New 6.2 first trip mileage report
06-28-2011, 03:08 PM
#22
3.73s, they came with the Max Tow pkg. Far as I'm concerned, gears are the number one ticket to acceleration, and with a 6 sp trans that has two overdrives it was an easy choice to go for the 3.73s.
I used to have a '76 Suburban with a built 400 smallblock, TH350 and 4.11s. It was a beast, but listening to the Flowmasters at 3500 rpm on the freeway got old. I finally had a 700R4 built to take the power ... man what a difference. The lower first gear was nice, too.
I used to have a '76 Suburban with a built 400 smallblock, TH350 and 4.11s. It was a beast, but listening to the Flowmasters at 3500 rpm on the freeway got old. I finally had a 700R4 built to take the power ... man what a difference. The lower first gear was nice, too.
06-28-2011, 06:00 PM
#23
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I have 3.73s and 285s too, but your mileage seems better than mine. Though it was the tires plus the gear. Hmmm. I got tuned by BlackBear yesterday and I'll have a tonneau cover on within the next week, and I'll be happy if I can set the cruise to 78 and average 16+ during our upcoming vacation.
06-28-2011, 11:23 PM
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cruise set at 72 mph {gps indicated}. coming out of chicago to des moines on sunday. then got to missouri. hills killed the mpg.
i run a **** ton of timing in the truck on e85, hence the mpg fun.
i run a **** ton of timing in the truck on e85, hence the mpg fun.
07-02-2011, 04:40 PM
#26
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It all depends on what quality of gas and tune you have as with any motor. My 2010 CCSB 6.2 z71 with 3.42s gets 16.5-16.8 after a tank of mixed driving on 87 octane. Mixed driving for me is about 50 hwy miles and 25 miles of gravel roads and pipeline right aways per day. We're talking 1-2 gear only, creeping along the roughest roads you can imagine.
Here's my breakdown
87 octane - 18 hwy, 16.5 mixed, 13 city
91 octane - 20.5 hwy, 17.3 mixed, 14 city
Now my tuner has set my fuel tables up awesome. We've spent a lot of time doing nothing but fuel and timing tables. I'm also running a metric F ton of timing on 91 octane, which helps a lot.
Here's my breakdown
87 octane - 18 hwy, 16.5 mixed, 13 city
91 octane - 20.5 hwy, 17.3 mixed, 14 city
Now my tuner has set my fuel tables up awesome. We've spent a lot of time doing nothing but fuel and timing tables. I'm also running a metric F ton of timing on 91 octane, which helps a lot.
seriously 100 miles for half a tank? I've been getting 310 a tank all city, but just put 456 gears in, and I'm getting 2mpg better so far.
07-08-2011, 03:01 AM
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If you pay attention, it wasn't really half of the tank, it was 9.4 gallons. At that rate he would get 275 miles on a tank, which isn't that much lower than 310.