Gas mileage

I'm wondering what kind of mileage other LS1 conversions are getting . I have a 98 LS1 with no Nelson tune as yet in my 94 half ton . She still has the stock gears which I think are 3: 08 and a 4L60 tranny . I went up to north Mississippi this weekend to look at a house and topped off with 93 octane before I left. I'm figuring pretty close to 20 mpg and that was running the a/c most of the way and cruising at about 75mph with the occasional burst up to 90 . Does this sound right and would a Nelson tune improve the mileage ? I was really thinking I'd get closer to 22mpg :sad: . I was also amazed at gas prices up there . I paid $2.76 for premium up there versus $3.19 down here in N.O. Thanks :rock:

That's really good MPG you're getting there. I got 18 MPG with 3.42s in my xcab. You must have been running downhill most of the way, considering the elevation change from Northern Miss to sea level.

I can't speak for LS1s, but my 5.3 is averagin 18s @ 70mph. I'm so low b/c I'm running 4.10s, and seems my TCC isn't locking up.

Actually I haven't topped off since returning (which would be coming downhill!) - I only calculated that figure when topping off in again in N. Miss. , Red . So you think this is about right then ? I know it's not bad and it's sure a hell of a lot better than that 4.3 pos used to get which was around 17 on the highway . Thanks for the feedback . Jim

<div class='quotetop'>QUOTE(LS1CHEYENNE &#064; Aug 21 2006, 07&#58;49 AM) [snapback]61830[/snapback]</div>

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I know it&#39;s not bad and it&#39;s sure a hell of a lot better than that 4.3 pos used to get which was around 17 on the highway.[/b]

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You had a 4.3L too? :point: Me too&#33; As long as I go easy on the long, skinny pedal, I&#39;ve averaged 18mpg w/ 4.10s. Of course, that was hard as hell, and I&#39;ve got in it once or twice. I&#39;ve filled up once, and took a 100mi (round trip) to work and back home, "hot-dogged" the whole time, and refused to do the calcs b/c I was below a half-tank (nearly at 1/4) when I got back home. :laugh:

That&#39;s fantastic mileage for an engine pusing 4: 10 gears . I&#39;ve got to admit that whenever you post these days C10 that I&#39;d rather stare at your avatar then read what you&#39;re typing &#33; :lol: If that&#39;s your girlfriend then I&#39;m jealous&#33; What is she saying anyway ? More :pics: ?

Isn&#39;t she saying "pants off please&#33;".

<div class='quotetop'>QUOTE(GMCwantsLS1 &#064; Aug 24 2006, 07&#58;23 PM) [snapback]62258[/snapback]</div>

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Isn&#39;t she saying "pants off please&#33;".
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I think she&#39;s singing. Not sure what she&#39;s singing, but she is hot. mmmmm :drool:

"pants off, blow job" is my guess.....

LOL... ok&#33; Guess I&#39;ll have to find something better or remove this from the board due to distraction.