you really need to watch out when a general compression ratio is placed for fuel octane recomendations. there is really no way that you could run 87 in a car from the 60s with 10-1 and not get a knock factory. for most newer cars even ones like the csvt that have high compression ratios you can run 87...but, it is definitly not recomended. the computer can adjust enough in most cases things such as timing to deal with the fuel. however the car will then be WAY down on power and will not run right. bc of the things adjusted by the computer doing this can actually increase chances of overheating and not all knocking can be corrected. so in other words if you want your car to last stick with the manufacturers rating.
