hi everyone! as far as gas goes my manual says premium.. but i have been told lower grades are ok too! what should i be filling up with?
Have not tried it with my FJ but with my '89 Four Runner it was cheaper to buy the 91 cuz I got that much better mileage than with the 87 octane.You can run regular or premium. Powerwise, it makes very little if any difference. You might get a little less MPG with regular but you can check your mileage and see if one makes more sense than the other. Bottom line, don't sweat it ! Then again, don't go switching back and forth with every tank forcing your computer to adjust every time you fill up.
I haven't tried this on the FJ, but I know it was true in my 350Z the loss in gas mileage was enough to justify the premium fuel. I actually just switched to regular about 4 tanks ago and I think the truck seems a bit sluggish now and doesn't run as smooth. I am going back to premium after this tank(which I filled up last night) and see if that fixes the problem. I am about ready for my 30K mile tune up too, so that will probably smooth things out abit as well.With the increase in gas price (and you Americans ain't even close to us Canadian smucks yet!), I switched to premium (91+) octane and the mileage is better (I record this religously) and the FJ just seems to run better. I get more bang out of my gas money. Really, its only a couple of dollars more per fill and I get more mileage. It works out to the better.
Try it for your self, a couple of thousand miles on each and see. Yeah, regular won't hurt and I got many of miles on that, but premium is just that much better!