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yes i would if i tryed to stay with 87 octane fuel but buy incressing to 89 or 93 i will be fine and with the engine having egr it will hepl to cool the cylinder temps. the y5 and y8 heads also have a larger valve quench area to help to fight detenation. also with the 10% ethenol in fuel to day it runs a bit cooler helping with that some. the injectors being a bosh ev1 style will help to better mix the air fuel. and if im wrong then i have a big paper wight lol!
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