Gas grade?
#3
Driving RX7's since 1979
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For NA's in stock form at least
Factory recommendation is for regular unleaded. However, running a tank full of Premium once in awhile would be good as the extra detergents will give your injectors a bit of cleaning.
#5
Former Moderator. RIP Icemark.
Basicly stock NA cars have been dyno tested many time with all the verios grades and in most cases there is more HP in using octanes of 89 or 87.
Modified cars or T2 models with the knock sensor however show increased HP using octane 91 or better (if available in your area).
Modified cars or T2 models with the knock sensor however show increased HP using octane 91 or better (if available in your area).
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