Honestly 76 and Chevron are considered the best but Costco is fine. Shell is the only one that is particularly warned against by a fair amount of tuners. It been posted in other platforms as well. This is not just some random thing. Its been being talked about by tuners for several years now. It might be the whole Nitrogen thing . I do think it has more to do with upgraded turbo’s than stock.
I do not have the absolute specifics, but like usual on this forum there is a tendacy by some to doubt everything and shoot the messenger.
I do not have the absolute specifics, but like usual on this forum there is a tendacy by some to doubt everything and shoot the messenger.
I'll just keep using the Chevron.
Thanks brother