Quote:
Originally Posted by Zhangy
all engines must be designed to run on 87 octane, 2L boxer engine is no different. using 87 octane will do no harm, because it's the rule. The manual says a lot of things to lower the liability of the manufacturer such as touchless wash only, wash after driven on salty road every time, don't mod your car... you get the point
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Quote:
Originally Posted by Zhangy
unfortunately this is true, it will go on 87, heck put in 85 and it will still go.
Just ask yourself which petrol engine in the world does not run on 87??
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You have a total misunderstanding of something. There is no "rule" that they "must be able" to run on 87.
The manual does not say 91 minimum for "liability" reasons.
These are very high compression engines and need the knock resistance provided by higher octane fuel. This is not a matter of opinion or speculation but an engineering fact.
There are many older high compression engines that if you try to run 87 through them they will destroy themselves is no time since they do not have the ability to detect knock and adjust for it.
Being "able" to run on it and
should be run on it are not the same thing.
You still have not provided the requested proof that there is a rule that engines must be designed to run on 87.