Sorry if this has been posted before and I can't find it,
but I need to change the oil soon and I'm wondering if I should be using a different oil now that I have my Pure turbo on and am installing my port injection within the next month.
oil is your choice. Some people stick with whatever the dealers give. And others use amsoil.
In all our builds however, we use Schaeffer Oil products. in the Supra specifically we use Schaeffer Supreme 9000 syn oil with a 5w40 weight. I would definitely bump up the weight of the oil higher than the )w20 stock oil. but thats just me.
Your going to get dozen different recommendations. I changed oil at 2500 to liquid moly. Has great rep with us BMW guys.
100% get away from the recommended water oil that only helps w gas mileage