I have run costco premium, Shell and BP premium and others. All premiun, but cant tell any difference in performance or mileage. Probably use costco 50% of the time though. No codes that are gas specific.Costco makes my car throw a CEL for fuel evap. I think the code was P0440, but I could be wrong. and yes, it was costco's premium (91 here in AZ).
wish I could find 93 octane here.
You don't need to do anything really. I would run it normally down to E an full up with premium. If you are worried you could probably add an octane booster from autozone, but not really needed.I have a 2002 IS300 Sportcross. My mom put gas in it a day ago... she used regular and mines premium obviously. Is that terrible for my car using reg once? What do i do if anything?
Are you sure it's not the same as the US? It's been years since I read or knew the details of this but in England I think it's 91 93 and 95 (something like that) but they measure it different. So 91 in England is the equivalent of 87 in the US.basically 91 octane is the minimum....These engine were designed originally to run on 95 octane as japanland not only has better cars but better gas as well...
If you run less the engine will just retard the timing to prevent pinging and detonation..
MOre timing increases cylinder pressure which in turn produces more power, and the opposite is true as well.....
You are right.Are you sure it's not the same as the US? It's been years since I read or knew the details of this but in England I think it's 91 93 and 95 (something like that) but they measure it different. So 91 in England is the equivalent of 87 in the US.
I haven't owned this car long and have been using 89 but I guess I'll start using 91. I get 18mpg
That is true. Now there is a difference between summer and winter gasoline (colder climate areas where there is snow). Example A: Summer fuel has 5% alcohol to absorb moisture from the tank and fuel system in your car. Example B: Winter fuel has 20% alcohol to absorb the moisture since there is higher moisture content in the winter (SNOW). Now don't quote me 100% on the numbers because I do not know the exact ratio the fuel companies put in their mixtures but there is a difference between the summer and winter. I had myself an 02 Chrysler 300m with the 3.5L High Output motor... regular 87 octane... summer I usually got 20-22 mpg per tank and winter was 16-18. Since there is more alcohol in the winter it doesn't burn as efficiently hence the 16-18 mpg.today's gas already has additives to keep fuel systems clean, imo the whole additive market snake oil.
It's definitely more than 15. I believe it is 17, or 17.5 (edit, just looked at the owner's manual, it is 17.5)Edit: I thought our gas tank was 17 gallons, I guess its 15. So if that's try, that's about 21mpg highway. Probably closer to 23 if I actually drove it until the gas ran out.