Type Of Gas?

[lws1]

Can get away with using anything less than premium gas in my 2002 IS300? I put the Chevron Techtron additive in every once in a while. Any suggestions would be appreciated. I am a nonmechanic and don't understand what the difference is. I understand premium is for higher performance cars... Thanks!

[Parking17]

The IS has a high reving engine. Because of this, the combustion chamber is hotter than most conventional cars and a higher octane fuel is needed to reduce pre-ignition. You could use a lower octane, but you may experience a little less horsepower and possibly knocks and pings upon accelleration. That is just my take on basic auto mechanics. I'm sure there will be more posts to follow from others.

[mburnickas]

If your gas pings use cheapest as you can find along with FP+. If you do not buy this fuel add, use the highest you can; but it would cost more in the end.

[heyoceanfloor]

because the engine is a higher compression engine you *need* higher octane fuel. the is300 2jz-ge engine is a 10:1 compression ratio, and that's decently high.. it helps squeeze a little more power out of the engine, and ultimately allows for some tinkering around under the hood. you should be fine between the mid-grade and premium-grade gas, just don't dip down to the lowest. i've noticed better gas mileage using 91 octane fuel as opposed to mid-grade. i'm at a high elevation though (7000+ ft) and if i'm not mistaken the lack of oxygen makes the 91 octane overkill a little bit.. but i love my car and it's not that much more expensive.

just stick to shell gas... and the other three "top tier" stations, I forgot what they are.

I'm sure someone else will chime in on this subject who's more knowledgeable than I am haha

[heyoceanfloor]

and as far as additives go... i like the BG stuff, but it's pricey.. just put better gas in :)