you'll end up holding the bag, even if still under warranty.
In the end, compression is the source of pinging/knocking and the ECU can fiddle only so much with the ignition timing to cool things down. It can't change the compression ratio.