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Discussion Starter #1
Ok, I knowit's subjective considering the car weight, gears, etc, but does anyone know the approx expected milage with the GM crate 502? This asumes it's more or less stock, not a modified motor, and used for street use.

Just something we were wondering at lunch, not actually looking into one (yet...)

Thanks, Kurt

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The 68 Chevelle info page. [last updated Nov. 30, 98]
www.geocities.com/~68_chevelle/Chevelle/Info.html
Email: [email protected]
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I KNOW A DUDE THAT'S GOT A 77 TRANS AM with a 455 SD Pontiac motor. It's got hp/torque numbers a little lower than the 502, and it gets 6 mpg highway or city, doesn't matter, on a 3400 lb car. It's a hot motor, though, with a lotta cam. But I wouldn't be looking at anything more than 8mpg in a 3800 lb Chevelle. It bites, don't it


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Another poor college student trying
to keep another Chevelle on the streets.

--70 Malibu--
350/300hp (more than that now)
and a decaying TH350
 

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Wait a minute! I read that question completely differently! Aren't you asking what it's life expectancy would be? As in total accumulated mileage before a rebuild is necessary?
 

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i interpit it same way TH does

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OWNER OF 66 CHEVELLE MALIBU
Check out page dedicated to resto of my chevelle. still being made.
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Canadian Classics Chevelles and Beaumonts #393

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Discussion Starter #5
Sorry, should have been more clear: expected Miles Per Gallon with a stock 502 in a Chevelle. Not built, moderate cam, etc. Just a plain GM 502 in a basic Chevelle.

Thanks, Kurt
 

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If I keep my foot out of it, my '68 Chevelle with a stock ZZ502/502 gets 10-12 mpg on the highway and 8-10 mpg around town. If I drive it a little hard, the mileage easily drops to 6-8 mpg. The car weighs 3750 lbs. (with me in it) and has 3.55 gears.
 

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I have the ZZ502 (stock, no headers)in my 70 with 3:08's and a 4-speed. As 68502 says 11-12 hwy, about 8 around town, and REALLY BAD when im playing....This is about the same as my wifes 5.4 Expedition but WAY WAY MORE FUN !!
 

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Who Cares, It's a 502.
If you want gas milage get a Honda.
I want a 502 so bad that I'm considering working a third job. Third job would make it a ZZ502. A guy at LACR has a 56 Chevy 4 door sedan, tubbed and it ran high 11's with a stock ZZ502 long block, edlebrock intake and headers. Awesome power potentials even starting with a long block

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JR
70 396SS El Camino #'s Matching.
69 396SS Chevelle, project "Street Bruiser"
H-D Ultra Classic E-Glide
I live to own toyz...
 

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Discussion Starter #10

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Byfield,
No offensive, I apologize for that statement. I thought of the 502 as a racing application. I did not mean it as it sounds, that I'm uncaring.

In the future I will curb remarks like that.

My 396/402 gets about 12 Highway and 8 in town.
Just have to learn to keep my foot out of it.


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JR
70 396SS El Camino #'s Matching.
69 396SS Chevelle, project "Street Bruiser"
H-D Ultra Classic E-Glide
I live to own toyz...
 

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If you want to max the mileage on this beast, build it for lots of low torque...carb(Q-Jet - 850 if you can find), intake (dual plane), headers (tri-y w/crossover) and low end cam (not RV, performance 1500-5000 revs-brand name computer grind). Then get a 700 R4 (with a .7 final gear) or a 20% over/under drive, and keep your rear gears in the low 3s (with that much torque, you won't need anything lower anyway)...With O/D you can have high teens mileage (at 65-70mph), and still rip when you want to.

My 2 cents...

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68 El Camino...Slow, Much Work Required
98 Z28...Fast, No Work Required
Goodfellow AFB, San Angelo, TX -- Where? That's what I said..
 
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