12.5 on 98 octane? sounds high!

no one will have a definite answer as reliability is very difficult to measure/define

i though 10.5 was a general rule of thumb max comp for reliable motor, maybe injection allows it to be a little higher

letting us know what gear you have and what you are using it for helps us determine what is good for that situation, or what you could do instead, also an idea of if your willing to put money in to it

if its just a knock about i say turbo it!