Kizashi Club

Well, I've been playing around with various gas suppliers and octane to see how the car responds. On the way home from Philly Airport, I was running low so had to make a pit stop at Sunoco on the turnpike near the Lehigh Valley exit. Fed it some Sunoco 92 and what a big mistake that was!

First 100 miles appeared to be OK. MPG on the trip comp was reading 28MPG (It was all highway) then I reached home. Next day, the car struggled to start but it did. I began noticing some stuttering pressing on the gas to the point where it almost stalled out a few times. It ran like this for a couple more days. I went to go fill up at an exxon gas station and while the trip comp read 27 MPG, the actual mpg was 21.5!!! The trip is usually off by 1 or 2 but in this case it was off 5 1/2. And to top it off, most of it was highway. This was well off the normal mpg I see out of this car.

We'll see how the kizzy reacts to a fresh tank of exxon 87 but I'm thinking one of the plugs are fried or something. Wouldn't I get an error code or something if this was the case?

If you had a truly bad plug it would miss, and you would know. It is unlikely that you have a bad plug unless you have a ton of miles on the car.

Most people don't buy over-priced gas on the turnpike, fewer yet buy extremely over-priced premium grades on the turnpike. Most people don't buy premium these days at all. That gas in the ground was ancient, plain and simple. Either that, or the tank was so low (cause nobody buys it) there was more condensate water in the underground tank than gas. Either way, not good for you.

I'd run a bottle of fuel system cleaner through it after that episode. If you have a place to get BG products, I'd go that route. My GMC dealer carries the stuff, and when needed that's where I get it.

That's a good idea. It seems to be doing better on a new tank of gas but the MPG is still lower than usual. I'll try to put some fuel cleaner in it.

I like Seafoam better than BG for the price.

at least yours doesn't require premium. I think I just put a full tank of bad gas in my 92x aero. I cant get the car to build any boost at all so it is like driving a slow 2L car. I had the intercooler out the night before so I figured I had something screwed up, but I took it all back apart last night and reassembled it. I could not find any boost leaks so now i'm think I just have bad gas.(I think boost was normal before I filled) We will see. I may run a tank of race or aviation gas through it after this. Octane boost had no affect.

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My '11 S AWD responds best burning Mobil premium.
My testing confirms it (yet, oddly, I continue testing in hopes of finding alternatives. Sadly, local brand selection remains limited).