Gas ?

[Jimbo]

A friend of mine's brother from out of town was visiting
and he came over to see my Cruiser.He's has a GT and I said
the bad thing about a GT is you have to use primeum gas.He said
all he uses is regular unleaded with ethenal which is 90 octain.
Is this true?He has had his GT for over a year and a half and has had no problems.I thought you had to use 93 octain.

[crazie.eddie]

Stock GT is fine using medium grade. If you want better performance or if you have Stage 1, you should be using the higher octane rating.

[quicksilverdon]

Knock sensor ought to keep harm from being done, but it'll retard ignition to prevent ping, and that'll keep performance down.

[Jimbo]

[quote]Originally posted by crazie.eddie

Stock GT is fine using medium grade. If you want better performance or if you have Stage 1, you should be using the higher octane rating.
[/quotte

ED, how about turbo lite with stage 1?

[Cal Cruzer]

[quote]quote:Originally posted by Jimbo

Originally posted by crazie.eddie

Stock GT is fine using medium grade. If you want better performance or if you have Stage 1, you should be using the higher octane rating.
[/quotte

ED, how about turbo lite with stage 1?

Stage 1 changes timing and fuel curves. To get the most performance out of it you need premium or else the knock sensor will pull timing, reducing performance.

[Mike-in-Orange]

[quote]quote:Originally posted by Jimbo

Originally posted by crazie.eddie

Stock GT is fine using medium grade. If you want better performance or if you have Stage 1, you should be using the higher octane rating.
[/quotte

ED, how about turbo lite with stage 1?

Stage 1 levels the playing field. If you start with an HO GT or a Turbo Lite and add S1 to either, you end up in the exact same place. Premium fuel is then recommended, although you could probably safely use mid-grade is needed. At around 10 cents a gallon more for premium I figure it's about a buck and half per tank more for the good stuff - so it's all I've used since putting S1 on my Lite.

[SteelBlueGT]

Here is my question, why invest in stage 1 and then retard the whole thing by using regular or mid grade fuel?? When prices go sky high I too use regular grade 87 octane if I am only going around town but I dont have stage 1![8)]

[MichaelDay]

[|)] My feelings even for the GT/High Output turbo. It was designed to run on premium gasoline and will try to protect itself from damage by cutting back on power when a lower grade of gasoline is used but I can certainly tell a difference between performance with premium vs mid grade and I personally would not use regular in my GT unless I had no alternative. Stage 1 makes the need for premium totally necessary. With the turbo lite (without Stage 1) there is not a problem with running lower grades of gasoline since it was tuned for the lower grades and in fact running premium in a standard turbo lite may be a waste of money.

As Mike-In-Orange described, the turbo lite with Stage 1 is the same as a GT/HO with Stage 1 so premium is required.