My guess is, he was selling a 2000. The only thing I can think of is the pre-2000's burn premium. That said, with the knock sensor they can and will run very well on regular.
My guess is, he was selling a 2000. The only thing I can think of is the pre-2000's burn premium. That said, with the knock sensor they can and will run very well on regular.
That's true, but when I use regular (medium) grade gas in my 99 Seville SLS (24K miles) the MPG is lower than when using premium. It may be a false economy to use regular (or medium) grade gas.
'94 STS, 120K, the piss is driven out of it daily, and it works great...ran 92 and 93 octane for a while, but 87 works beautifully with not a problem...when I was in Wyoming and Kansas not too long ago, I went with the "mid" grade, which was 87, because they had 83 and 85 as their cheapest and though that might be pushing it a bit. Stick with the 87.
I ran premium til Bbob convinced me that it will run fine on 87 "crap". I cannot tell the difference in performance nor milage. Just because you pay more for it, doen't mean is is "better".
My '97 Eldo's Service Manual calls for 91 Octane or better. This is what I use and I get excellent fuel mileage for an engine that is as strong as the Northstar. Averages 27mpg commuting.
I have no intentions to go to 87 or 89 to save 10 or 20 cents a gallon.
The warning may be more in conjunction with the coolant system/headgasket issue which was more prevalent in the first gen N*s 92-95? which has been beat to death as an issue/problem on the boards, look around and you'll find more info.
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